.
`l
`
`.
`
`p
`
`.
`
`‘
`\
`.
`
`'
`.
`
`fl
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
` 40999
`
`PATENT
`
`IN THE UNITED STATES PATENT AND TRADEMARK OFFICE
`
`In re Application of:
`
`Ernst Eberlein et a1.
`
`Group Art Unit: 2631
`
`Serial No.‘: 09/673,271
`
`Examiner: Bayard, Emmanuel
`
`Filed: ,November 29, 2000
`
`For: FRAME STRUCTURE AND FRAME
`
`SYNCHRONIZATION FOR MULTICARRIER :
`SYSTEMS
`‘
`
`AMENDMENT
`
`REC E IVE D
`
`JUN 0 8 2004
`
`Technology Center 2600
`
`Commissioner for PatentS
`PO. Box 1450
`
`Alexandria, VA 22313-1450
`
`Sir:
`
`In response to the Office Action dated March 5, 2004, please amend the above-
`
`identified application as follows:
`
`Amendments to the claims commence on page 2 herein; and
`
`Remarks commence on page 14 herein.
`
`Petitioner Sirius XM Radio Inc. - Ex; 1010, p. 1
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 1
`
`

`

`Appl. No. 09/673,27,
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`AMENDMENTS TO THE CLAIMS:
`
`.
`
`This listing of the claims will replace all prior versions, and listings, of claims in
`
`the application.
`
`47 .
`
`(Currently Amended) A method for generating a signal having a frame structure,
`
`each frame of said frame structure comprising at least one useful symbol, a guard'
`
`interval associated to said at least one useful symbol and a reference symbol, said
`
`method comprising the step of
`
`performing an amplitude modulation of a bit sequence, the envelope of the
`
`amplitude modulated bit sequence defining the reference pattern of said
`
`reference symbol; and
`
`inserting, in the time domain, the amplitude modulated bit sequence into said
`
`signal as said reference symbol.
`
`48.
`
`(Original) The method according to claim 47, wherein said signal is an
`
`orthogonal frequency division multiplexed signal.
`
`,
`
`49.
`
`(Original) The method according to claim 47, wherein said amplitude modulation
`
`is performed such that a mean amplitude of said reference symbol substantially
`
`corresponds to a mean amplitude of the remaining signal.
`
`50.
`
`(Currently Amended) A method for generating a multi—carrier modulated signal
`
`having a frame structure, each frame of said frame structure comprising at least
`
`one useful symbol, a guard interval associated to said at least one useful symbol
`
`and a reference symbol, said method comprising the steps of:
`
`providing a bitstream;
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 2
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 2
`
`

`

`Appl. No. 09/673,27,
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`.
`
`mapping bits of said bitstream to carriers in order to provide a sequence of
`
`spectra;
`
`performing an inverse Fourier transform in order to provide multi—carrier
`
`modulated symbols;
`
`associating a guard interval to each multi-carrier modulated symbol;
`
`generating said reference symbol by performing an amplitude modulation of a bit
`
`sequence, the envelope of the amplitude modulated bit sequence defining the
`
`reference pattern of said reference symbol;
`
`associating said reference symbol to a predetermined number of multi-carrier
`
`modulated symbols and associated guard intervals in order to define said frame;
`
`and
`
`inserting, in the time domain, said amplitude modulated bit sequence into said
`
`signal as said reference symbol.
`
`51.
`
`(Original) The method according to claim 50, wherein said multi—carrier
`
`modulated signal is an orthogonal frequency division multiplex signal.
`
`52.
`
`(Original) The method according to claim 50, wherein said amplitude modulation
`
`is performed such that a mean amplitude of said reference symbol substantially
`
`corresponds to a mean amplitude of the remaining multi-carrier modulated
`
`signal.
`
`53.
`
`(Original) The method according to claim 47, wherein said bit sequence is a
`
`pseudo random bit sequence having good autocorrelation characteristics.
`
`54.
`
`(Original) The method according to claim 47, wherein a number of useful
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 3
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 3
`
`

`

`Appl. No. 09/673,27,
`
`Amdt. Dated june 4, 2004
`Reply to Office Action of March 5, 2004
`
`.
`
`symbols in each frame is defined depending on channel properties of a channel
`
`through which the signal or the multi-carrier modulated signal is transmitted.
`
`55.
`
`(Currently Amended) A method for frame synchronization of a signal having a
`
`frame structure, each frame of said frame structure comprising at least one useful
`
`symbol, a guard interval associated with said at least one useful symbol and a
`
`reference symbol, said reference symbol comprising an amplitude modulated bit
`
`sequence, said method comprising the steps of:
`
`receiving said signal;
`
`down-converting said received signal;
`
`
`in the time domain performing an amplitude-demodulation of said down—
`
`converted signal in order to generate an envelope;
`
`
`1n the time domain correlating said envelope with a predetermined reference
`
`pattern in order to detect the signal reference pattern of said reference symbol in
`
`said signal; and
`
`performing said frame synchronization based on the detection of said signal
`
`reference pattern.
`
`56.
`
`(Original) The method according to claim 55, further comprising the step of
`
`performing a fast automatic gain control of said received down-converted signal
`
`prior to the step of performing said amplitude-demodulation.
`
`57.
`
`(Original) The method according to claim 55, wherein the step of performing
`
`said amplitude-demoduladon comprises the step of calculating an amplitude of
`
`said signal using the alphamfl+ betamin. method.
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 4
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 4
`
`

`

`Appl. No. 09/673,279
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`.
`
`58.
`
`(Original) The method according to claim 55, further comprising the steps of
`
`sampling respective amplitudes of said received down-converted signal and
`
`comparing said sampled amplitudes with a predetermined threshold in order to
`
`generate a bit sequence in order to perform said amplitude demodulation.
`
`59.
`
`(Original) The method according to claim 58, wherein the step of sampling
`
`respective amplitudes of said received down-converted signal further comprises
`
`the step of performing an over—sampling of said received down-converted signal.
`
`60.
`
`(Original) The method according to claim 55, further comprising the step of
`
`applying a result of the frame synchronization for a frame in said signal to at least
`
`one subsequent frame in said signal.
`
`61.
`
`(Currently Amended) A method for frame synchronization of a multi-carrier
`
`modulated signal having frame structure, each frame of said frame structure
`
`comprising at least one useful symbol, a guard interval associated to said at least
`
`one useful symbol and a reference symbol, said reference symbol comprising an
`
`amplitude modulated bit sequence, said method comprising the steps of:
`
`receiving said multi—carrier modulated signal;
`
`down-converting said received multi-carrier modulated signal;
`
`in the time domain, performing an amplitude-demodulation of said down—
`
`converted multi-carrier modulated signal in order to generate an envelope;
`
`
`in the time domain correlating said envelope with a predetermined reference
`
`pattern in order to detect the signal reference pattern of said reference symbol in
`
`said multi—carrier modulated signal;
`
`performing said frame synchronization based on the detection of said signal
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 5
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 5
`
`

`

`Appl. No. 09/673,27’
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`.
`
`reference pattern;
`
`extracting said reference symbol and said at least one guard interval from said
`
`down—converted received multi—carrier modulated signal based on said frame
`
`synchronization;
`
`performing a Fourier transform in order to provide a sequence of spectra from
`
`said at least one useful symbol; and
`
`de-mapping said sequence of spectra in order to provide a bitstream.
`
`62.
`
`(Original) The method according to claim 61, further comprising the step of
`
`performing a fast automatic gain control of said received down-converted multi—
`
`carrier modulated signal prior to the step of performing said amplitude-
`
`demodulation.
`
`63.
`
`(Original) The method according to claim 61, wherein the step of performing
`
`said amplitude-demodulation comprises the step of calculating an amplitude of
`
`said multi—carrier modulated signal using the alphamzm betamin. method.
`
`64.
`
`(Original) The method according to claim 61, further comprising the steps of
`
`sampling respective amplitudes of said received down—converted multi-carrier
`
`modulated signal and comparing said sampled amplitudes with a predetermined
`
`threshold in order to generate a bit sequence in order to perform said amplitude
`
`demodulation.
`
`65.
`
`(Original) The method according to claim 64, wherein the step of sampling
`
`respective amplitudes of said received down—converted multi-carrier modulated
`
`signal further comprises the step of performing an over-sampling of said received
`
`down—converted multi-carrier modulated signal.
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 6
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 6
`
`

`

`Appl. No. 09/673,271.
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`66.
`
`67.
`
`68.
`
`69.
`
`70.
`
`(Currently Amended) The method according to claim 6154-, further comprising
`
`the step of applying a result of the frame synchronization for a frame in said
`
`signal to at least one subsequent frame in said multi-carrier modulated signal.
`
`(Original) The method according to claim 55, further comprising the step of
`
`detecting a location of said signal reference pattern based on an occurrence of a
`
`maximum of a correlation signal when correlating said envelope with said
`
`predetermined reference pattern.
`
`(Currently Amended) The method according to claim @517- further comprising
`
`the steps of:
`
`weighting a plurality of maxima of said correlation signal such that a maximum
`
`occurring first is weighted stronger than any subsequently occurring maximum;
`
`and
`
`detecting said location of said signal reference pattern based on the greatest one
`
`of said weighted maxima.
`
`(Original) The method according to claim 68, further comprising the step of:
`
`disabling the step of performing said frame synchronization for a predetermined
`
`period of time after having switched-on a receiver performing said method for
`
`frame synchronization.
`
`(Currently Amended) An apparatus for generating a signal having a frame
`
`structure, each frame of said frame structure comprising at least one useful
`
`symbol, a guard interval associated to said at least one useful symbol and a
`
`reference symbol, said apparatus comprising:
`
`an amplitude modulator for performing an amplitude modulation of a bit
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 7
`
`—,;.,
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 7
`
`

`

`Appl. No. 09/673,27,
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`sequence, the envelope of the amplitude modulated bit sequence defining the
`
`reference pattern of said reference symbol; and
`
`means for inserting, in the time domain, the amplitude modulated bit sequence
`
`into said signal as said reference symbol (16).
`
`71.
`
`(Original) The apparatus according to claim 70, wherein said signal is an
`
`orthogonal frequency division multiplexed signal.
`
`72.
`
`(Original) The apparatus according to claim 70, wherein a mean amplitude of
`
`said reference symbol substantially corresponds to a mean amplitude of the
`
`remaining signal.
`
`73.
`
`(Currently Amended) An apparatus for generating a multi-carrier modulated
`
`signal having a frame structure, each frame of said frame structure comprising at
`
`least one useful symbol, a guard interval associated to said at least one useful
`
`symbol and a reference symbol, said apparatus comprising:
`
`means for providing a bitstream;
`
`means for mapping bits of said bitstream to carriers in order to provide a
`
`sequence of spectra;
`
`means for performing an inverse Fourier transform in order to provide multi-
`
`carrier modulated symbols;
`
`means for associating a guard interval to each multi—carrier modulated symbol;
`
`means for generating said reference symbol comprising an amplitude modulator
`
`for performing an amplitude modulation of a bit sequence, the envelope of the
`
`amplitude modulated bit sequence defining the reference pattern of said
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 8
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 8
`
`

`

`Appl. No. 09/673,27.
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`reference symbol;
`
`means for associating said reference symbol to a predetermined number of multi—
`
`carrier modulated symbols and associated guard intervals in order to define said
`
`frame; and
`
`means for inserting, in the time domain, the amplitude modulated bit sequence
`
`into said signal as said reference symbol.
`
`(Original) The apparatus according to claim 73, wherein said multi-carrier
`
`modulated signal is an orthogonal frequency division multiplex signal.
`
`(Original) The apparatus according to claim 72, wherein said means for
`
`generating said reference symbol performs the amplitude modulation such that a
`
`mean amplitude of said reference symbol substantially corresponds to a mean
`
`amplitude of the remaining multi-carrier modulated signal.
`
`(Original) The apparatus according to claim 70, wherein said means for
`
`generating said reference symbol generates a pseudo random bit sequence having
`
`good autocorrelauon characteristics as said bit sequence.
`
`(Original) The apparatus according to claim 70, comprising means
`
`for
`
`determining a number of useful symbols in each frame depending on channel
`
`properties of a channel through which the signal or the multi—carrier modulated
`
`signal is transmitted.
`
`(Currently Amended) An apparatus for frame synchronization of a signal having
`
`a frame structure, each frame of said frame structure comprising at least one
`
`useful symbol, a guard interval associated to said at least one useful symbol and a
`
`reference symbol, said reference symbol comprising an amplitude modulated bit
`
`seguence, said apparatus comprising:
`
`74.
`
`75.
`
`76.
`
`77.
`
`78.
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 9
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 9
`
`

`

`Appl. No. 09/673,27.
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`receiving means for receiving said signal;
`
`a down-converter for down-converting said received signal;
`
`an amplitude-demodulator for performing,
`
`in the time domain, an amplitude
`
`demodulation of said down-converted signal in order to generate an envelope;
`
`a correlator for correlating, in the time domain, said envelope with a predeter-
`
`mined reference pattern in order to detect the signal reference pattern of said
`
`reference symbol in said signal; and
`
`means for performing said frame synchronization based on the detection of said
`
`signal reference pattern.
`
`79.
`
`(Original) The apparatus according to claim 78, further comprising means for
`
`performing a fast automatic gain control of said received down-converted signal
`
`preceding said amplitude—demodulator.
`
`80.
`
`(Original) The apparatus according to claim 78, wherein said amplitude—
`
`demodulator comprises means for calculating an amplitude of said signal using
`
`the alphamu+ betamin. method.
`
`81.
`
`(Original) The apparatus according to claim 78, further comprising means for
`
`sampling respective amplitudes of said received down—converted signal, wherein
`
`said amplitude-demodulator comprises means
`
`for comparing said sampled
`
`amplitudes with a predetermined threshold in order to generate a bit sequence.
`
`82.
`
`(Original) The apparatus according to claim 81, wherein said means for sampling
`
`comprises means for over—sampling said received down—converted signal.
`
`-10-
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 10
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 10
`
`

`

`Appl. No. 09/673,2”,
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`83.
`
`(Original) The apparatus according to claim 78, further comprising means for
`
`applying a result of the frame synchronization for a frame in said signal to at least
`
`one subsequent frame in said signal.
`
`84.
`
`(Currently Amended) An apparatus for frame synchronization of a multi-carrier
`
`modulated signal having a frame structure, each frame of said frame structure
`
`comprising at least one useful symbol, a guard interval associated to said at least
`
`one useful symbol and a reference symbol, said reference symbol comprising an
`
`amplitude modulated bit sequence, said apparatus comprising:
`
`a receiver for receiving said multi—carrier modulated signal;
`
`a down-converter for down-converting said received multi-carrier modulated
`
`signal;
`
`an amplitude-demodulator for performing, in the time domain, an amplitude-
`
`demodulation of said down-converted multi-carrier modulated signal in order to
`
`generate an envelope;
`
`a correlator
`
`for correlating,
`
`in the time domain,
`
`said envelope with a
`
`predetermined reference pattern in order to detect the signal reference pattern of
`
`said reference symbol in said multi-carrier modulated signal;
`
`means for performing said frame synchronization based on the detection of said
`
`signal reference pattern;
`
`means for extracting said reference symbol and said at least one guard interval
`
`from said down—converted received multi—carrier modulated signal based on said
`
`frame synchronization in order to generate said at least one useful symbol;
`
`means for performing a Fourier transform in order to provide a sequence of
`
`-11-
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 11
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 11
`
`

`

`Appl. No. 09/673,27.
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`spectra from said at least one useful symbol; and
`
`means for de-mapping said sequence of spectra in order to provide a bitstream.
`
`85.
`
`(Original) The apparatus according to claim 84, further comprising means for
`
`performing a fast automatic gain control of said received down-converted multi—
`
`carrier modulated signal preceding said amplitude-demodulator.
`
`86.
`
`(Original) The apparatus according to claim 84, wherein said amplitude-
`
`demodulator comprises means for calculating an amplitude of said multi-carrier
`
`@k
`
`0
`
`J
`
`87.
`
`modulated signal using the alphamim betamgn. method.
`
`(Original)The apparatusaccordingtoclaim84,furthercomprisingmeans for
`
`sampling respective amplitudes of said received down—converted multi—carrier
`
`modulated signal, wherein said amplitude-demodulator comprises means for
`
`comparing said sampled amplitudes with a predetermined threshold in order to
`
`generate a bit sequence.
`
`88.
`
`(Original) The apparatus according to claim 87, wherein said means for sampling
`
`comprises means for over—sampling said received down-converted multi-carrier
`
`modulated signal.
`
`89.
`
`(Original) The apparatus according to claim 84, further comprising means for
`
`applying a result of the frame synchronization for a frame in said multi—carrier
`
`modulated signal to at least one subsequent frame in said multi-carrier modulated
`
`signal.
`
`90.
`
`(Original) The apparatus according to claim 78, further comprising means for
`
`detecting a location of said signal reference pattern based on an occurrence of a
`
`maximum of a correlation signal output of said correlator.
`
`-12-
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 12
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 12
`
`

`

`Appl. No. 09/673,27.
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`91.
`
`(Original) The apparatus according to claim 90, further comprising means for
`
`weighting a plurality of maxima of said correlation signal such that a maximum
`
`occurring first is weighted stronger than any subsequently occurring maximum;
`
`and
`
`means for detecting said location of said signal reference pattern based on the
`
`6
`
`greatest one of said weighted maxima.
`
`92.
`
`(Original) The apparatus according to claim 91, further comprising means for
`
`disabling said means for performing said frame synchronization for a
`
`predetermined period of time after having switched-on a receiver comprising said
`
`apparatus for frame synchronization.
`W
`
`-13-
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 13
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 13
`
`

`

`Appl. No. 09/673,27,
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`REMARKS
`
`Reconsideration
`
`and allowance of
`
`the
`
`above-identified application
`
`are
`
`respectfully requested. Upon entry of this Amendment, claims 47—92 will be pending.
`
`Claims 66 and 68 are amended herein to correct typographical errors. Claims 47, 50, 55,
`
`61, 70, 73, 78 and 84 are amended herein as described below.
`
`In the Office Action, claims 47-54 and 70-77 are rejected under 35 U.S.C. §103(a)
`
`as being obvious over U.S. Patent No. 5,694,389, to Seki et al (hereinafter Seki et al ‘389
`
`patent), in view of U.S. Patent No. 5,771,224, to Seki et al (hereinafter Seki et al ‘224
`
`patent).
`
`Claims 55—60 and 78-83 are rejected under 35 U.S.C. §102(e) as being
`
`anticipated by the Seki et al ‘389 patent. Finally, claims 61-69 and 84-92 are rejected
`
`under 35 U.S.C. §103(a) as being obvious over U.S. Patent No. 5,646,935, to Ishikawa et
`
`a1 (hereinafter the Ishikawa et al patent), in view of the Seki et al ‘389 patent). The
`
`Applicants respectfully traverse each of these claim rejections.
`
`The present invention relates to signals having a frame structure and a frame
`
`synchronization of such signals. The signal comprises a reference symbol and, according
`
`to the present invention, the reference symbol is formed by performing an amplitude
`
`modulation of a bit sequence and inserting the amplitude—modulated bit sequence into
`
`the signal. As can be seen from Fig. 2 of the present application, for example,
`
`the
`
`amplitude-modulated bit sequence is inserted at 116 and therefore after conducting the
`
`inverse fast Fourier transform 110 such that the reference symbol is inserted in the time
`
`domain. At the receiver’s end, the received signal is down-converted, an amplitude
`
`demodulation of the down-converted signal
`
`is performed in order to generate an
`
`envelope, and the envelope is correlated with a predetermined reference pattern in order
`
`to detect the signal reference pattern of the reference symbol in the signal. Then, frame
`
`synchronization is performed based on the detection of the signal reference pattern. As
`
`can be seen from Fig. 2 of the present application, the frame synchronization unit 134 is
`
`arranged upstream of the fast Fourier transform unit 140. Thus, according to the
`
`invention, the frame synchronization is conducted in the time domain.
`
`As described on page 13, lines 4-32 of the present application as filed, the present
`
`invention permits for finding frame headers independently of other synchronization
`
`information and,
`
`thus, for positioning the fast Fourier transform windows correctly.
`
`-14-
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 14
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 14
`
`

`

`Appl. No. 09/673,27.
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`Thus, according to the present invention, the frame synchronization will be performed as
`
`the first synchronization task. Synchronization to the reference symbol, i.e. the frame
`
`header, is the first step to initiate radio reception. The reference symbol of the present
`
`invention is structured to accomplish this. Information contained in the reference symbol
`
`must therefore be independent of other synchronization parameters, e.g., the frequency.
`
`For this reason, in accordance with the present invention, the form of the reference
`
`symbol selected is an amplitude-modulated sequence in the complex base band. The
`
`information sequence is preferably selected in a way which makes it easy and secure to
`
`find it in the time domain.
`
`As described on page 16, lines 1—20 of the present application as filed, the present
`
`invention shows how to find a reference symbol by a detection method which is simple.
`
`The synchronization methods according to the present invention are independent of
`
`other synchronization steps. If the information needed for the synchronization is
`
`contained in the envelope of the preamble,
`
`i.e.
`
`the reference symbol,
`
`the reference
`
`symbol is independent of possible frequency offsets. Thus, a derivation of the correct
`
`downsampling timing and the correct positioning of the FFT window can be achieved.
`
`The reference symbol of the present invention can be detected even if the frequency
`
`synchronization loop is not yet locked or even in the case of a barrier frequency offset.
`
`The frame synchronization method in accordance with the present
`
`invention is
`
`preferably performed prior to other and without knowledge of other synchronization
`
`efforts.
`
`With regard to the rejection of claims 47—54 and 70-77 under 35 U.S.C. §103(a) in
`
`view of the Seki et al ‘389 patent in combination with the Seki et al ‘224 patent, the
`
`independent claims 47, 50, 70 and 73, as amended herein, each recite a frame structure
`
`wherein each frame has a reference symbol inserted therein in the time domain and as an
`
`amplitude modulated bit sequence. Neither the Seki et al ‘389 patent nor the Seki et al
`
`‘224 patent singly, or in combination, teaches or suggests these aspects of the claimed
`
`invention, among other aspects.
`
`According to the Seki et al ‘389 patent, a frequency reference symbol is used in
`
`order to detect the carrier frequency offset based on an offset pf the position of decoded
`
`data of the frequency reference symbol (see column 4, lines 32 to 36). The structure of
`
`-15-
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 15
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 15
`
`

`

`Appl. No. 09/673,279
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`.
`
`the reference symbol according to the Seki et al
`
`‘389 patent
`
`is described making
`
`reference to Fig. 3 thereof, i.e., on column 4, line 58 to column 5, line 41. According to
`
`the Seki et al ‘389 patent, one OFDM symbol consists of N carrier positions wherein the
`
`middle in carrier positions are frequency reference carrier positions for frequency
`
`references. With respect to the m frequency reference carrier positions carriers, carriers
`
`are arranged in a pattern of an M sequence (pseudonoise code), wherein no carriers are
`
`present when the code is “0” and carriers are present when the code is “1”. Thus,
`
`according to the Seki et al ‘389 patent, carriers are present or not depending on the
`
`pseudonoise code. Thus, the carriers are modulated making use of the pseudonoise code,
`
`which does not teach or suggest amplitude modulation of a bit sequence and insertion of
`
`the amplitude modulated bit sequence into a signal, as recited in the independent claims
`
`47, 50, 70 and 73 of the present application.
`
`Moreover, according to the Seki et al ‘389 patent, the reference symbol generator
`
`206 is provided upstream of the IFFT circuit 208, so that the reference symbol is inserted
`
`in the frequency domain. To more clearly emphasize this difference in the independent
`
`claims 47, 50, 70 and 73, the amended independent claims 47, 50, 70 and 73 recite that
`
`the amplitude-modulated bit sequence is inserted into said signal in the time domain.
`
`According to the Seki et al ‘224 patent, a reference symbol is inserted in the
`
`frequency domain and the steps of evaluating the reference symbol are also conducted in
`
`the frequency domain. Thus, there is no suggestion or motivation to combine the Seki et
`
`al ‘389 patent and the Seki et al ‘224 patent or to modify the systems disclosed therein to
`
`render obvious the present invention recited in the amended independent claims 47, 50,
`
`70 and 73. Accordingly, withdrawal of the rejection of claims 47-54 and 70-77 under 35
`
`U.S.C. §103(a) in view of the Seki et al ‘389 patent in combination with the Seki et al ‘224
`
`patent is believed to be proper and is respectfully requested.
`
`With regard to the rejection of claims 55-60 and 78—83 under 35 U.S.C. §102(e) as
`
`being anticipated by the Seki et al ‘389 patent, independent claims 55 and 78 are directed
`
`to frame synchronization making use of such a reference symbol as described above.
`
`According to the Seki et al ‘389 patent, the reference symbols are used for detecting a
`
`carrier
`
`frequency offset,
`
`rather
`
`than for
`
`frame synchronization. Concerning this,
`
`reference is made to column 4, lines 35 to 39 and claim 1 of the Seki et al ‘389 patent.
`
`-16-
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 16
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 16
`
`

`

`Appl. No. 09/673,27.
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`Moreover, according to the Seki et al ‘389 patent,
`
`the amplitude detector and the
`
`correlator are provided downstream of the fast Fourier transform circuit 304 and
`
`therefore, the amplitude detection and the correlation are conducted in the frequency
`
`domain. Thus, in order to more clearly distinguish the present invention recited in
`
`claims 55-60 and 78-83 of the present application from the disclosure of the Seki et al
`
`‘389 patent, independent claims 55 and 78 are amended herein to recite that amplitude
`
`demodulation and correlating are performed in the time domain.
`
`In addition,
`
`independent claims 55 and 78 are amended herein to recite that the reference symbol
`
`comprises an amplitude-modulated bit sequence. Thus, withdrawal of the rejection of
`
`claims 55-60 and 78—83 under 35 U.S.C. §102(e)
`
`is believed to be proper and is
`
`respectfully requested.
`
`Finally, with regard to the rejection of claims 61-69 and 84—92 under 35 U.S.C.
`
`§103(a) in View of the Ishikawa et a1 patent and the Seki et al ‘389 patent, independent
`
`claims 61 and 84 are also amended herein to recite that amplitude demodulation and
`
`correlating are performed in the time domain. In addition, independent claims 61 and 84
`
`are amended herein to recite that
`
`the reference symbol comprises an amplitude—
`
`modulated bit sequence. Neither Ishikawa et al patent nor the Seki et al ‘389 patent
`
`singly, or in combination, teaches or suggests these aspects of the claimed invention,
`
`among other aspects.
`
`The Office Action refers to Fig. 3 of the Ishikawa et a1 patent to purportedly
`
`teach frame synchronization as recited in claims 61 and 84, except for correlating an
`
`envelope with a predetermined reference pattern in order to detect the signal reference
`
`pattern of a reference signal in a multi-carrier modulated signal. The Office Action relies
`
`on the Seki et al ‘389 patent to overcome this deficiency. As stated above, however, the
`
`amplitude detector and the correlator in the Seki et al
`
`‘389 patent are provided
`
`downstream of the fast Fourier transform circuit 304; therefore, the amplitude detection
`
`and the correlation are conducted in the frequency domain.
`
`In addition, the reference
`
`symbols described in the Seki et al ‘389 patent are used for detecting a carrier frequency
`
`offset and not for frame synchronization. Accordingly, withdrawal of the rejection of
`
`claims 61-69 and 84-92 under 35 U.S.C. §103(a)
`
`is believed to be proper and is
`
`respectfully requested.
`
`-17-
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 17
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 17
`
`

`

`Appl. No. 09/673,279
`
`Amdt. Dated June 4, 2004
`Reply to Office Action of March 5, 2004
`
`.
`
`In view of the above, it is believed that
`
`the application is in condition for
`
`allowance and notice to this effect is respectfully requested. Should the Examiner have
`
`any questions,
`
`the Examiner is invited to contact the undersigned at the telephone
`
`number indicated below.
`
`Respectfully submitted,
`
`
`
`Attorney for Applicant
`Reg. No. 33,952
`
`Roylance, Abrams, Berdo & Goodman, L.L.P.
`1300 19th Street, N.W., Suite 600
`
`Washington, DC. 20036
`(202) 659-9076
`
`Dated:
`
`Ll
`
`_§ ”1% g
`
`,2004
`
`-18-
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 18
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 18
`
`

`

`Appl. No. 09/673,271
`Amdt. Dated December 26, 2004
`
`Reply to Office Action of August 24, 2004
`
`
`
`m
`
`: Group A11 Unit: 2631
`
`Serial No.: 09/673,271
`
`: Examiner: Bayard, Emmanuel
`
`Filed: November 28, 2000
`
`:
`For: FRAME STRUCTURE AND FRAME
`SYNCHRONIZATION FOR MULTICARRIER :
`SYSTEMS
`'
`
`AMENDMENT
`
`Commissioner for Patents
`PO. Box 1450
`
`Alexandria, VA 22313—1450
`
`Sir:
`
`In response to the Office Action dated August 24, 2004, please amend the
`
`above—identified application as follows:
`
`Amendments to the claims commence on page 2 herein; and
`
`Remarks commence on page 15 herein.
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 19
`
`Petitioner Sirius XM Radio Inc. - Ex. 1010, p. 19
`
`

`

`0
`
`Appl. No. 09/673,271
`Amdt. Dated December 26, 2004
`
`Reply to Office Action of August 24, 2004
`
`AME