BRPI0413496A - estimativa de canal em um receptor "rake" de um sistema de comunicação cdma - Google Patents
estimativa de canal em um receptor "rake" de um sistema de comunicação cdmaInfo
- Publication number
- BRPI0413496A BRPI0413496A BRPI0413496-6A BRPI0413496A BRPI0413496A BR PI0413496 A BRPI0413496 A BR PI0413496A BR PI0413496 A BRPI0413496 A BR PI0413496A BR PI0413496 A BRPI0413496 A BR PI0413496A
- Authority
- BR
- Brazil
- Prior art keywords
- communication system
- channel
- channel estimation
- cdma communication
- rake receiver
- 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
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
- H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Quality & Reliability (AREA)
- Noise Elimination (AREA)
- Mobile Radio Communication Systems (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/640,487 US7428262B2 (en) | 2003-08-13 | 2003-08-13 | Channel estimation in a rake receiver of a CDMA communication system |
PCT/US2004/024398 WO2005020457A1 (en) | 2003-08-13 | 2004-07-28 | Channel estimation in a rake receiver of a cdma communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
BRPI0413496A true BRPI0413496A (pt) | 2006-10-31 |
Family
ID=34136095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BRPI0413496-6A BRPI0413496A (pt) | 2003-08-13 | 2004-07-28 | estimativa de canal em um receptor "rake" de um sistema de comunicação cdma |
Country Status (4)
Country | Link |
---|---|
US (1) | US7428262B2 (pt) |
CN (1) | CN1836381B (pt) |
BR (1) | BRPI0413496A (pt) |
WO (1) | WO2005020457A1 (pt) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005029797A1 (en) * | 2003-09-23 | 2005-03-31 | Koninklijke Philips Electronics N.V. | Adaptive filter |
US7209510B2 (en) * | 2004-07-20 | 2007-04-24 | Skyworks Solution, Inc. | Channel estimation system for a wideband code division multiple access (WCDMA) communication system |
JP2006173691A (ja) * | 2004-12-13 | 2006-06-29 | Hitachi Ltd | 無線通信システム |
KR20060082228A (ko) * | 2005-01-11 | 2006-07-18 | 삼성전자주식회사 | 다중반송파부호분할다중접속 시스템을 위한 파일럿 기반의채널 추정 방법 |
US20060209932A1 (en) | 2005-03-18 | 2006-09-21 | Qualcomm Incorporated | Channel estimation for single-carrier systems |
US20070197220A1 (en) * | 2006-02-17 | 2007-08-23 | Willey William D | Apparatus, and associated method, for providing inner-cell registration of access terminal in a radio communication system |
EP1838009B1 (en) * | 2006-03-24 | 2008-10-08 | Via Technologies, Inc. | Spread spectrum receiver and channel compensation method thereof |
US8032336B2 (en) * | 2006-09-29 | 2011-10-04 | Netlogic Microsystems, Inc. | Distortion cancellation using adaptive linearization |
US8370113B2 (en) | 2006-09-29 | 2013-02-05 | Netlogic Microsystems, Inc. | Low-power and low-cost adaptive self-linearization system with fast convergence |
US8041757B2 (en) | 2006-09-29 | 2011-10-18 | Netlogic Microsystems, Inc. | Low power and low complexity adaptive self-linearization |
US7382292B1 (en) * | 2006-11-10 | 2008-06-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for efficient signal interpolation |
US8081712B2 (en) | 2007-02-02 | 2011-12-20 | Interdigital Technology Corporation | Method and apparatus for mapping of absolute power grant values in wireless communications |
US8315660B2 (en) * | 2007-02-14 | 2012-11-20 | Qualcomm Incorporated | User power offset estimation using dedicated pilot tones for OFDMA |
US7756480B2 (en) * | 2007-02-16 | 2010-07-13 | Samsung Electronics Co., Ltd. | System and method for transmitter leak-over cancellation |
EP1976138A3 (en) * | 2007-03-30 | 2009-05-20 | MediaTek, Inc | Time shared rake fingers and path searcher |
WO2009057520A1 (ja) * | 2007-11-02 | 2009-05-07 | Ntt Docomo, Inc. | ユーザ装置及び信号電力測定方法 |
GB0724423D0 (en) * | 2007-12-14 | 2008-01-30 | Icera Inc | Estimating signal to interference ratio in a wireless communications receiver |
US8428537B2 (en) * | 2010-05-26 | 2013-04-23 | Intel Mobile Communications GmbH | Receiver having adjustable channel estimation bandwidth |
US9276629B2 (en) | 2011-11-17 | 2016-03-01 | Intel Deutschland Gmbh | Rake receiver circuit and method for operating a rake receiver circuit |
JP5921774B2 (ja) | 2012-07-23 | 2016-05-24 | アップル インコーポレイテッド | 適応的チャネル推定/予測フィルタ設計のための方法及びシステム |
US8873504B2 (en) | 2012-08-29 | 2014-10-28 | Motorola Mobility Llc | Flexible low complexity reference signal filtering for LTE receivers |
US8842789B2 (en) * | 2012-11-16 | 2014-09-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Coefficient-specific filtering of initial channel estimates |
US9071482B2 (en) | 2013-09-27 | 2015-06-30 | Telefonaktiebolaget L M Ericsson (Publ) | Power estimation for wireless communication devices in code division multiple access systems technical field |
US9118515B2 (en) * | 2014-01-08 | 2015-08-25 | Freescale Semiconductor, Inc. | Channel estimation in wireless communication |
US10999124B1 (en) * | 2014-12-05 | 2021-05-04 | Marvell Asia Pte, Ltd. | Rapid rate adaptation in NBASE-T ethernet |
US9692616B1 (en) | 2015-12-02 | 2017-06-27 | Samsung Electronics Co., Ltd. | Apparatus for and method of channel estimation buffer compression via decimation, prediction, and error encoding |
KR102563185B1 (ko) * | 2018-04-26 | 2023-08-04 | 에스케이하이닉스 주식회사 | 컨트롤러 및 그의 동작 방법 |
EP3644518B1 (en) * | 2018-10-23 | 2021-06-23 | Nxp B.V. | Optimizing mrc coefficients for rake receiver for increasing snr |
Family Cites Families (27)
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US4386430A (en) * | 1980-10-23 | 1983-05-31 | International Telephone And Telegraph Corporation | Automatic equalizer for synthesizing recursive filters |
GB2247812B (en) * | 1990-09-06 | 1994-08-31 | Motorola Inc | Equalizer for linear modulated signal |
US5513221A (en) * | 1994-05-19 | 1996-04-30 | Hughes Aircraft Company | Doppler bandwidth dependent estimation of a communications channel |
US6697350B2 (en) * | 1995-06-30 | 2004-02-24 | Interdigital Technology Corporation | Adaptive vector correlator for spread-spectrum communications |
ZA965340B (en) * | 1995-06-30 | 1997-01-27 | Interdigital Tech Corp | Code division multiple access (cdma) communication system |
US6049535A (en) * | 1996-06-27 | 2000-04-11 | Interdigital Technology Corporation | Code division multiple access (CDMA) communication system |
US5940131A (en) * | 1995-12-15 | 1999-08-17 | Kokusai Denshin Denwa Co. Ltd. | Method and apparatus for coding moving pictures |
US5737327A (en) * | 1996-03-29 | 1998-04-07 | Motorola, Inc. | Method and apparatus for demodulation and power control bit detection in a spread spectrum communication system |
US5793820A (en) * | 1996-07-10 | 1998-08-11 | Intellon Corporation | Automatic adaptive filtering according to frequency modulation rate |
US6067292A (en) * | 1996-08-20 | 2000-05-23 | Lucent Technologies Inc | Pilot interference cancellation for a coherent wireless code division multiple access receiver |
US5950131A (en) | 1996-10-29 | 1999-09-07 | Motorola, Inc. | Method and apparatus for fast pilot channel acquisition using a matched filter in a CDMA radiotelephone |
JP3805520B2 (ja) * | 1998-01-28 | 2006-08-02 | 富士通株式会社 | 移動通信における速度推定装置および方法 |
US6085104A (en) * | 1998-03-25 | 2000-07-04 | Sharp Laboratories Of America, Inc. | Pilot aided, time-varying finite impulse response, adaptive channel matching receiving system and method |
US6327314B1 (en) * | 1998-04-01 | 2001-12-04 | At&T Corp. | Method and apparatus for channel estimation for multicarrier systems |
US6507602B1 (en) * | 1999-01-07 | 2003-01-14 | Ericsson, Inc. | Smoothing receiver channel estimates using spectral estimation |
US6658045B1 (en) * | 1999-02-22 | 2003-12-02 | Nortel Networks Limited | CDMA communications system adaptive to mobile unit speed |
FI112831B (fi) * | 1999-04-28 | 2004-01-15 | Nokia Corp | Menetelmä kanavaestimaatin muodostamiseksi ja vastaanotin |
US6493329B1 (en) * | 1999-08-23 | 2002-12-10 | Qualcomm Incorporated | Adaptive channel estimation in a wireless communication system |
US6377615B1 (en) * | 1999-09-30 | 2002-04-23 | Ericsson Inc. | Apparatus and methods for receiving information using variable length accumulation searchers |
CN1193563C (zh) * | 2000-02-22 | 2005-03-16 | 皇家菲利浦电子有限公司 | 多载波接收机和含此类接收机的发射系统 |
AU2000267433A1 (en) * | 2000-05-16 | 2001-11-26 | Nortel Networks Limited | Cellular communications system receivers |
KR100377969B1 (ko) * | 2000-07-10 | 2003-03-29 | 이용환 | 적응 채널 추정 장치를 이용한 직접시퀀스 확산대역시스템 수신 장치 |
US7039094B2 (en) * | 2001-05-03 | 2006-05-02 | Electronics And Telecommunications Research Institute | Adaptive rake receiving apparatus constrained with at least one constraint for use in mobile communication system and method therefor |
US6983125B2 (en) * | 2001-09-25 | 2006-01-03 | Qualcomm Incorporated | Method and apparatus for varying the length of an adaptive equalizer based on doppler frequency |
US7116957B2 (en) * | 2001-10-22 | 2006-10-03 | Qualcomm Incorporated | Velocity responsive filtering for pilot signal reception |
US6760362B2 (en) * | 2002-03-15 | 2004-07-06 | Qualcomm Incorporated | Dynamic pilot filter bandwidth estimation |
CN100435499C (zh) * | 2002-06-10 | 2008-11-19 | 北京邮电大学 | 一种用于宽带码分多址系统的信道估计方法 |
-
2003
- 2003-08-13 US US10/640,487 patent/US7428262B2/en not_active Expired - Fee Related
-
2004
- 2004-07-28 BR BRPI0413496-6A patent/BRPI0413496A/pt not_active IP Right Cessation
- 2004-07-28 CN CN2004800231373A patent/CN1836381B/zh not_active Expired - Fee Related
- 2004-07-28 WO PCT/US2004/024398 patent/WO2005020457A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
US7428262B2 (en) | 2008-09-23 |
WO2005020457A1 (en) | 2005-03-03 |
US20050036537A1 (en) | 2005-02-17 |
CN1836381A (zh) | 2006-09-20 |
CN1836381B (zh) | 2013-11-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B25D | Requested change of name of applicant approved |
Owner name: MOTOROLA SOLUTIONS, INC. (US) |
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B25A | Requested transfer of rights approved |
Owner name: MOTOROLA MOBILITY, INC. (US) |
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B25E | Requested change of name of applicant rejected |
Owner name: MOTOROLA MOBILITY, INC. (US) Free format text: INDEFERIDO O PEDIDO DE ALTERACAO DE NOME CONTIDO NA PETICAO 20130041663 DE 16/05/2013, DEVIDO A AUSENCIA DE GUIA DE RECOLHIMENTO RELATIVA AO SERVICO. |
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B25G | Requested change of headquarter approved |
Owner name: MOTOROLA MOBILITY, INC. (US) |
|
B25D | Requested change of name of applicant approved |
Owner name: MOTOROLA MOBILITY LLC (US) |
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B25K | Entry of change of name and/or headquarter and transfer of application, patent and certificate of addition of invention: republication |
Owner name: GOOGLE TECHNOLOGY HOLDINGS LLC (US) |
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B25L | Entry of change of name and/or headquarter and transfer of application, patent and certificate of addition of invention: publication cancelled |
Owner name: GOOGLE TECHNOLOGY HOLDINGS LLC (US) |
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B25A | Requested transfer of rights approved |
Owner name: GOOGLE TECHNOLOGY HOLDINGS LLC (US) |
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B08F | Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette] | ||
B08K | Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette] |