UNITED STATES PATENT AND TRADEMARK OFFICE
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`———————
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`BEFORE THE PATENT TRIAL AND APPEAL BOARD
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`———————
`
`
`
`
`
`Cisco Systems, Inc.,
`Petitioner
`
`———————
`
`Case IPR2016-_____
`
`U.S. Patent No. 8,718,158
`
`_____________________
`
`
`
`DECLARATION OF DR. JOSE TELLADO, UNDER
`37 C.F.R. § 1.68 IN SUPPORT OF PETITION FOR
`INTER PARTES REVIEW OF U.S. PATENT NO. 8,718,158
`
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`Exhibit 1009 Page 1
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`

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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
`
`TABLE OF CONTENTS
`
`Introduction ...................................................................................................... 4
`I.
`Background and Qualifications ....................................................................... 6
`II.
`III. Level of Ordinary Skill in the Pertinent Art .................................................... 7
`IV. Relevant Legal Standards .............................................................................. 10
`V.
`The ’158 Patent .............................................................................................. 12
`A. Overview ............................................................................................. 12
`B.
`Prosecution History of the ’158 Patent ............................................... 18
`C.
`Priority Date of the ’158 Patent........................................................... 18
`VI. Claim Construction ........................................................................................ 18
`A.
`“multicarrier” ....................................................................................... 18
`B.
`“transceiver” ........................................................................................ 20
`VII. Challenge #1: Claims 1, 2, 4, 15, 16, & 18 are Unpatentable Over
`Shively and Stopler ........................................................................................ 23
`A. Overview of Shively ............................................................................ 23
`B.
`Overview of Stopler ............................................................................ 25
`C.
`Reasons to Combine Shively and Stopler ........................................... 27
`D. Detailed Analysis ................................................................................ 30
`VIII. Challenge #2: Claims 3, 5, 14, 17, 19, and 28-30 are unpatentable
`over Shively, Stopler, and Gerszberg ............................................................ 61
`A. Overview of Gerszberg ....................................................................... 61
`B.
`Reasons to Combine Shively and Stopler with Gerszberg ................. 62
`C.
`Detailed Analysis ................................................................................ 66
`IX. Challenge #3: Claims 6, 9, 10, 12, 20, 23, 24, and 26 are unpatentable
`over Shively, Stopler, and Bremer ................................................................ 72
`A. Overview of Bremer ............................................................................ 73
`B.
`Reasons to Combine Shively and Stopler with Bremer ...................... 73
`C.
`Detailed Analysis ................................................................................ 76
`Challenge #4: Claims 8, 11, 13, 22, 25 and 27 are unpatentable over
`Shively, Stopler, Bremer, and Gerszberg ...................................................... 85
`
`X.
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`

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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
`
`A.
`
`Reasons to Combine Shively, Stopler, and Bremer with
`Gerszberg ............................................................................................. 86
`Detailed Analysis ................................................................................ 86
`B.
`XI. Challenge #5: Claims 7 and 21 are Unpatentable over Shively,
`Stopler, Bremer, and Flammer ...................................................................... 89
`A. Overview of Flammer ......................................................................... 89
`B.
`Reasons to Combine Shively, Stopler, and Bremer with
`Flammer ............................................................................................... 90
`Detailed Analysis ................................................................................ 92
`C.
`XII. Conclusion ..................................................................................................... 98
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`Exhibit 1009 Page 3
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`

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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
`
`I, Dr. Jose Tellado, do hereby declare as follows:
`
`I.
`
`
`INTRODUCTION
`
`1.
`
`I have been retained as an independent expert declarant on behalf of
`
`Cisco Systems, Inc. (“Cisco”) for the above-captioned Petition for Inter Partes
`
`Review (“IPR”) of U.S. Patent No. 8,718,158 (“the ’158 patent”). I am being
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`compensated at my usual and customary rate for the time I spend in connection
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`with this IPR. My compensation is not affected by the outcome of this matter.
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`2.
`
`I have been asked to provide my opinions regarding whether claims 1-
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`30 (“the Challenged Claims”) of the ’158 patent are invalid as they would have
`
`been obvious to a person having ordinary skill in the art (“POSITA”) at the time of
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`the alleged invention. It is my opinion that all of the limitations of claims 1-30
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`would have been obvious to a POSITA after reviewing the Shively, Stopler,
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`Gerszberg, and Bremer references, as discussed further below.
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`3.
`
`The ’158 patent issued on May 6, 2014, from U.S. Patent Appl. No.
`
`13/303,417 (“the ’417 Application”), filed on November 23, 2011. The ’417
`
`Application is a continuation of application No. 12/783,725, filed on May 20,
`
`2010, now U.S. Pat. No. 8,090,008, which is a continuation of U.S. Patent Appl.
`
`No. 12/255,713, filed Oct. 22, 2008, now U.S. Pat. No. 7,769,104, which is a
`
`continuation of U.S. Patent Appl. No. 11/863,581, filed Sep. 28, 2007, now U.S.
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`Pat. No. 7,471,721, which is a continuation of U.S. Appl. No. 11/211,535, filed
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`

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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
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`Aug. 26, 2005, now U.S. Pat. No. 7,292,627, which is a continuation of U.S. Patent
`
`Appl. No. 09/710,310, filed Nov. 9, 2000, now U.S. Pat. No. 6,961,369.
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`4.
`
`The ’158 patent also claims the benefit of U.S. Provisional
`
`Application No. 60/164,134, filed on November 9, 1999.
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`5.
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`The face of the ’158 patent names Marcos C. Tzannes as the
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`purported inventor. Further, the face of the ’158 patent identifies TQ Delta, LLC as
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`the initial assignee of the ’158 patent.
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`6.
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`In preparing this Declaration, I have reviewed:
`
`a)
`
`b)
`
`c)
`
`the ’158 patent, Ex. 1001;
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`the file history of the ’158 patent, Ex. 1002;
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`the file histories of the patent applications to which the ’158
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`patent claims priority, Ex. 1003-1008; and
`
`d)
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`the prior art references discussed below, Ex. 1011-1013, 1017,
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`and 1019.
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`7.
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`In forming the opinions expressed in this Declaration, I relied upon
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`my education and experience in the relevant field of art, and have considered the
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`viewpoint of a POSITA, as of November 9, 1999 (the earliest claimed priority
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`date). I have also considered:
`
`a)
`
`the documents listed above,
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`

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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
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`b)
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`the additional documents and references cited in the analysis
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`below,
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`c)
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`the relevant legal standards, including the standard for
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`obviousness, and
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`d) my knowledge and experience based upon my work in this area
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`as described below.
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`8.
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`I understand that claims in an IPR are given their broadest reasonable
`
`interpretation in view of the patent specification and the understandings of a
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`POSITA. I further understand that this is not the same claim construction standard
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`as one would use in a District Court proceeding.
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`9.
`
`Unless otherwise noted, all bold italics emphasis in any quoted
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`material has been added.
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`
`
` BACKGROUND AND QUALIFICATIONS II.
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`10. My qualifications are set forth in my curriculum vitae, a copy of
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`which is attached as Ex. 1010 submitted with this declaration. As set forth in my
`
`curriculum vitae:
`
`11.
`
`I received a Ph.D. in Electrical Engineering from Stanford in 1999.
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`The topic of my Ph.D. dissertation was peak-to-average ratio (PAR) power
`
`reduction for multicarrier modulation. I also received a Master of Science degree in
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`Electrical Engineering from Stanford in 1994 and a Bachelor of Science degree in
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`Exhibit 1009 Page 6
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`

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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
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`Telecommunication Engineering from the University of Santiago de Compostela
`
`(Spain) in 1992.
`
`12.
`
`I have over twenty years of experience in a wide range of technologies
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`and industries relating to signal processing and data communication. My industry
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`experience includes development of multicarrier modulation advancements using
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`technologies such as Discrete Multitone Modulation (DMT) and Quadrature
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`Amplitude Modulation (QAM).
`
`13.
`
`I am listed as an inventor on over sixty patent applications, of which
`
`over thirty of the patent applications have been issued as patents.
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`14.
`
`I authored the book “Multicarrier Modulation with Low PAR:
`
`Applications to DSL and Wireless” that was published in 2000. I am an author of
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`fifteen IEEE publications, which include subject matter in the areas of xDSL,
`
`WiMAX, and Ethernet communication technologies. I submitted several PAR
`
`reduction contributions to xDSL standards at ANSI T1E1.4, ETSI TM6 and ITU. I
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`was a key contributor to IEEE standardization efforts relating to 802.16 (WiMAX)
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`and 802.3an (10GBase-T).
`
`
`
` LEVEL OF ORDINARY SKILL IN THE PERTINENT ART III.
`
`15.
`
`I understand there are multiple factors relevant to determining the
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`level of ordinary skill in the pertinent art, including (1) the levels of education and
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`experience of persons working in the field at the time of the invention; (2) the
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`
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`

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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
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`sophistication of the technology; (3) the types of problems encountered in the field;
`
`and (4) the prior art solutions to those problems. There are likely a wide range of
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`educational backgrounds in the technology field pertinent to the ’158 patent.
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`16.
`
`I am very familiar with the knowledge and capabilities that a person
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`of ordinary skill in the art (POSITA) of multicarrier communications would have
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`possessed during the late 1990’s, especially as it relates to managing the peak-to-
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`average ratio (PAR) of multicarrier signals. Specifically, through my PhD research
`
`work I interacted with numerous individuals working on reducing PAR for
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`multicarrier communication systems, such as digital subscriber line (DSL). I
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`attended meetings of the group that drafted the ANSI T1.413 standard for
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`asymmetric DSL (ADSL). At those meetings, I met and worked with engineers
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`practicing in the industry who were actively working in the area of multicarrier
`
`communications.
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`17. These experiences during the relevant timeframe allowed me to
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`become personally familiar with the knowledge and capabilities of a POSITA in
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`the area of multicarrier communications. Unless otherwise stated, my testimony
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`below refers to the knowledge of a POSITA in the field of multicarrier
`
`communications during the time period around the priority date of the ’158 patent.
`
`18.
`
`In my opinion, the level of a POSITA needed to have the capability of
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`understanding multicarrier communications and engineering principles applicable
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`
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`

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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
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`to the ’158 patent is (i) a Master’s degree in Electrical and/or Computer
`
`Engineering, or equivalent training, and (ii) approximately five years of experience
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`working with multicarrier communications systems. Lack of work experience can
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`be remedied by additional education, and vice versa. This level of education and
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`experience, in my opinion, represents the average education and experience level
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`of the engineers working on multicarrier communications around November 1999.
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`Such academic or industry experience would be necessary to appreciate what was
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`obvious and/or anticipated in the industry and what a POSITA would have thought
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`and understood at the time. For example, an understanding of the ’158 patent
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`requires an appreciation of digital communications using discrete multitone (DMT)
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`signals, and an appreciation for the potential for such multicarrier signals to have a
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`high peak-to-average ratio, causing clipping during transmission. Such knowledge
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`would be within the level of skill in the art. I believe I possess such experience
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`and knowledge, and am qualified to opine on the ’158 patent.
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`19. For purposes of this Declaration, in general, and unless otherwise
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`noted, my statements and opinions, such as those regarding my experience and the
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`understanding of a POSITA generally (and specifically related to the references I
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`consulted herein), reflect the knowledge that existed in the field as of November
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`1999.
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`

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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
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`
` RELEVANT LEGAL STANDARDS IV.
`
`20.
`
`I understand that prior art to the ’158 patent includes patents and
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`printed publications in the relevant art that predate the earliest claimed priority date
`
`of the alleged invention recited in the ’158 patent.
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`21.
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`I understand that a claim is invalid if it is anticipated. Anticipation of
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`a claim requires that every element of a claim be disclosed expressly or inherently
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`in a single prior art reference, arranged in the prior art reference as arranged in the
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`claim.
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`22.
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`I also understand that a claim is invalid if it would have been obvious.
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`Obviousness of a claim requires that the claim would have been obvious from the
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`perspective of a POSITA at the time the alleged invention was made. I understand
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`that a claim could have been obvious from a single prior art reference or from a
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`combination of two or more prior art references.
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`23.
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`I understand that an obviousness analysis requires an understanding of
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`the scope and content of the prior art, any differences between the alleged
`
`invention and the prior art, and the level of ordinary skill in evaluating the
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`pertinent art.
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`24.
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`I further understand that certain factors may support or rebut the
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`obviousness of a claim. I understand that such secondary considerations include,
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`among other things, commercial success of the patented invention, skepticism of
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`

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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
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`those having ordinary skill in the art at the time of invention, unexpected results of
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`the invention, any long-felt but unsolved need in the art that was satisfied by the
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`alleged invention, the failure of others to make the alleged invention, praise of the
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`alleged invention by those having ordinary skill in the art, and copying of the
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`alleged invention by others in the field. I understand that there must be a nexus—a
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`connection—between any such secondary considerations and the alleged invention.
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`I also understand that contemporaneous and independent invention by others is a
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`secondary consideration tending to show obviousness.
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`25.
`
`I further understand that a claim would have been obvious if it unites
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`old elements with no change to their respective functions, or alters prior art by
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`mere substitution of one element for another known in the field and that
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`combination yields predictable results. While it may be helpful to identify a reason
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`for this combination, common sense should guide and no rigid requirement of
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`finding a teaching, suggestion, or motivation to combine is required. When a
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`product is available, design incentives and other market forces can prompt
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`variations of it, either in the same field or different one. If a POSITA can
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`implement a predictable variation, obviousness likely bars its patentability. For the
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`same reason, if a technique has been used to improve one device and a POSITA
`
`would recognize that it would improve similar devices in the same way, using the
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`technique would have been obvious. I understand that a claim would have been
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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
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`obvious if common sense would have directed a POSITA to combine multiple
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`prior art references or add missing features to reproduce the alleged invention
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`recited in the claims.
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`26.
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`I am not aware of any allegations by the named inventor of the ’158
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`patent or any assignee of the ’158 patent that any secondary considerations tend to
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`rebut the obviousness of any Challenged Claim of the ’158 patent.
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`
`
` THE ’158 PATENT V.
`
`A. Overview
`
`27. The ’158 patent relates “to communications systems using
`
`multicarrier modulation.” Ex. 1001, 1:28-29. More specifically, the ’158 patent
`
`states that “the present invention features a system and a method that scrambles the
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`phase characteristics of the modulated carrier signals in a transmission signal.” Ex.
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`1001, 2:36-38. This phase scrambling is described in the context of a digital
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`subscriber line (DSL) communication system that includes a discrete multitone
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`(DMT) transmitter. Ex. 1001, 3:27-31. While the purpose of the phase scrambling
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`is not identified in the claims, the specification states that the phase scrambling is
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`used to “produce a transmission signal with a reduced PAR.” Ex. 1001, Abstract.
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`28. Fig. 1 of the ’158 patent illustrates a functional block diagram of an
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`exemplary communication system capable of the claimed techniques.
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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
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`Ex. 1001, FIG. 1
`
`29.
`
`In the ’158 patent, the “conventional multicarrier communication
`
`
`
`systems” employ “multicarrier modulation or Discrete Multitone Modulation
`
`(DMT).” Ex. 1001, 1:35-38. Multicarrier modulation and Discrete Multitone
`
`Modulation are described as communications that use a transmission signal
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`“having a plurality of carrier signals.” Ex. 1001, 3:27-31. The plurality of carrier
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`signals used for the transmission are also referred to interchangeably as “carriers,”
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`“sub-channels” or “tones.” Ex. 1001, 1:38 (“carrier signals (carriers) or
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`subchannels”), 3:34-36 (“Although described with respect to discrete multitone
`
`modulation, the principles of the invention also apply to other types of multicarrier
`
`modulation….”) (emphasis added).
`
`30. The ’158 patent describes in its Background section that “generating a
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`transmission signal with a Gaussian probability distribution is important in order to
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`transmit a transmission signal with a low peak-to-average ratio (PAR), or peak-to-
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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
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`average power ratio.” Ex. 1001, 1:64-67. And, in the Background section, the
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`’158 patent indicates that a low PAR is desirable because “[a]n increased PAR can
`
`result in a system with high power consumption and/or with high probability of
`
`clipping the transmission signal.” Ex. 1001, 2:27-29. Accordingly, in conventional
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`multicarrier communication systems, the PAR of a transmission signal “is an
`
`important consideration in the design of the DMT communication system because
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`the PAR of a signal affects the communication system’s total power consumption.”
`
`Ex. 1001, 2:12-16.
`
`31. As part of DMT modulation, the communication systems in the ’158
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`patent employ quadrature amplitude modulation or QAM. Ex. 1001, 3:65-4:11.
`
`The ’158 patent describes how each of the multiple carrier signals is modulated to
`
`convey data using quadrature amplitude modulation (QAM). Ex. 1001, 3:65-4:11.
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`QAM is a prior art technique, which a POSITA would have been familiar with,
`
`that manipulates both the amplitude and phase of the carrier. By using multiple
`
`amplitudes and phase shifts, one or more bits of data can be modulated onto the
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`carrier simultaneously. A specific amplitude and phase combination is sometimes
`
`referred to as a QAM symbol, and the relationship between these QAM symbols
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`and the data that they represent is called a constellation. Depicted below is an
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`example of a 16-level QAM constellation showing 16 different combinations of
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`phase and amplitude, each of which would represent a distinct 4-bit value.
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`
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`

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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
`
`1100
`
`0000
`
`0100
`
`1100
`
`1000
`
`0001
`
`0101
`
`1101
`
`1001
`
`0011
`
`0111
`
`1111
`
`1011
`
`0010
`
`0110
`
`1110
`
`1010
`
`
`32. The transceiver of the ’158 patent includes a QAM encoder 42. Ex.
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`1001, Fig. 1. The QAM encoder 42 receives “an input serial data bit stream 54”
`
`and uses the data bit stream to generate “QAM symbols 58.” Ex. 1001, 3:65-67.
`
`For instance, the ’158 patent describes that “the QAM encoder 42 maps the input
`
`serial data bit stream 54 into N parallel quadrature amplitude modulation (QAM)
`
`constellation points 58, or QAM symbols 58” where “N represents the number of
`
`carrier signals generated by the modulator 46.” Ex. 1001, 4:3-7. The ’158 patent
`
`also describes that the QAM encoder 42 can vary the number of bits per symbol
`
`using BAT 44 component which “is in communication with the QAM encoder 42
`
`to specify the number of bits carried by each carrier signal.” Ex. 1001, 4:7-9. And,
`
`like other conventional DMT systems, the ’158 patent acknowledges that the
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`“QAM symbols 58 represent the amplitude and the phase characteristic of each
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`carrier signal.” Ex. 1001, 4:9-11.
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`
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`

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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
`
`33.
`
`In order to modulate the QAM symbols 58 onto the N carrier signals,
`
`the ’158 patent employs modulator 46. Ex. 1001, 4:12-30. Modulator 46 is another
`
`component of the transceiver shown in Fig. 1 and “modulates each carrier signal
`
`with a different QAM symbol 58.” Ex. 1001, 4:15-16. And, according to the ’158
`
`patent, this modulation yields a conventional result where “carrier signals have
`
`phase and amplitude characteristics based on the QAM symbol 58 and therefore
`
`based on the input-bit stream 54.” Ex. 1001, 4:16-19.
`
`34. The ’158 patent further describes how a “bit scrambler is often used in
`
`the DMT transmitter to scramble the input data bits before the bits are modulated
`
`to assure that the transmitted data bits are random and, consequently, that the
`
`modulation of those bits produces a DMT transmission signal with a Gaussian
`
`probability distribution.” Ex. 1001, 1:57-61.
`
`35. The ’158 provisional patent Application (Ex. 1008) describes in its
`
`Background that phases of the modulated carriers “may not be random enough to
`
`generate a ‘Gaussian distributed’ transmitted signal.” Ex. 1008, p. 1. The ’158
`
`patent allegedly addresses this problem by including “a phase scrambler.” Ex.
`
`1001, 1:62-3:5. The “phase scrambler” “combines a phase shift computed for each
`
`QAM-modulated carrier signal with the phase characteristic of that carrier signal.
`
`Ex. 1001, 4:31-34.
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`

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`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
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`36.
`
`Independent claim 1 is generally representative of the Challenged
`
`Claims:
`
`1. In a multicarrier modulation system including a first
`transceiver in communication with a second transceiver
`using a transmission signal having a plurality of carrier
`signals for modulating a plurality of data bits, each carrier
`signal having a phase characteristic associated with at least
`one bit of the plurality of data bits, a method for scrambling
`the phase characteristics of the carrier signals comprising:
`
`transmitting the plurality of data bits from the first
`
`
`transceiver to the second transceiver;
`
`associating a carrier signal with a value determined
`
`
`independently of any bit of the plurality of data bits carried
`by the carrier signal, the value associated with the carrier
`signal determined by a pseudo-random number generator;
`
`determining a phase shift for the carrier signal at
`
`
`least based on the value associated with the carrier signal;
`
`modulating at least one bit of the plurality of data
`
`
`bits on the carrier signal;
`
`modulating the at least one bit on a second carrier
`
`
`signal of the plurality of carrier signals.
`
`
`
`17
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`DISH
`Exhibit 1009 Page 17
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`

`
`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
`B.
`
`Prosecution History of the ’158 Patent
`
`37.
`
`I have reviewed the prosecution history of the ’158 patent and it is my
`
`understanding that none of the references cited in this declaration have been
`
`substantively considered by the United States Patent Office.
`
`C.
`
`38.
`
`Priority Date of the ’158 Patent
`
`I have been informed that the earliest claimed priority date for the
`
`’158 patent is November 9, 1999.
`
`
`
` CLAIM CONSTRUCTION VI.
`
`39.
`
`It is my understanding that in order to properly evaluate the ’158
`
`patent, the terms of the claims must first be interpreted. It is my understanding that
`
`the claims are to be given their broadest reasonable interpretation in light of the
`
`specification. It is my further understanding that claim terms are given their
`
`ordinary and accustomed meaning as would be understood by a POSITA, unless
`
`the inventor, as a lexicographer, has set forth a special meaning for a term.
`
`40.
`
`In order to construe the claims, I have reviewed the entirety of the
`
`’158 patent along with its prosecution history.
`
`A.
`
`“multicarrier”
`
`41. The term “multicarrier” appears in each of claims 1-30 either directly
`
`or by dependency.
`
`
`
`18
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`DISH
`Exhibit 1009 Page 18
`
`

`
`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
`
`42. The ’158 patent’s specification does not provide an express definition
`
`for the term “multicarrier.” However, the background of the ’158 patent states:
`
`“In a conventional multicarrier communications system,
`transmitters communicate over a communication channel using
`multicarrier modulation or Discrete Multitone Modulation
`(DMT). Carrier signals (carriers) or sub-channels spaced
`within a usable frequency band of the communication
`channel are modulated at a symbol (i.e., block) transmission
`rate of the system. An input signal, which includes input data
`bits, is sent to a DMT transmitter, such as a DMT modem. The
`DMT transmitter typically modulates the phase characteristic,
`or phase, and amplitude of the carrier signals using an Inverse
`Fast Fourier Transform (IFFT) to generate a time domain
`signal, or transmission signal, that represents the input signal.
`The DMT transmitter transmits the transmission signal, which
`is a linear combination of the multiple carriers, to a DMT
`receiver over the communication channel.”
`
`
`Ex. 1001, 1:35-49.
`
`43. A POSITA would have been familiar with the concept of an Inverse
`
`Fast Fourier Transform (IFFT) based multicarrier, which is described by the ’158
`
`patent as a “conventional multicarrier communication system.” Ex. 1001, 1:35-47.
`
`The general purpose of a multicarrier—as the specification suggests—is to
`
`communicate using multiple carrier signals. As identified by the ’158 patent, it
`
`
`
`19
`
`DISH
`Exhibit 1009 Page 19
`
`

`
`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
`
`was known that Discrete Multitone (DMT) used multiple carriers for data
`
`transmission.
`
`44. While the ’158 patent uses the term “multicarrier” in the context of
`
`DMT, a multicarrier is not limited to DMT. For example, as described by the ’158
`
`patent’s specification, a multicarrier may also be implemented in technologies
`
`other than DMT:
`
`to discrete multitone
`Although described with respect
`modulation, the principles of the invention apply also to other
`types of multicarrier modulation, such as, but not limited to,
`orthogonally multiplexed quadrature amplitude modulation
`(OQAM), discrete wavelet multitone (DWMT) modulation, and
`orthogonal frequency division multiplexing (OFDM).
`
`
`Ex. 1001, 3:34-39.
`
`45. Consistent with these statements, I believe that a POSITA would have
`
`understood that the broadest reasonable interpretation of “multicarrier” includes
`
`“multiple carriers” that are not limited to any particular modulation technology.
`
`B.
`
`“transceiver”
`
`46. The term “transceiver” appears in claims 1-28.
`
`47. Claims 1 refers to the claimed transceiver “transmitting” a plurality of
`
`data bits.
`
`
`
`20
`
`DISH
`Exhibit 1009 Page 20
`
`

`
`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
`
`48. The ’158 patent’s specification does not provide an express definition
`
`for the term “transceiver.” However, the ’158 patent specification states that a
`
`“transceiver” may include a discrete multitone (DMT) transmitter and receiver, but
`
`that the transceiver may also be implemented using modulation technology other
`
`than DMT:
`
`FIG. 1 shows a digital subscriber line (DSL) communication
`system 2 including a discrete multitone (DMT) transceiver 10
`in communication with a remote transceiver 14 over a
`communication channel 18 using a transmission signal 38
`having a plurality of carrier signals. The DMT transceiver 10
`includes a DMT transmitter 22 and a DMT receiver 26. The
`remote transceiver 14 includes a transmitter 30 and a receiver
`34. Although described with respect to discrete multitone
`modulation, the principles of the invention apply also to other
`types of multicarrier modulation, such as, but not limited to,
`orthogonally multiplexed quadrature amplitude modulation
`(OQAM), discrete wavelet multitone (DWMT) modulation, and
`orthogonal frequency division multiplexing (OFDM).
`Ex. 1001, 3:27-39.
`
`49. The ’158 patent specification also states that a “transceiver” may be a
`
`modem, such as a wireless modem that uses an air communication channel:
`
`The communication channel 18 provides a downstream
`transmission path from the DMT transmitter 22 to the remote
`receiver 34, and an upstream transmission path from the remote
`
`
`
`21
`
`DISH
`Exhibit 1009 Page 21
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`

`
`Declaration of Dr. Jose Tellado Under 37 C.F.R. § 1.68 in Support of
`Petition for Inter Partes Review of U.S. Patent No. 8,718,158
`
`transmitter 30 to the DMT receiver 26. In one embodiment, the
`communication channel 18 is a pair of twisted wires of a
`telephone
`subscriber
`line.
`In other embodiments,
`the
`communication channel 18 can be a fiber optic wire, a quad
`cable, consisting of two pairs of twisted wires, or a quad cable
`that is one of a star quad cable, a Dieselhorst-Martin quad
`cable, and the like. In a wireless communication system
`wherein the transceivers 10, 14 are wireless modems, the
`communication channel 18 is the air through which the
`transmission signal 38 travels between the transceivers 10, 14.
`Ex. 1001, 3:40-53.
`
`50. The ’158 patent specification also refers to transmitting data using a
`
`DMT modem:
`
`An input signal, which includes input data bits, is sent to a
`DMT trans