JPH11502098A - 通信システムにおけるチャネル推定の改善 - Google Patents
通信システムにおけるチャネル推定の改善Info
- Publication number
- JPH11502098A JPH11502098A JP9525179A JP52517997A JPH11502098A JP H11502098 A JPH11502098 A JP H11502098A JP 9525179 A JP9525179 A JP 9525179A JP 52517997 A JP52517997 A JP 52517997A JP H11502098 A JPH11502098 A JP H11502098A
- Authority
- JP
- Japan
- Prior art keywords
- data sequence
- channel
- samples
- sequence
- signal
- 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.)
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Links
Classifications
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- 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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0054—Detection of the synchronisation error by features other than the received signal transition
- H04L7/0062—Detection of the synchronisation error by features other than the received signal transition detection of error based on data decision error, e.g. Mueller type detection
-
- 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
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- 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
- H04L25/0212—Channel estimation of impulse response
- H04L25/0214—Channel estimation of impulse response of a single coefficient
-
- 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
- H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
- H04L25/0236—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols using estimation of the other symbols
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.通信システムにおいてチャネルを推定する方法であって、前記通信システ ムは基準シーケンスとデータ・シーケンスとの両方を備える信号を実行し、前記 データ・シーケンスは前記信号の送信結果としての誤差を有する、通信システム においてチャネルを推定する方法が: 前記基準シーケンスおよび前記データ・シーケンスを含む被送信信号を受信す る段階; 前記基準シーケンスに基づいてチャネルを推定し、第1チャネル推定値を生成 する段階; 前記第1チャネル推定値を用いて前記データ・シーケンスの誤差を改善し、被 改善データ・シーケンスを生成する段階; 前記被改善データ・シーケンスを変更して被変更データ・シーケンスを生成す る段階;および 前記被変更データ・シーケンスに基づいて再びチャネルを推定し、第2チャネ ル推定値を生成する段階; によって構成されることを特徴とする方法。 2.前記第2チャネル推定値を用いて前記被改善データ・シーケンスをさらに 改善して、2回改善されたデータ・シーケンスを生成する段階;および 前記2回改善されたデータ・シーケンスを解読して被解読データを生成する段 階; によってさらに構成される請求項1記載の方法。 3.前記被改善データ・シーケンスを変更する前記段階が: 前記被改善データ・シーケンスを所定群のサンプルに量子化する段階;および 所定の規範に基づいて前記所定群のサンプルから残存サンプルを確保し、前記 所定群のサンプルの残りを廃棄する段階; によってさらに構成される請求項1記載の方法。 4.前記残存サンプルを確保する前記段階が、前記所定群のサンプルのベクト ル平均を計算する段階によってさらに構成される請求項3記載の方法。 5.所定の規範に基づいて残存サンプルを確保する前記段階が、前記所定群の サンプルの前記ベクトル平均上に最大射影を有する残存サンプルを確保する段階 によってさらに構成される請求項4記載の方法。 6.通信システムにおいてチャネルを推定する装置であって、前記通信システ ムは基準シーケンスとデータ・シーケンスとの両方を備える信号を実行し、前記 データ・シーケンスは前記信号の送信結果としての誤差を有する、通信システム においてチャネルを推定する装置が: 前記基準シーケンスおよび前記データ・シーケンスを含む被送信信号を受信す る手段; 前記基準シーケンスに基づいてチャネルを推定し、第1 チャネル推定値を生成する手段; 前記第1チャネル推定値を用いて前記データ・シーケンスの誤差を改善し、被 改善データ・シーケンスを生成する手段; 前記被改善データ・シーケンスを変更する手段;および 前記被変更データ・シーケンスに基づいて再びチャネルを推定し、第2チャネ ル推定値を生成する手段; によって構成されることを特徴とする装置。 7.前記第2チャネル推定値を用いて前記被改善データ・シーケンスをさらに 改善して、2回改善されたデータ・シーケンスを生成する手段;および 前記2回改善されたデータ・シーケンスを解読して被解読データを生成する手 段; によってさらに構成される請求項6記載の装置。 8.前記被改善データ・シーケンスを変更する前記手段が: 前記被改善データ・シーケンスを所定群のサンプルに量子化する手段;および 所定の規範に基づいて前記所定群のサンプルから残存サンプルを確保し、前記 所定群のサンプルの残りを廃棄する手段; によってさらに構成される請求項6記載の装置。 9.残存サンプルを確保する前記手段が、前記所定群のサンプルのベクトル平 均を計算する手段によってさらに構 成される請求項8記載の装置。 10.通信システムにおいてチャネルを推定する装置であって、前記通信シス テムは前記信号の送信結果としての誤差を有するデータ・シーケンスを含む信号 を実行し、前記装置は複数の被推定ウォルシュ符号に基づいてチャネル推定値を 作成する、通信システムにおいてチャネルを推定する装置が: 前記データ・シーケンスを含む被送信信号を受信する手段; 前記データ・シーケンスをウォルシュ・チップに拡散解除する手段; 前記ウォルシュ・チップを、そのうちの1つが前記データ・シーケンスに関す る情報を含む、複数のFHT出力に変形する手段; 前記複数のFHT出力のうちどれが前記データ・シーケンスに関する情報を含 むかを推定する手段; 前記データ・シーケンスに関する情報を含む前記1つのFHT出力の推定値が 正しいか否かを判定する手段;および 前記推定値が正しくないと判定された場合は、前記推定値を廃棄して、チャネ ル推定値の作成にそれが用いられないようにする手段; によって構成されることを特徴とする装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/582,691 | 1996-01-04 | ||
US08/582,691 US5687198A (en) | 1996-01-04 | 1996-01-04 | Channel estimation in a communication system |
PCT/US1996/017288 WO1997025780A1 (en) | 1996-01-04 | 1996-10-28 | Improved channel estimation in a communication system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11502098A true JPH11502098A (ja) | 1999-02-16 |
JP3881024B2 JP3881024B2 (ja) | 2007-02-14 |
Family
ID=24330130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52517997A Expired - Fee Related JP3881024B2 (ja) | 1996-01-04 | 1996-10-28 | 通信システムにおけるチャネル推定の改善 |
Country Status (6)
Country | Link |
---|---|
US (1) | US5687198A (ja) |
JP (1) | JP3881024B2 (ja) |
KR (1) | KR100260862B1 (ja) |
CN (1) | CN1084089C (ja) |
BR (1) | BR9607811A (ja) |
WO (1) | WO1997025780A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004501525A (ja) * | 2000-01-14 | 2004-01-15 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | データ伝送装置を同期するための方法および装置 |
US6993308B2 (en) | 2000-07-26 | 2006-01-31 | Matsushita Electric Industrial Co., Ltd. | Radio receiving device and radio receiving method |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6278744B1 (en) | 1996-11-15 | 2001-08-21 | Conexant Systems, Inc. | System for controlling and shaping the spectrum and redundancy of signal-point limited transmission |
US6192087B1 (en) | 1996-11-15 | 2001-02-20 | Conexant Systems, Inc. | Method and apparatus for spectral shaping in signal-point limited transmission systems |
US5940439A (en) * | 1997-02-26 | 1999-08-17 | Motorola Inc. | Method and apparatus for adaptive rate communication system |
JP3441636B2 (ja) | 1997-11-21 | 2003-09-02 | 株式会社エヌ・ティ・ティ・ドコモ | チャネル推定値を求める装置および方法、受信装置ならびに伝送システム |
AT407933B (de) * | 1998-06-09 | 2001-07-25 | Juha Dipl Ing Laurila | Verfahren zur trennung und zur detektion von gleichkanal-signalen |
US6687317B1 (en) | 1999-04-16 | 2004-02-03 | Koninklijke Philips Electronics N.V. | Method for correlation directed echo cancellation and channel equalization for the digital transmission link in vestigial side band amplitude modulation |
US6614857B1 (en) * | 1999-04-23 | 2003-09-02 | Lucent Technologies Inc. | Iterative channel estimation and compensation based thereon |
US6493329B1 (en) * | 1999-08-23 | 2002-12-10 | Qualcomm Incorporated | Adaptive channel estimation in a wireless communication system |
US6700919B1 (en) * | 1999-11-30 | 2004-03-02 | Texas Instruments Incorporated | Channel estimation for communication system using weighted estimates based on pilot data and information data |
US6845104B2 (en) * | 2000-06-14 | 2005-01-18 | Ipr Licensing, Inc. | Receiver for time division multiplex system without explicit time slot assignment |
FI111886B (fi) * | 2000-12-08 | 2003-09-30 | Nokia Corp | Tiedonkäsittelymenetelmä |
DE50106151D1 (de) * | 2000-12-28 | 2005-06-09 | Com Res Gmbh Solutions For Com | Empfänger zur Interferenzunterdrückung für TDMA-und/oder FDMA-Übertragung |
GB2370952B (en) * | 2001-01-05 | 2003-04-09 | British Broadcasting Corp | Improvements in channel state measurement and in discriminating digital values from a received signal suitable for use with OFDM signals |
US20020136331A1 (en) * | 2001-01-24 | 2002-09-26 | Leif Wilhelmsson | Method and apparatus for performing channel estimation with a limiting receiver |
US6940914B1 (en) | 2001-06-11 | 2005-09-06 | Cingular Wireless Ii, Llc | Turbo channel estimation for OFDM systems |
US6999538B2 (en) * | 2001-09-10 | 2006-02-14 | Mitsubishi Electric Research Laboratories, Inc. | Dynamic diversity combiner with associative memory model for recovering signals in communication systems |
US20040165683A1 (en) * | 2002-09-04 | 2004-08-26 | Gupta Alok Kumar | Channel estimation for communication systems |
US7639600B1 (en) * | 2003-02-12 | 2009-12-29 | Marvell International Ltd. | Low complexity channel estimation for orthogonal frequency division modulation systems |
GB2409604B (en) * | 2003-12-22 | 2006-02-08 | Toshiba Res Europ Ltd | Method and apparatus for recovering timing in packet based wireless network. |
EP1794961A2 (en) * | 2004-09-10 | 2007-06-13 | TTP Com Limited | Refinement of a channel response calculation |
US7924934B2 (en) * | 2006-04-07 | 2011-04-12 | Airbiquity, Inc. | Time diversity voice channel data communications |
CN101166167B (zh) * | 2006-10-20 | 2010-09-22 | 北京新岸线无线技术有限公司 | 用于正交频分复用802.11系统的信道估计方法及装置 |
TW201039574A (en) * | 2009-04-22 | 2010-11-01 | Ralink Technology Corp | Method of detecting transmission channel and a wireless communication system using the same |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5136612A (en) * | 1990-12-31 | 1992-08-04 | At&T Bell Laboratories | Method and apparatus for reducing effects of multiple access interference in a radio receiver in a code division multiple access communication system |
JP2643792B2 (ja) * | 1993-09-14 | 1997-08-20 | 日本電気株式会社 | 復調装置 |
-
1996
- 1996-01-04 US US08/582,691 patent/US5687198A/en not_active Expired - Fee Related
- 1996-10-28 CN CN96192349A patent/CN1084089C/zh not_active Expired - Fee Related
- 1996-10-28 BR BR9607811A patent/BR9607811A/pt not_active IP Right Cessation
- 1996-10-28 WO PCT/US1996/017288 patent/WO1997025780A1/en active IP Right Grant
- 1996-10-28 JP JP52517997A patent/JP3881024B2/ja not_active Expired - Fee Related
- 1996-10-28 KR KR1019970706168A patent/KR100260862B1/ko not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004501525A (ja) * | 2000-01-14 | 2004-01-15 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | データ伝送装置を同期するための方法および装置 |
US6993308B2 (en) | 2000-07-26 | 2006-01-31 | Matsushita Electric Industrial Co., Ltd. | Radio receiving device and radio receiving method |
Also Published As
Publication number | Publication date |
---|---|
CN1084089C (zh) | 2002-05-01 |
BR9607811A (pt) | 1998-07-07 |
KR19980702761A (ko) | 1998-08-05 |
JP3881024B2 (ja) | 2007-02-14 |
KR100260862B1 (ko) | 2000-07-01 |
CN1177428A (zh) | 1998-03-25 |
US5687198A (en) | 1997-11-11 |
WO1997025780A1 (en) | 1997-07-17 |
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