BR9807250A - Sistema para uso na compensação de esmaecimento de um sinal am analógico, transmissor e receptor de sinal am analógico para uso na compensação de esmaecimento, e, processo de compensação para o esmaecimento de um sinal am analógico - Google Patents
Sistema para uso na compensação de esmaecimento de um sinal am analógico, transmissor e receptor de sinal am analógico para uso na compensação de esmaecimento, e, processo de compensação para o esmaecimento de um sinal am analógicoInfo
- Publication number
- BR9807250A BR9807250A BR9807250-1A BR9807250A BR9807250A BR 9807250 A BR9807250 A BR 9807250A BR 9807250 A BR9807250 A BR 9807250A BR 9807250 A BR9807250 A BR 9807250A
- Authority
- BR
- Brazil
- Prior art keywords
- signal
- fading
- compensation
- time
- analog
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/005—Control of transmission; Equalising
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Noise Elimination (AREA)
- Transmitters (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Mobile Radio Communication Systems (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
"SISTEMA PARA USO NA COMPENSAçãO DE ESMAECIMENTO DE UM SINAL AM ANALóGICO, TRANSMISSOR E RECEPTOR DE SINAL AM ANALóGICO PARA USO NA COMPENSAçãO DE ESMAECIMENTO, E, PROCESSO DE COMPENSAçãO PARA O ESMAECIMENTO DE UM SINAL AM ANALóGICO". Um aparelho e processo de compensação de esmaecimento são fornecidos nos quais os blocos do sinal AM analógico (por exemplo, voz) são comprimidos em tempo em um transmissor (10). Os espaços no sinal comprimido em tempo (15) são preenchidos com símbolos piloto (17) (ou formas de ondas complexas similares) possuindo características conhecidas, tais como amplitudes predeterminadas. O sinal AM analógico comprimido em tempo (por exemplo, SSB ou VSB) é transmitido através do canal de esmaecimento. Em um receptor AM analógico (20), uma estimativa (24) do esmaecimento que ocorreu no canal de transmissão é feita pela observação da amplitude dos símbolos piloto recebidos em pontos separados no tempo, e a interpolação (26) para determinar a quantidade de esmaecimento que ocorreu através do sinal transmitido totasl. Um compensador de esmaecimento (30) compara o sinal comprimido no tempo esmaecido e recebido (28) com os resultados de interpolação (27), e ajusta a amplitude e a fase do sinal recebido de acordo para compensar o esmaecimento que ocorreu no canal de transmissão. O sinal AM analógico compensador é expandido no tempo (32) e enviado para um usuário.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/802,670 US6085103A (en) | 1997-02-19 | 1997-02-19 | Compensating for fading in analog AM radio signals |
PCT/US1998/002936 WO1998037644A1 (en) | 1997-02-19 | 1998-02-17 | Compensating for fading in analog am radio signals |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9807250A true BR9807250A (pt) | 2000-05-02 |
Family
ID=25184379
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9807250-1A BR9807250A (pt) | 1997-02-19 | 1998-02-17 | Sistema para uso na compensação de esmaecimento de um sinal am analógico, transmissor e receptor de sinal am analógico para uso na compensação de esmaecimento, e, processo de compensação para o esmaecimento de um sinal am analógico |
Country Status (10)
Country | Link |
---|---|
US (1) | US6085103A (pt) |
EP (1) | EP0962063B1 (pt) |
JP (1) | JP2001512644A (pt) |
CN (1) | CN1121761C (pt) |
AU (1) | AU6167898A (pt) |
BR (1) | BR9807250A (pt) |
CA (1) | CA2281726A1 (pt) |
DE (1) | DE69807190T2 (pt) |
TW (1) | TW371821B (pt) |
WO (1) | WO1998037644A1 (pt) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3289676B2 (ja) * | 1998-05-28 | 2002-06-10 | 日本電気株式会社 | パイロット信号を含む受信信号の復調方法及びその装置 |
US6519300B1 (en) * | 1998-11-12 | 2003-02-11 | Ericsson Inc. | System and method for automatic frequency correction in a pilot symbol assisted demodulator |
KR100318952B1 (ko) * | 1999-12-29 | 2002-01-04 | 윤종용 | 무선통신시스템에서 채널 추정을 위한 장치 및 방법 |
WO2001095496A1 (fr) * | 2000-06-06 | 2001-12-13 | Sakai, Yasue | Procede et appareil de compression, procede et appareil d'expansion, systeme de compression expansion |
US7620368B2 (en) * | 2004-03-19 | 2009-11-17 | Qualcomm, Incorporated | Systems and techniques for testing a wireless communications device |
FR2995115B1 (fr) * | 2012-09-04 | 2014-09-05 | Sigfox | Procedes d'emission et de reception de donnees dans un systeme de telecommunications numeriques |
WO2015125194A1 (ja) | 2014-02-21 | 2015-08-27 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ | 送信装置、受信装置、送信方法及び受信方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4821097A (en) * | 1987-03-05 | 1989-04-11 | General Instrument Corporation | Apparatus and method for providing digital audio on the sound carrier of a standard television signal |
JPH061908B2 (ja) * | 1988-02-02 | 1994-01-05 | 郵政省通信総合研究所長 | 伝送路歪補償方式 |
US5319801A (en) * | 1990-12-05 | 1994-06-07 | Alliedsignal Inc. | Seamless frequency hopping system |
US5222250A (en) * | 1992-04-03 | 1993-06-22 | Cleveland John F | Single sideband radio signal processing system |
US5428610A (en) * | 1992-11-10 | 1995-06-27 | World Communication Ventures, Inc. | FM radio system employing time shared wide SCA for digital data band |
US5414734A (en) * | 1993-01-06 | 1995-05-09 | Glenayre Electronics, Inc. | Compensation for multi-path interference using pilot symbols |
US5619528A (en) * | 1993-04-16 | 1997-04-08 | Trans Video Electronics | High speed teleconference system |
JP3153869B2 (ja) * | 1993-05-11 | 2001-04-09 | 株式会社日立国際電気 | フェージング歪補償方式及びその回路 |
FI941072A (fi) * | 1994-03-07 | 1995-09-08 | Nokia Mobile Phones Ltd | Tiedonsiirtomenetelmä, lähetin sekä vastaanotin |
US5809083A (en) * | 1994-11-23 | 1998-09-15 | At&T Wireless Services, Inc. | Differentially encoded pilot word system and method for wireless transmissions of digital data |
US5712877A (en) * | 1995-05-26 | 1998-01-27 | Simon Fraser University | Pilot-symbol aided continuous phase modulation system |
US5901185A (en) * | 1996-04-15 | 1999-05-04 | Ericsson Inc. | Systems and methods for data-augmented, pilot-symbol-assisted radiotelephone communications |
WO1998002936A1 (en) * | 1996-07-16 | 1998-01-22 | Qualcomm Incorporated | Modified helical antenna |
US5912931A (en) * | 1996-08-01 | 1999-06-15 | Nextel Communications | Method for multicarrier signal detection and parameter estimation in mobile radio communication channels |
-
1997
- 1997-02-19 US US08/802,670 patent/US6085103A/en not_active Expired - Lifetime
-
1998
- 1998-02-05 TW TW087101514A patent/TW371821B/zh active
- 1998-02-17 DE DE69807190T patent/DE69807190T2/de not_active Expired - Lifetime
- 1998-02-17 CN CN98802633A patent/CN1121761C/zh not_active Expired - Fee Related
- 1998-02-17 AU AU61678/98A patent/AU6167898A/en not_active Abandoned
- 1998-02-17 WO PCT/US1998/002936 patent/WO1998037644A1/en active IP Right Grant
- 1998-02-17 CA CA002281726A patent/CA2281726A1/en not_active Abandoned
- 1998-02-17 JP JP53675698A patent/JP2001512644A/ja active Pending
- 1998-02-17 EP EP98906458A patent/EP0962063B1/en not_active Expired - Lifetime
- 1998-02-17 BR BR9807250-1A patent/BR9807250A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US6085103A (en) | 2000-07-04 |
TW371821B (en) | 1999-10-11 |
CN1248358A (zh) | 2000-03-22 |
CA2281726A1 (en) | 1998-08-27 |
EP0962063A1 (en) | 1999-12-08 |
WO1998037644A1 (en) | 1998-08-27 |
DE69807190T2 (de) | 2003-05-08 |
JP2001512644A (ja) | 2001-08-21 |
DE69807190D1 (de) | 2002-09-19 |
CN1121761C (zh) | 2003-09-17 |
AU6167898A (en) | 1998-09-09 |
EP0962063B1 (en) | 2002-08-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B08F | Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette] |
Free format text: REFERENTE A 6A,7A,8A E 9A ANUIDADES. |
|
B08K | Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette] |
Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1887 DE 06/03/2007. |