JP2006025453A - 符号分割多元接続通信システムにおけるデータを回復する方法 - Google Patents
符号分割多元接続通信システムにおけるデータを回復する方法 Download PDFInfo
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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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
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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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/7103—Interference-related aspects the interference being multiple access interference
- H04B1/7105—Joint detection techniques, e.g. linear detectors
- H04B1/71055—Joint detection techniques, e.g. linear detectors using minimum mean squared error [MMSE] detector
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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
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/7103—Interference-related aspects the interference being multiple access interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
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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
- H04L25/0204—Channel estimation of multiple channels
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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
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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
- H04L25/0224—Channel estimation using sounding signals
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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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
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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
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- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
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- Radio Relay Systems (AREA)
Abstract
【解決手段】複数の通信(24、26、28)からのデータが符号分割多元アクセス通信システムにおいて伝送され、伝送された通信のデータは受信される(32、34、36)。利得係数(2)は、少なくとも1つの受信通信に対して決定される。受信した通信のデータは、決定された利得値から導かれるスケール係数(40)を使用して検出される。
【選択図】 図2
Description
図1AのUE20において、データは、適切な符号を使用して変調および拡散装置24によって拡散され、4位相偏移変調(QPSK)、M−ary直交振幅変調(QAM)または他の変調方式などを使用することによって変調される。拡散信号は、変調装置26によって無線周波数に変調され、アンテナ28またはアンテナアレイによって放射される。
Aは正規化シンボル応答行列である。Λは、信号振幅利得行列であり、対角行列である。nは雑音ベクトルである。
Hは、(Q・Ns+W−1)×Q・Nsの大きさであることが好ましい。Nsは、データ検出が行われるデータブロックごとのデータシンボルの数である。Qは、通信の拡散係数であり、Wは遅延拡散の長さである。Cは、Q・Ns×K・Nsの大きさであることが好ましい。
数式8に従い、MMSEの解法を適用してdを決定する。
Mは、Q・Nsの大きさであることが好ましい。数式10に示すように、行列Gは符号パワー行列である。
αjは、干渉および雑音レベルに基づいているj番目のUEの係数である。αjは、データ検出の最適パフォーマンスに対する干渉および雑音レベルに基づいて適応するように調整される必要がある。αjを導くための2つの好ましい数式は、数式28および数式29である。
αi,jは、j番目のUEのi番目のCCTrCHの係数である。
αn,i,jは、j番目のUEのi番目のCCTrCHのn番目の符号の係数である。αn,i,jを決定するための2つの好ましい数式は、数式32および数式33である。
Claims (6)
- 符号分割多元接続通信システムにおいて伝送された複数の通信からデータを回復する方法であって、
前記通信を受信するステップと、
前記受信した少なくとも1つの通信に対して利得係数を決定するステップと、
前記通信のチャネル応答および雑音分散を推定するステップと、
スケール係数を使用して前記雑音分散またはチャネル応答をスケーリングするステップであって、前記スケール係数は、受信した通信の少なくとも1つの利得係数から導かれるステップと、
前記スケール係数によってスケーリングされた、前記推定されたチャネル応答および前記雑音分散を使用して、受信した通信をチャネル等化するステップと、
前記チャネル等化された受信した通信を逆拡散して、受信した通信のデータを回復するステップと
を具えたことを特徴とする方法。 - 前記スケール係数を使用するデータ検出は、
前記スケール係数を使用してチャネル等化された、受信した通信をスケーリングするステップをさらに具えたことを特徴とする請求項1記載の方法。 - 前記少なくとも1つの利得係数は、対象とする通信の利得係数であることを特徴とする請求項1記載の方法。
- 前記スケール係数は、すべての受信した通信の利得係数から導かれることを特徴とする請求項1記載の方法。
- 前記スケール係数は、対象とする、コード化されたコンポジット トランスポート チャネル(CCTrCH:coded composite transport channel)の利得係数から導かれることを特徴とする請求項1記載の方法。
- 前記スケール係数を使用するデータ検出は、マルチユーザ検出装置を使用することを特徴とする請求項1記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US39682302P | 2002-07-18 | 2002-07-18 | |
US10/327,299 US6928104B2 (en) | 2002-07-18 | 2002-12-20 | Scaling using gain factors for use in data detection for wireless code division multiple access communication systems |
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JP2004534242A Division JP2005533460A (ja) | 2002-07-18 | 2003-07-09 | 無線符号分割多元接続通信システムのためのデータ検出用の利得係数を使用するスケーリング |
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JP2006025453A true JP2006025453A (ja) | 2006-01-26 |
JP4385015B2 JP4385015B2 (ja) | 2009-12-16 |
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JP2004534242A Ceased JP2005533460A (ja) | 2002-07-18 | 2003-07-09 | 無線符号分割多元接続通信システムのためのデータ検出用の利得係数を使用するスケーリング |
JP2005240061A Expired - Fee Related JP4385015B2 (ja) | 2002-07-18 | 2005-08-22 | 符号分割多元接続通信システムにおけるデータを回復する方法 |
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US (5) | US6928104B2 (ja) |
EP (1) | EP1523810B1 (ja) |
JP (2) | JP2005533460A (ja) |
KR (2) | KR20050098026A (ja) |
CN (1) | CN1768485B (ja) |
AT (1) | ATE395753T1 (ja) |
AU (1) | AU2003298522A1 (ja) |
CA (1) | CA2492677A1 (ja) |
DE (1) | DE60320996D1 (ja) |
ES (1) | ES2306915T3 (ja) |
MX (1) | MXPA05000786A (ja) |
NO (1) | NO20050601L (ja) |
TW (3) | TWI237456B (ja) |
WO (1) | WO2004023696A2 (ja) |
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