(12) United States Patent
`Sorrells et al.
`
`US006266518B1
`US 6,266,518 B1
`*Jul. 24, 2001
`
`(10) Patent N0.:
`(45) Date of Patent:
`
`(54) METHOD AND SYSTEM FOR
`DOWN-CONVERTING ELECTROMAGNETIC
`SIGNALS BY SAMPLING AND
`INTEGRATING OVER APERTURES
`
`(75) Inventors: David F. Sorrells; Michael J.
`Bultman, both of Jacksonville; Robert
`W. Cook, Switzerland; Richard C.
`Looke; Charley D. Moses, Jr., both of
`Jacksonville, all of FL (US)
`
`(73) Assignee: ParkerVision, Inc., Jacksonville, FL
`(Us)
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 0 days.
`
`( * ) Notice:
`
`This patent is subject to a terminal dis
`claimer.
`
`(21) Appl. No.: 09/376,359
`(22) Filed:
`Aug. 18, 1999
`
`Related US. Application Data
`
`(63) Continuation of application No. 09/176,022, ?led on Oct.
`21, 1998.
`
`(51) Int. Cl.7 ................................................... .. H01Q 11/12
`(52) US. Cl. ........................................... .. 455/118; 455/113
`(58) Field of Search ................................... .. 455/131, 139,
`455/142, 182.1, 202, 205, 713, 317, 318,
`323, 118, 113, 324; 329/345, 347; 327/9,
`91; 702/66, 70
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
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`OTHER PUBLICATIONS
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`Translation of Speci?cation and Claims of FR Patent No.
`2245130, 3 pages.
`Aghvami, H. et al., “Land Mobile Satellites Using the
`Highly Elliptic Orbits—The UK T—SAT Mobile Payload,”
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`Primary Examiner—Vivian Chang
`Assistant Examiner—Sam Bhattacharya
`(74) Attorney, Agent, or Firm—Sterne, Kessler, Goldstein
`& Fox PLLC
`(57)
`
`ABSTRACT
`
`Methods, systems, and apparatuses for down-converting an
`electromagnetic (EM) signal by aliasing the EM signal are
`described herein. Brie?y stated, such methods, systems, and
`apparatuses operate by receiving an EM signal and an
`aliasing signal having an aliasing rate. The EM signal is
`aliased according to the aliasing signal to doWn-convert the
`EM signal. The term aliasing, as used herein, refers to both
`down-converting an EM signal by under-sampling the EM
`signal at an aliasing rate, and down-converting an EM signal
`by transferring energy from the EM signal at the aliasing
`rate. In an embodiment, the EM signal is down-converted to
`an intermediate frequency (IF) signal. In another
`embodiment, the EM signal is down-converted to a demodu
`lated baseband information signal. In another embodiment,
`the EM signal is a frequency modulated (FM) signal, Which
`is down-converted to a non-FM signal, such as a phase
`
`modulated (PM) signal or an amplitude modulated signal.
`
`(List continued on neXt page.)
`
`99 Claims, 126 Drawing Sheets
`
`1201 \
`RECEIVING AN EN SIGNAL
`
`RECEIVING AN ALIASING SIGNAL
`HAVING AN ALIASING RATE
`
`I“ 1202
`
`1204
`
`DOWN-CONVERTING THE EM SIGNAL P1205
`
`GENERIC DOWN-CONVERTING
`FLOWCHAHT
`
`RPX-Farmwald Ex. 1002, p 1
`
`

`

`US 6,266,518 B1
`Page 2
`
`U.S. PATENT DOCUMENTS
`
`7
`7
`5723728
`2,462,069
`2,462,181
`2,472,798
`
`
`gObCItS ............................. a‘? ~~~~~~ ~~
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`2/1949 Chatterjea eta.
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`-
`1281/;
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`. 250/17
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`4,370,572
`4,389,579
`
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`
`2/1984 1361116161. ........................ .. 333/165
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`'
`'
`9/1984 Kasuga ~~~~~~ --
`
`'
`~364/718
`
`
`
`274977859 274997279
`
`
`
`Boughtwood et a ' Paterson _______ ~~
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`
`
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`
`
`
`4,479,226 4,481,490
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`
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`3,226,643
`3,258,694
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`4,081,748
`4,130,765
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`4,142,155
`4,170,764
`4,204,171
`4,210,872
`4,245,355
`4,253,066
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`4,253,069
`4,308,614
`4,320,361
`4,320,536
`4,346,477
`4,355,401
`4,356,558
`4,360,867
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`4,577,157
`4,583,239
`4,591,736
`4,602,220
`4,603,300
`4,612,464
`4,612,518
`4,616,191
`4,621,217
`4,628,517
`4,634,998
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`4,651,034
`4,675,882
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`4,716,376
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`4,757,538
`4,768,187
`4,769,612
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`4,791,584
`4,801,823
`4,806,790
`4,810,904
`4,810,976
`4,811,362
`4,816,704
`4,819,252
`4,833,445
`4,841,265
`4,862,121
`4,868,654
`4,870,659
`4,871,987
`4,885,587
`4,885,756
`4,888,557
`4,890,302
`4,893,316
`4,893,341
`4,894,766
`4,896,152
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`
`RPX-Farmwald Ex. 1002, p 2
`
`

`

`US 6,266,518 B1
`Page 3
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`4,944,025
`4,955,079
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`4,970,703
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`5,003,621
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`5,006,810
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`5,015,963
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`5,020,149
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`5,052,050
`5,065,409
`5,083,050
`5,091,921
`5,095,533
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`5,111,152
`5,113,094
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`5,122,765
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`5,151,661
`5,159,710
`5,170,414
`5,172,070
`5,191,459
`5,204,642
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`5,214,787
`5,220,583
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`5,230,097
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`5,241,561
`5,249,203
`5,251,218
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`5,260,970
`5,263,194
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`5,282,023
`5,287,516
`5,293,398
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`5,375,146
`5,379,040
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`5,388,063
`5,390,364
`5,400,084
`5,404,127
`
`5,410,541
`5,410,743
`5,412,352
`5,416,803
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`5,423,082
`5,428,638
`5,428,640
`5,434,546
`5,438,692
`5,444,415
`5,444,416
`5,444,865
`5,446,421
`5,446,422
`5,448,602
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`5,454,007
`5,454,009
`5,463,356
`5,463,357
`5,465,071
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`5,471,162
`5,479,120
`5,479,447
`5,483,193
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`5,483,691
`5,490,173
`5,493,581
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`5,495,200
`5,495,202
`5,495,500
`5,499,267
`5,500,758
`5,515,014
`5,517,688
`5,519,890
`5,523,719
`5,523,726
`5,523,760
`5,539,770
`5,555,453
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`5,574,755
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`5,584,068
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`

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`US 6,266,518 B1
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`H04N/7/01
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`7/1991 (EP) ..
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`0 411 840A3
`5/1992 (EP) ..
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`H04N/9/64
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`6/1993 (EP) ..
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`0 512 748A3
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`0 560 228 A1
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`H03D/7/12
`0 632 288A2
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`0 411 840 B1
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`G01R/33/36
`0 696 854 A1
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`H04B/1/26
`0 632 288A3
`7/1996 (EP) ..
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`0 486 095 B1
`2/1997 (EP) ..
`H03D/3/00
`0 782 275A2
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`H04B/7/02
`0 785 635 A1
`7/1997 (EP) ..
`. H04B/1/713
`0 795 978A2
`9/1997 (EP) ..
`H04L/5/06
`0 837 565 A1
`4/1998 (EP) ..
`H04B/1/69
`0 862 274 A1
`9/1998 (EP) ............................. .. H03M/1/06
`0 874 499A2 10/1998 (EP) ............................ .. H04L/25/06
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`2/1996 (W0) ............................ .. H04B/1/26
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`12/1996 (WO) ............................ .. H04B/1/26
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