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DE68921265D1 - Mehrfache Wiederverwendung eines FM-Bandes. - Google Patents

Mehrfache Wiederverwendung eines FM-Bandes.

Info

Publication number
DE68921265D1
DE68921265D1 DE68921265T DE68921265T DE68921265D1 DE 68921265 D1 DE68921265 D1 DE 68921265D1 DE 68921265 T DE68921265 T DE 68921265T DE 68921265 T DE68921265 T DE 68921265T DE 68921265 D1 DE68921265 D1 DE 68921265D1
Authority
DE
Germany
Prior art keywords
band
multiple reuse
reuse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE68921265T
Other languages
English (en)
Other versions
DE68921265T2 (de
Inventor
Glen A Myers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/232,691 external-priority patent/US4859958A/en
Application filed by Individual filed Critical Individual
Publication of DE68921265D1 publication Critical patent/DE68921265D1/de
Application granted granted Critical
Publication of DE68921265T2 publication Critical patent/DE68921265T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/24—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits
    • H03D3/241—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop
    • H03D3/248—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop with means for eliminating interfering signals, e.g. by multiple phase locked loops

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Circuits Of Receivers In General (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
DE68921265T 1988-08-16 1989-08-14 Mehrfache Wiederverwendung eines FM-Bandes. Expired - Fee Related DE68921265T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/232,691 US4859958A (en) 1988-08-16 1988-08-16 Multiple reuse of an FM band
US07/352,400 US4992747A (en) 1988-08-16 1989-05-15 Multiple reuse of an FM band

Publications (2)

Publication Number Publication Date
DE68921265D1 true DE68921265D1 (de) 1995-03-30
DE68921265T2 DE68921265T2 (de) 1995-11-02

Family

ID=26926227

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68921265T Expired - Fee Related DE68921265T2 (de) 1988-08-16 1989-08-14 Mehrfache Wiederverwendung eines FM-Bandes.

Country Status (8)

Country Link
US (1) US4992747A (de)
EP (1) EP0356096B1 (de)
JP (1) JPH04503738A (de)
KR (1) KR900702640A (de)
CN (1) CN1018317B (de)
CA (1) CA1332961C (de)
DE (1) DE68921265T2 (de)
WO (1) WO1990002445A1 (de)

Families Citing this family (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0770925B2 (ja) * 1989-05-16 1995-07-31 三洋電機株式会社 Ｆｍ復調回路
DE4038405A1 (de) * 1990-12-01 1992-06-11 Gustav Dr Ing Heinzmann Verfahren und schaltungsanordnung zum aussieben des unteren einen oder des oberen anderen seitenbands einer auszuwertenden zweiseitenbandschwingung aus einem gemisch mehrerer sich gegenseitig stoerender zweiseitenbandschwingungen in fernmeldeanlagen, insbesondere in kurzwellen-vielkanal-funkfernsprechanlagen und in kurzwellen-rundfunkanlagen
US5291125A (en) * 1992-09-14 1994-03-01 The United States Of America As Represented By The Secretary Of The Air Force Instantaneous frequency measurement (IFM) receiver with two signal capability
US5329242A (en) * 1992-10-22 1994-07-12 Myers Glen A Method and apparatus for signal demodulation using time-intervals
US5606581A (en) * 1994-03-17 1997-02-25 Myers; Glen A. Method and apparatus for the cancellation of interference in electrical systems
US5697086A (en) * 1994-04-15 1997-12-09 Gte Government Systems Corporation Co-channel FM signal/interference canceller
US5615411A (en) * 1994-04-22 1997-03-25 Rockwell International Method and apparatus for composite signal separation and FM demodulation
US5610950A (en) * 1994-10-31 1997-03-11 Motorola, Inc. Communication device with reduced sensitivity to in-channel interference
US5554955A (en) * 1995-08-28 1996-09-10 Myers; Glen A. Method and apparatus for removing the effects of co-channel interference from the message on a dominant frequency modulated carrier and for recovering the message from each of two co-channel carriers
US5995567A (en) * 1996-04-19 1999-11-30 Texas Instruments Incorporated Radio frequency noise canceller
US5878084A (en) * 1996-08-30 1999-03-02 Myers; Glen A. Method and apparatus for recovering the independent bit streams from each of two co-channel frequency modulated carriers
US6233254B1 (en) 1997-06-06 2001-05-15 Glen A. Myers Use of feature characteristics including times of occurrence to represent independent bit streams or groups of bits in data transmission systems
JP3576795B2 (ja) * 1998-03-13 2004-10-13 株式会社ケンウッド Ａｍ隣接妨害除去回路
JP3206550B2 (ja) 1998-05-11 2001-09-10 日本電気株式会社 位相同期ループ付き信号推定器
US6807405B1 (en) 1999-04-28 2004-10-19 Isco International, Inc. Method and a device for maintaining the performance quality of a code-division multiple access system in the presence of narrow band interference
US6959206B2 (en) * 2001-03-16 2005-10-25 Isco International, Inc. Dual-duplexed, tower-top front-end for a radio transceiver system
US7173981B1 (en) * 2001-04-27 2007-02-06 The Directv Group, Inc. Dual layer signal processing in a layered modulation digital signal system
US7209524B2 (en) * 2001-04-27 2007-04-24 The Directv Group, Inc. Layered modulation for digital signals
US7423987B2 (en) 2001-04-27 2008-09-09 The Directv Group, Inc. Feeder link configurations to support layered modulation for digital signals
US7184473B2 (en) 2001-04-27 2007-02-27 The Directv Group, Inc. Equalizers for layered modulated and other signals
US7583728B2 (en) 2002-10-25 2009-09-01 The Directv Group, Inc. Equalizers for layered modulated and other signals
US7822154B2 (en) 2001-04-27 2010-10-26 The Directv Group, Inc. Signal, interference and noise power measurement
US7151807B2 (en) 2001-04-27 2006-12-19 The Directv Group, Inc. Fast acquisition of timing and carrier frequency from received signal
US7471735B2 (en) 2001-04-27 2008-12-30 The Directv Group, Inc. Maximizing power and spectral efficiencies for layered and conventional modulations
US7245671B1 (en) 2001-04-27 2007-07-17 The Directv Group, Inc. Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers
US7184489B2 (en) 2001-04-27 2007-02-27 The Directv Group, Inc. Optimization technique for layered modulation
US7778365B2 (en) * 2001-04-27 2010-08-17 The Directv Group, Inc. Satellite TWTA on-line non-linearity measurement
US7502430B2 (en) 2001-04-27 2009-03-10 The Directv Group, Inc. Coherent averaging for measuring traveling wave tube amplifier nonlinearity
US8005035B2 (en) * 2001-04-27 2011-08-23 The Directv Group, Inc. Online output multiplexer filter measurement
US7639759B2 (en) * 2001-04-27 2009-12-29 The Directv Group, Inc. Carrier to noise ratio estimations from a received signal
US7483505B2 (en) 2001-04-27 2009-01-27 The Directv Group, Inc. Unblind equalizer architecture for digital communication systems
DE60312060T2 (de) * 2002-02-05 2007-08-30 Hughes Electronics Corp., El Segundo Signalvorverarbeitung der überlagerten Signale in einem digitalen Modulationsschema mit überlagerten Signalen zur Verwendung von bestehenden Empfängern
US6718166B2 (en) 2002-05-17 2004-04-06 Illinois Superconductor Corporation, Inc. Multiple carrier adaptive notch filter
AU2003280499A1 (en) 2002-07-01 2004-01-19 The Directv Group, Inc. Improving hierarchical 8psk performance
EP1529347B1 (de) * 2002-07-03 2016-08-24 The Directv Group, Inc. Verfahren und vorrichtung zur modulation in schichten
EP1579706B1 (de) 2002-10-25 2010-12-08 The Directv Group, Inc. Verfahren und vorrichtung zum anpassen von trägerleistungsanforderungen gemäss verfügbarkeit in geschichteten modulationssystemen
US7463676B2 (en) 2002-10-25 2008-12-09 The Directv Group, Inc. On-line phase noise measurement for layered modulation
CA2503530C (en) 2002-10-25 2009-12-22 The Directv Group, Inc. Lower complexity layered modulation signal processor
US7474710B2 (en) 2002-10-25 2009-01-06 The Directv Group, Inc. Amplitude and phase matching for layered modulation reception
EP1563601B1 (de) 2002-10-25 2010-03-17 The Directv Group, Inc. Schätzen des arbeitspunkts eines nichtlinearenausbreitungswellenrührenverstärkers
US7529312B2 (en) 2002-10-25 2009-05-05 The Directv Group, Inc. Layered modulation for terrestrial ATSC applications
US7502429B2 (en) 2003-10-10 2009-03-10 The Directv Group, Inc. Equalization for traveling wave tube amplifier nonlinearity measurements
US7525942B2 (en) 2005-09-01 2009-04-28 Isco International, Inc. Method and apparatus for detecting interference using correlation
US8385483B2 (en) 2008-11-11 2013-02-26 Isco International, Llc Self-adaptive digital RF bandpass and bandstop filter architecture
US9048919B2 (en) 2008-11-11 2015-06-02 Isco International Llc Method and apparatus for an adaptive filter architecture
US20110081243A1 (en) * 2009-10-02 2011-04-07 Sullivan John T Helical airfoil wind turbines
CN102594753A (zh) * 2012-03-09 2012-07-18 上海交通大学 数模混合解调器及解调方法
US9319916B2 (en) 2013-03-15 2016-04-19 Isco International, Llc Method and appartus for signal interference processing
US9794888B2 (en) 2014-05-05 2017-10-17 Isco International, Llc Method and apparatus for increasing performance of a communication link of a communication node
WO2016178778A1 (en) 2015-05-04 2016-11-10 Isco International, Llc Method and apparatus for increasing performance of communication paths for communication nodes
WO2017210056A1 (en) 2016-06-01 2017-12-07 Isco International, Llc Method and apparatus for performing signal conditioning to mitigate interference detected in a communication system
US10298279B2 (en) 2017-04-05 2019-05-21 Isco International, Llc Method and apparatus for increasing performance of communication paths for communication nodes
US10284313B2 (en) 2017-08-09 2019-05-07 Isco International, Llc Method and apparatus for monitoring, detecting, testing, diagnosing and/or mitigating interference in a communication system
US10812121B2 (en) 2017-08-09 2020-10-20 Isco International, Llc Method and apparatus for detecting and analyzing passive intermodulation interference in a communication system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2097657A5 (de) * 1970-07-09 1972-03-03 Ibm France
US3873931A (en) * 1973-10-05 1975-03-25 Comstron Corp FM demodulator circuits
US4027264A (en) * 1976-02-24 1977-05-31 The United States Of America As Represented By The Secretary Of The Army Phase lock loop multitone interference canceling system
US4453137A (en) * 1982-02-05 1984-06-05 The United States Of America As Represented By The Secretary Of The Army Signal processor for plural frequency detection and tracking over predetermined range of frequencies

Also Published As

Publication number Publication date
CN1018317B (zh) 1992-09-16
CN1040467A (zh) 1990-03-14
WO1990002445A1 (en) 1990-03-08
KR900702640A (ko) 1990-12-08
US4992747A (en) 1991-02-12
DE68921265T2 (de) 1995-11-02
EP0356096A3 (en) 1990-10-31
EP0356096A2 (de) 1990-02-28
EP0356096B1 (de) 1995-02-22
JPH04503738A (ja) 1992-07-02
CA1332961C (en) 1994-11-08

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee