DE3585480D1 - Vielfach-amplituden im phasenquadratur-modulationssystem, faehig zur abschwaechung eines spitzenwertes. - Google Patents
Vielfach-amplituden im phasenquadratur-modulationssystem, faehig zur abschwaechung eines spitzenwertes.Info
- Publication number
- DE3585480D1 DE3585480D1 DE8585112137T DE3585480T DE3585480D1 DE 3585480 D1 DE3585480 D1 DE 3585480D1 DE 8585112137 T DE8585112137 T DE 8585112137T DE 3585480 T DE3585480 T DE 3585480T DE 3585480 D1 DE3585480 D1 DE 3585480D1
- Authority
- DE
- Germany
- Prior art keywords
- reducing
- modulation system
- top value
- phase square
- multiple amplitudes
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
- H04L27/3411—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power reducing the peak to average power ratio or the mean power of the constellation; Arrangements for increasing the shape gain of a signal set
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59199980A JPS6177452A (ja) | 1984-09-25 | 1984-09-25 | 多値直交振幅変調方法および装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3585480D1 true DE3585480D1 (de) | 1992-04-09 |
Family
ID=16416776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8585112137T Expired - Fee Related DE3585480D1 (de) | 1984-09-25 | 1985-09-24 | Vielfach-amplituden im phasenquadratur-modulationssystem, faehig zur abschwaechung eines spitzenwertes. |
Country Status (7)
Country | Link |
---|---|
US (1) | US4675619A (de) |
EP (1) | EP0176089B1 (de) |
JP (1) | JPS6177452A (de) |
AU (1) | AU572064B2 (de) |
BR (1) | BR8504717A (de) |
CA (1) | CA1251526A (de) |
DE (1) | DE3585480D1 (de) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4750191A (en) * | 1984-11-06 | 1988-06-07 | Nec Corporation | D/A converter capable of producing an analog signal having levels of a preselected number different from 2N and communication network comprising the D/A converter |
EP0209902B1 (de) * | 1985-07-24 | 1993-12-08 | Nec Corporation | Mehrpegel-Modulator mit einer kompakten Einheit zur Erzeugung eines Fehlerkorrekturkodes |
US4721928A (en) | 1985-11-21 | 1988-01-26 | Nec Corporation | Multilevel modulator capable of producing a multilevel quadrature amplitude modulated signal having (2n +α) output signal points |
CA1268828A (en) * | 1986-02-08 | 1990-05-08 | Yasuharu Yoshida | Multilevel modulator capable of producing a composite modulated signal comprising a quadrature amplitude modulated component and a phase modulated component |
JPS6455942A (en) * | 1987-08-27 | 1989-03-02 | Fujitsu Ltd | Multi-value quadrature amplitude modulation demodulation system |
JP2701280B2 (ja) * | 1987-12-30 | 1998-01-21 | 日本電気株式会社 | 有効領域判定信号発生回路 |
JP2587432B2 (ja) * | 1987-10-30 | 1997-03-05 | 日本電気株式会社 | 有効領域判定信号検出回路 |
JPH0691563B2 (ja) * | 1988-10-07 | 1994-11-14 | 日本電気株式会社 | 有効領域判定信号発生回路 |
US4816783A (en) * | 1988-01-11 | 1989-03-28 | Motorola, Inc. | Method and apparatus for quadrature modulation |
CA1295700C (en) | 1988-06-10 | 1992-02-11 | Paul Alan Kennard | Method of quadrature-phase amplitude modulation |
US4855692A (en) * | 1988-06-20 | 1989-08-08 | Northern Telecom Limited | Method of quadrature-phase amplitude modulation |
US4910467A (en) * | 1988-11-02 | 1990-03-20 | Motorola, Inc. | Method and apparatus for decoding a quadrature modulated signal |
US4973977A (en) * | 1988-11-29 | 1990-11-27 | Comlux | Digital to amplitude modulated analog converter |
US5081649A (en) * | 1989-06-01 | 1992-01-14 | Northern Telecom Limited | Method of quadrature-phase amplitude modulation |
US4947407A (en) * | 1989-08-08 | 1990-08-07 | Siemens-Pacesetter, Inc. | Sample-and-hold digital phase-locked loop for ask signals |
JP2809957B2 (ja) * | 1993-01-22 | 1998-10-15 | 株式会社東芝 | ディジタルam送信機 |
US5517433A (en) * | 1994-07-07 | 1996-05-14 | Remote Intelligence, Inc. | Parallel digital data communications |
US5673292A (en) * | 1994-10-07 | 1997-09-30 | Northrop Grumman Corporation | AM-PSK system for broadcasting a composite analog and digital signal using adaptive M-ary PSK modulation |
US5621762A (en) * | 1995-06-12 | 1997-04-15 | Motorola, Inc. | Radio with peak power and bandwidth efficient modulation |
US6816008B2 (en) * | 2002-12-31 | 2004-11-09 | Alion Science And Technology Corporation | Quasi-linear multi-state digital modulation through non-linear amplifier arrays |
US7826811B2 (en) * | 2005-11-10 | 2010-11-02 | Panasonic Corporation | Phase modulation apparatus and wireless communication apparatus |
JP5660396B2 (ja) * | 2009-12-01 | 2015-01-28 | 日本電気株式会社 | データ伝送方法、データ受信方法、データ変調装置及びデータ復調装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH609510A5 (de) * | 1976-06-18 | 1979-02-28 | Ibm | |
US4271527A (en) * | 1979-08-31 | 1981-06-02 | Paradyne Corporation | Double side band-quadrature carrier modulation signal structures |
US4700349A (en) * | 1984-02-06 | 1987-10-13 | Codex Corporation | Coded modulation system |
-
1984
- 1984-09-25 JP JP59199980A patent/JPS6177452A/ja active Pending
-
1985
- 1985-09-23 US US06/779,217 patent/US4675619A/en not_active Expired - Lifetime
- 1985-09-24 DE DE8585112137T patent/DE3585480D1/de not_active Expired - Fee Related
- 1985-09-24 CA CA000491461A patent/CA1251526A/en not_active Expired
- 1985-09-24 EP EP85112137A patent/EP0176089B1/de not_active Expired - Lifetime
- 1985-09-24 AU AU47832/85A patent/AU572064B2/en not_active Ceased
- 1985-09-25 BR BR8504717A patent/BR8504717A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0176089B1 (de) | 1992-03-04 |
CA1251526A (en) | 1989-03-21 |
AU572064B2 (en) | 1988-04-28 |
BR8504717A (pt) | 1986-07-22 |
EP0176089A3 (en) | 1988-02-03 |
JPS6177452A (ja) | 1986-04-21 |
AU4783285A (en) | 1986-04-10 |
US4675619A (en) | 1987-06-23 |
EP0176089A2 (de) | 1986-04-02 |
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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 |