DE68921265T2 - Mehrfache Wiederverwendung eines FM-Bandes. - Google Patents
Mehrfache Wiederverwendung eines FM-Bandes.Info
- Publication number
- DE68921265T2 DE68921265T2 DE68921265T DE68921265T DE68921265T2 DE 68921265 T2 DE68921265 T2 DE 68921265T2 DE 68921265 T DE68921265 T DE 68921265T DE 68921265 T DE68921265 T DE 68921265T DE 68921265 T2 DE68921265 T2 DE 68921265T2
- 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
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)
- Synchronisation In Digital Transmission Systems (AREA)
- Circuits Of Receivers In General (AREA)
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 DE68921265D1 (de) | 1995-03-30 |
DE68921265T2 true 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 (41)
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 |
US7471735B2 (en) | 2001-04-27 | 2008-12-30 | The Directv Group, Inc. | Maximizing power and spectral efficiencies for layered and conventional modulations |
US8005035B2 (en) * | 2001-04-27 | 2011-08-23 | The Directv Group, Inc. | Online output multiplexer filter measurement |
US7778365B2 (en) * | 2001-04-27 | 2010-08-17 | The Directv Group, Inc. | Satellite TWTA on-line non-linearity measurement |
US7423987B2 (en) | 2001-04-27 | 2008-09-09 | The Directv Group, Inc. | Feeder link configurations to support layered modulation for digital signals |
US7583728B2 (en) | 2002-10-25 | 2009-09-01 | The Directv Group, Inc. | Equalizers for layered modulated and other signals |
US7173981B1 (en) * | 2001-04-27 | 2007-02-06 | The Directv Group, Inc. | Dual layer signal processing in a layered modulation digital signal system |
US7639759B2 (en) * | 2001-04-27 | 2009-12-29 | The Directv Group, Inc. | Carrier to noise ratio estimations from a received signal |
US7822154B2 (en) | 2001-04-27 | 2010-10-26 | The Directv Group, Inc. | Signal, interference and noise power measurement |
US7209524B2 (en) * | 2001-04-27 | 2007-04-24 | The Directv Group, Inc. | Layered modulation for digital signals |
ES2282528T3 (es) * | 2002-02-05 | 2007-10-16 | Hughes Electronics Corporation | Preprocesamiento de las señales superpuestas en un esquema de transmision digital de modulacion estratificada para utilizar receptores legados. |
US6718166B2 (en) | 2002-05-17 | 2004-04-06 | Illinois Superconductor Corporation, Inc. | Multiple carrier adaptive notch filter |
EP1529347B1 (de) * | 2002-07-03 | 2016-08-24 | The Directv Group, Inc. | Verfahren und vorrichtung zur modulation in schichten |
EP1563620B1 (de) * | 2002-10-25 | 2012-12-05 | The Directv Group, Inc. | Signalprozessor für geschichtete Modulation mit niedrigerer Komplexität |
US7525942B2 (en) | 2005-09-01 | 2009-04-28 | Isco International, Inc. | Method and apparatus for detecting interference using correlation |
US9048919B2 (en) | 2008-11-11 | 2015-06-02 | Isco International Llc | Method and apparatus for an adaptive filter architecture |
US8385483B2 (en) | 2008-11-11 | 2013-02-26 | Isco International, Llc | Self-adaptive digital RF bandpass and bandstop 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 |
US10652835B2 (en) | 2016-06-01 | 2020-05-12 | Isco International, Llc | Signal conditioning to mitigate interference impacting wireless communication links in radio access networks |
US10298279B2 (en) | 2017-04-05 | 2019-05-21 | Isco International, Llc | Method and apparatus for increasing performance of communication paths for communication nodes |
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 |
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 |
Family Cites Families (4)
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 |
-
1989
- 1989-05-15 US US07/352,400 patent/US4992747A/en not_active Expired - Fee Related
- 1989-08-07 JP JP1508907A patent/JPH04503738A/ja active Pending
- 1989-08-07 WO PCT/US1989/003388 patent/WO1990002445A1/en unknown
- 1989-08-07 KR KR1019900700746A patent/KR900702640A/ko not_active Application Discontinuation
- 1989-08-14 CA CA000608300A patent/CA1332961C/en not_active Expired - Fee Related
- 1989-08-14 DE DE68921265T patent/DE68921265T2/de not_active Expired - Fee Related
- 1989-08-14 EP EP89308225A patent/EP0356096B1/de not_active Expired - Lifetime
- 1989-08-16 CN CN89106512A patent/CN1018317B/zh not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0356096A3 (en) | 1990-10-31 |
WO1990002445A1 (en) | 1990-03-08 |
CA1332961C (en) | 1994-11-08 |
CN1040467A (zh) | 1990-03-14 |
EP0356096A2 (de) | 1990-02-28 |
EP0356096B1 (de) | 1995-02-22 |
KR900702640A (ko) | 1990-12-08 |
JPH04503738A (ja) | 1992-07-02 |
DE68921265D1 (de) | 1995-03-30 |
CN1018317B (zh) | 1992-09-16 |
US4992747A (en) | 1991-02-12 |
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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 |