BRPI0406432A - Método de demodulação utilizando decisão soft para modulação de amplitude em quadratura e equipamento para o mesmo - Google Patents
Método de demodulação utilizando decisão soft para modulação de amplitude em quadratura e equipamento para o mesmoInfo
- Publication number
- BRPI0406432A BRPI0406432A BR0406432-1A BRPI0406432A BRPI0406432A BR PI0406432 A BRPI0406432 A BR PI0406432A BR PI0406432 A BRPI0406432 A BR PI0406432A BR PI0406432 A BRPI0406432 A BR PI0406432A
- Authority
- BR
- Brazil
- Prior art keywords
- quadrature amplitude
- equipment
- soft decision
- decision
- demodulation method
- Prior art date
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
- H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
- H04L25/067—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing soft decisions, i.e. decisions together with an estimate of reliability
-
- 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
- H04L27/38—Demodulator circuits; Receiver circuits
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)
Abstract
"MéTODO DE DEMODULAçãO UTILIZANDO DECISãO SOFT PARA MODULAçãO DE AMPLITUDE EM QUADRATURA E EQUIPAMENTO PARA O MESMO". Que provê uma demodulação de decisão soft de uma modulação de amplitude em quadratura (QAM) quadrada. No método de decisão soft para demodular um sinal recebido de uma QAM quadrada, consistindo de um componente de sinal em fase e um componente de sinal em fase de quadratura, obtém-se o valor do vetor de probabilidade condicional, sendo cada valor de decisão soft correspondente a uma posição de bit de uma decisão hard, utilizando uma função que inclui uma operação de determinação condicional proveniente do componente de fase de quadratura e do componente em fase do sinal recebido. A velocidade de processo é aprimorada e o custo para produzir o equipamento é reduzido.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020030040902A KR100433028B1 (ko) | 2003-06-23 | 2003-06-23 | 정방형 직교진폭변조(qam)수신신호를 복조하기 위한 연성결정 방법 및 그 장치 |
| KR1020040000800A KR100435803B1 (ko) | 2004-01-06 | 2004-01-06 | 정방형 직교진폭변조(qam)수신신호를 복조하기 위한 연성결정 방법 및 연성결정복조장치 |
| PCT/KR2004/000032 WO2004114616A1 (en) | 2003-06-23 | 2004-01-10 | A demodulation method using soft decision for quadrature amplitude modulation and apparatus thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BRPI0406432A true BRPI0406432A (pt) | 2005-11-22 |
Family
ID=36168771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR0406432-1A BRPI0406432A (pt) | 2003-06-23 | 2004-01-10 | Método de demodulação utilizando decisão soft para modulação de amplitude em quadratura e equipamento para o mesmo |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US7580480B2 (pt) |
| EP (1) | EP1654847B1 (pt) |
| JP (1) | JP4452716B2 (pt) |
| BR (1) | BRPI0406432A (pt) |
| CY (1) | CY1118421T1 (pt) |
| DK (1) | DK1654847T3 (pt) |
| ES (1) | ES2608397T3 (pt) |
| HU (1) | HUE031189T2 (pt) |
| PT (1) | PT1654847T (pt) |
| RU (1) | RU2380847C2 (pt) |
| SI (1) | SI1654847T1 (pt) |
| WO (1) | WO2004114616A1 (pt) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007045122A1 (fr) * | 2005-10-18 | 2007-04-26 | Zte Corporation | Procede de demodulation logicielle pour 16 qam dans un systeme de communication |
| CN102594768B (zh) * | 2011-01-11 | 2015-05-13 | 中兴通讯股份有限公司 | 适用于多qam系统的软解调方法及装置 |
| CN107947800B (zh) * | 2017-11-08 | 2021-07-16 | 中国电子科技集团公司电子科学研究院 | 一种二进制ldpc码的低时延环检测方法 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2756996A1 (fr) * | 1996-12-10 | 1998-06-12 | Philips Electronics Nv | Systeme et procede de transmission numerique comportant un code produit combine a une modulation multidimensionnelle |
| US6480552B1 (en) * | 1999-03-24 | 2002-11-12 | Lucent Technologies Inc. | Soft output metrics generation for symbol detectors |
| US6594318B1 (en) | 1999-12-02 | 2003-07-15 | Qualcomm Incorporated | Method and apparatus for computing soft decision input metrics to a turbo decoder |
| US6507619B1 (en) * | 2000-03-24 | 2003-01-14 | Atheros Communications, Inc. | Decoding system and method for digital communications |
| AU2002218138A1 (en) * | 2000-10-16 | 2002-04-29 | Systemonic Ag | Method for generating soft bit information from gray coded signals |
| US6834088B2 (en) * | 2001-03-12 | 2004-12-21 | Motorola, Inc. | Method and apparatus for calculating bit log-likelihood ratios for QAM signals |
| GB0112657D0 (en) * | 2001-05-24 | 2001-07-18 | Cambridge Silicon Radio Ltd | Decoding signals |
| US6993098B2 (en) | 2001-07-12 | 2006-01-31 | Koninklijke Philips Electronics N.V. | Method and apparatus for efficient calculating distance metric |
| KR100800885B1 (ko) | 2001-08-13 | 2008-02-04 | 삼성전자주식회사 | 다중레벨변조를 사용하는 통신시스템의 복조장치 및 방법 |
| KR100450949B1 (ko) | 2001-09-18 | 2004-10-02 | 삼성전자주식회사 | 데이터 통신 시스템에서 채널 복호기 입력 연성 결정 값계산 장치 및 방법 |
| EP1461924A4 (en) * | 2001-11-29 | 2010-07-07 | Qualcomm Inc | METHOD AND APPARATUS FOR DETERMINING THE REAL-REASON LOGARITHM USING PRECODING |
| US6862552B2 (en) * | 2003-01-15 | 2005-03-01 | Pctel, Inc. | Methods, apparatus, and systems employing soft decision decoding |
-
2004
- 2004-01-10 JP JP2006516900A patent/JP4452716B2/ja not_active Expired - Lifetime
- 2004-01-10 BR BR0406432-1A patent/BRPI0406432A/pt not_active IP Right Cessation
- 2004-01-10 ES ES04701310.7T patent/ES2608397T3/es not_active Expired - Lifetime
- 2004-01-10 DK DK04701310.7T patent/DK1654847T3/en active
- 2004-01-10 RU RU2005117380/09A patent/RU2380847C2/ru active
- 2004-01-10 HU HUE04701310A patent/HUE031189T2/hu unknown
- 2004-01-10 WO PCT/KR2004/000032 patent/WO2004114616A1/en active Application Filing
- 2004-01-10 PT PT47013107T patent/PT1654847T/pt unknown
- 2004-01-10 US US10/536,756 patent/US7580480B2/en active Active
- 2004-01-10 EP EP04701310.7A patent/EP1654847B1/en not_active Expired - Lifetime
- 2004-01-10 SI SI200432365A patent/SI1654847T1/sl unknown
-
2017
- 2017-01-12 CY CY20171100044T patent/CY1118421T1/el unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP1654847A4 (en) | 2011-05-18 |
| PT1654847T (pt) | 2017-01-06 |
| US7580480B2 (en) | 2009-08-25 |
| ES2608397T3 (es) | 2017-04-10 |
| RU2005117380A (ru) | 2006-01-20 |
| JP2007521738A (ja) | 2007-08-02 |
| EP1654847B1 (en) | 2016-10-12 |
| US20060034392A1 (en) | 2006-02-16 |
| JP4452716B2 (ja) | 2010-04-21 |
| EP1654847A1 (en) | 2006-05-10 |
| CY1118421T1 (el) | 2017-06-28 |
| SI1654847T1 (sl) | 2017-01-31 |
| RU2380847C2 (ru) | 2010-01-27 |
| WO2004114616A1 (en) | 2004-12-29 |
| HUE031189T2 (hu) | 2017-07-28 |
| DK1654847T3 (en) | 2017-01-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B06A | Patent application procedure suspended [chapter 6.1 patent gazette] | ||
| B09A | Decision: intention to grant [chapter 9.1 patent gazette] | ||
| B16A | Patent or certificate of addition of invention granted [chapter 16.1 patent gazette] | ||
| B25A | Requested transfer of rights approved | ||
| B21F | Lapse acc. art. 78, item iv - on non-payment of the annual fees in time |
Free format text: EXTINTA A PATENTE, NOS TERMOS DO ARTIGO 86, DA LPI, E ARTIGO 10 DA RESOLUCAO 113/2013, REFERENTE AO NAO RECOLHIMENTO DA 18A RETRIBUICAO ANUAL, PARA FINS DE RESTAURACAO CONFORME ARTIGO 87 DA LPI 9.279, SOB PENA DA MANUTENCAO DA EXTINCAO CASO NAO SEJA RESTAURADA DENTRO DO PRAZO LEGAL, CONFORME O DISPOSTO NO ARTIGO 78, INCISO IV, DA LPI E ARTIGO 12 DA RESOLUCAO 113/2013. |
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| B24D | Patent annual fee: restoration after fee payment |