DE68919909D1 - Modulationseinrichtung für ein digitales Radiokommunikationssystem. - Google Patents
Modulationseinrichtung für ein digitales Radiokommunikationssystem.Info
- Publication number
- DE68919909D1 DE68919909D1 DE68919909T DE68919909T DE68919909D1 DE 68919909 D1 DE68919909 D1 DE 68919909D1 DE 68919909 T DE68919909 T DE 68919909T DE 68919909 T DE68919909 T DE 68919909T DE 68919909 D1 DE68919909 D1 DE 68919909D1
- Authority
- DE
- Germany
- Prior art keywords
- communication system
- radio communication
- modulation device
- digital radio
- digital
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03114—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals
- H04L25/03133—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals with a non-recursive structure
-
- 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
- H04L27/36—Modulator circuits; Transmitter circuits
- H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
- H04L27/364—Arrangements for overcoming imperfections in the modulator, e.g. quadrature error or unbalanced I and Q levels
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13123388 | 1988-05-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE68919909D1 true DE68919909D1 (de) | 1995-01-26 |
DE68919909T2 DE68919909T2 (de) | 1995-05-04 |
Family
ID=15053127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE68919909T Expired - Lifetime DE68919909T2 (de) | 1988-05-28 | 1989-05-29 | Modulationseinrichtung für ein digitales Radiokommunikationssystem. |
Country Status (4)
Country | Link |
---|---|
US (1) | US4965536A (de) |
EP (1) | EP0344678B1 (de) |
JP (1) | JPH07114345B2 (de) |
DE (1) | DE68919909T2 (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07114345B2 (ja) | 1988-05-28 | 1995-12-06 | 日本電気株式会社 | 変調装置 |
FR2711464B1 (fr) * | 1993-10-19 | 1995-12-22 | Telediffusion Fse | Modulateur numérique à débit variable et son utilisation en radiodiffusion FM. |
CA2144596A1 (en) * | 1994-04-05 | 1995-10-06 | Richard Prodan | Modulator/demodulator using baseband filtering |
US5659578A (en) * | 1994-11-23 | 1997-08-19 | At&T Wireless Services, Inc. | High rate Reed-Solomon concatenated trellis coded 16 star QAM system for transmission of data over cellular mobile radio |
US5675590A (en) * | 1994-11-23 | 1997-10-07 | At&T Wireless Services, Inc. | Cyclic trellis coded modulation |
US6889356B1 (en) | 1994-11-23 | 2005-05-03 | Cingular Wireless Ii, Llc | Cyclic trellis coded modulation |
US5831879A (en) * | 1994-12-22 | 1998-11-03 | Harris Corporation | Digital transmit filter |
DE69637220T3 (de) * | 1995-07-12 | 2012-02-02 | Nec Corp. | Verfahren und Vorrichtung für mehrstufige Quadratur-Amplitudenmodulation |
DE19647764A1 (de) * | 1996-11-19 | 1998-05-20 | Bosch Gmbh Robert | Verfahren zur bidirektionalen Datenübertragung |
US6625628B1 (en) * | 1999-03-30 | 2003-09-23 | Nec Corporation | Method and apparatus for digital filter |
US6608807B1 (en) * | 2000-02-02 | 2003-08-19 | Calimetrics, Inc. | Generating a multilevel calibration sequence for precompensation |
US7046738B1 (en) * | 2000-02-08 | 2006-05-16 | Ericsson Inc. | 8-PSK transmit filtering using reduced look up tables |
US6639537B1 (en) * | 2000-03-31 | 2003-10-28 | Massachusetts Institute Of Technology | Highly linear analog-to-digital conversion system and method thereof |
FI20001513A (fi) * | 2000-06-26 | 2001-12-27 | Nokia Networks Oy | Menetelmä tiedonsiirron laadun parantamiseksi |
US7693179B2 (en) * | 2002-11-29 | 2010-04-06 | Panasonic Corporation | Data transmission apparatus using a constellation rearrangement |
JP5358676B2 (ja) * | 2009-03-27 | 2013-12-04 | パナソニック株式会社 | フィルタ回路、送信フィルタ回路、半導体集積回路及び通信機器並びにフィルタ回路のタイミング調整方法 |
US8908786B1 (en) * | 2012-06-06 | 2014-12-09 | Arris Enterprises, Inc. | Optimized QAM transmission |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4404532A (en) * | 1978-09-29 | 1983-09-13 | Communications Satellite Corporation | Modulator having improved bandwidth and power requirements |
JPS60241314A (ja) * | 1984-05-16 | 1985-11-30 | Nec Corp | デイジタルフイルタ |
NL8402319A (nl) * | 1984-07-23 | 1986-02-17 | Philips Nv | Inrichting voor het genereren van een hoekgemoduleerd draaggolfsignaal van constante amplitude in responsie op datasignalen. |
JPH0648830B2 (ja) * | 1985-11-21 | 1994-06-22 | 日本電気株式会社 | 変調装置 |
US4812786A (en) * | 1987-09-28 | 1989-03-14 | California Institute Of Technology | Method and system for providing precise multi-function modulation |
JPH07114345B2 (ja) | 1988-05-28 | 1995-12-06 | 日本電気株式会社 | 変調装置 |
-
1989
- 1989-05-24 JP JP1130460A patent/JPH07114345B2/ja not_active Expired - Lifetime
- 1989-05-29 DE DE68919909T patent/DE68919909T2/de not_active Expired - Lifetime
- 1989-05-29 EP EP89109639A patent/EP0344678B1/de not_active Expired - Lifetime
- 1989-05-30 US US07/358,114 patent/US4965536A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE68919909T2 (de) | 1995-05-04 |
JPH07114345B2 (ja) | 1995-12-06 |
EP0344678A2 (de) | 1989-12-06 |
EP0344678A3 (en) | 1990-12-27 |
US4965536A (en) | 1990-10-23 |
EP0344678B1 (de) | 1994-12-14 |
JPH0263208A (ja) | 1990-03-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8363 | Opposition against the patent | ||
8365 | Fully valid after opposition proceedings | ||
8310 | Action for declaration of annulment | ||
8313 | Request for invalidation rejected/withdrawn |