JP5597209B2 - 受信機 - Google Patents
受信機 Download PDFInfo
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- JP5597209B2 JP5597209B2 JP2011548000A JP2011548000A JP5597209B2 JP 5597209 B2 JP5597209 B2 JP 5597209B2 JP 2011548000 A JP2011548000 A JP 2011548000A JP 2011548000 A JP2011548000 A JP 2011548000A JP 5597209 B2 JP5597209 B2 JP 5597209B2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
-
- 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
- H04L25/024—Channel estimation channel estimation algorithms
- H04L25/025—Channel estimation channel estimation algorithms using least-mean-square [LMS] method
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
-
- 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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Radio Transmission System (AREA)
Description
Claims (14)
- OFDM信号の受信機であって、
データおよびパイロット信号の両方を有する受信OFDMシンボルからのパイロット信号に基づき、前記受信OFDMシンボルが送信されたチャネルの初期時間領域チャネル推定を生成する初期チャネル推定器と、
前記初期時間領域チャネル推定を受信するために結合された時間領域チャネル推定器であって、前記初期時間領域チャネル推定を利用して、前記受信OFDMシンボルが送信された前記時間領域チャネルをより正確に特徴づけるさらなる時間領域チャネル推定を生成する時間領域チャネル推定器と、
前記さらなる時間領域チャネル推定に基づき、前記受信OFDMシンボルに応答する等化信号を出力する周波数イコライザと、
前記等化信号に対応する出力情報を提供する出力と、を備える受信機。 - 前記時間領域チャネル推定器は、一つのOFDMシンボルについての情報を使用して前記さらなる時間領域チャネル推定を生成する、請求項1に記載の受信機。
- OFDM信号の受信機であって、
データおよびパイロット信号の両方を有する受信OFDMシンボルからのパイロット信号に基づき、前記受信OFDMシンボルが送信されたチャネルの初期時間領域チャネル推定を生成し、前記初期時間領域チャネル推定を利用して、前記受信OFDMシンボルが送信された前記時間領域チャネルをより正確に特徴づけるさらなる時間領域チャネル推定を生成するチャネル推定器と、
前記さらなる時間領域チャネル推定に基づき、前記受信OFDMシンボルに応答する等化信号を出力する周波数イコライザと、
前記等化信号に対応する出力情報を提供する出力と、を備え、
前記チャネル推定器は、受信OFDMシンボルの少なくとも一部の自動共分散行列を決定して、前記自動共分散行列の少なくとも一部を使用して前記さらなる時間領域チャネル推定を生成する、受信機。 - 前記チャネル推定器は、前記自動共分散行列から算出される少なくとも一つの基底ベクトルを生成し、前記少なくとも一つの基底ベクトルに関して一つの座標を決定し、前記少なくとも一つの座標および前記少なくとも一つの基底ベクトルを利用して、前記さらなる時間領域チャネル推定を生成する、請求項3に記載の受信機。
- OFDM信号の受信機であって、
データおよびパイロット信号の両方を有する受信OFDMシンボルからのパイロット信号に基づき、前記受信OFDMシンボルが送信されたチャネルの初期時間領域チャネル推定を生成し、前記初期時間領域チャネル推定を利用して、前記受信OFDMシンボルが送信された前記時間領域チャネルをより正確に特徴づけるさらなる時間領域チャネル推定を生成するチャネル推定器と、
前記さらなる時間領域チャネル推定に基づき、前記受信OFDMシンボルに応答する等化信号を出力する周波数イコライザと、
前記等化信号に対応する出力情報を提供する出力と、を備え、
前記チャネル推定器は、前記さらなる時間領域チャネル推定の決定の前に、前記初期時間領域チャネル推定の次元低減表現を生成する、受信機。 - OFDM信号の受信機であって、
データおよびパイロット信号の両方を有する受信OFDMシンボルからのパイロット信号に基づき、前記受信OFDMシンボルが送信されたチャネルの初期時間領域チャネル推定を生成し、前記初期時間領域チャネル推定を利用して、前記受信OFDMシンボルが送信された前記時間領域チャネルをより正確に特徴づけるさらなる時間領域チャネル推定を生成するチャネル推定器と、
前記さらなる時間領域チャネル推定に基づき、前記受信OFDMシンボルに応答する等化信号を出力する周波数イコライザと、
前記等化信号に対応する出力情報を提供する出力と、を備え、
前記チャネル推定器は、OFDMシンボルの少なくとも一部からなる自動共分散行列の少なくとも一部を使用して、少なくとも第1のベクトルを決定し、また、前記チャネル推定器は、前記第1のベクトルに関して少なくとも一つの座標を決定し、前記少なくとも一つの座標と前記第1のベクトルとを、前記さらなる時間領域チャネル推定の生成において使用する、受信機。 - 前記チャネル推定器は、各受信OFDMシンボルについて前記自動共分散行列を生成する、請求項6に記載の受信機。
- 前記時間領域チャネル推定器は、前記初期時間領域チャネル推定を受信して、基底ベクトルのセットを生成し、前記基底ベクトルのセットと前記基底ベクトルのセットに対して定義された座標のセットとの組み合わせとして時間領域チャネル補正を生成し、前記初期時間領域チャネル推定を前記時間領域チャネル補正に加算して、前記さらなる時間領域チャネル推定を生成する、請求項1に記載の受信機。
- 前記時間領域チャネル推定器は、前記初期時間領域チャネル推定および入力信号から前記時間領域チャネル補正を生成するときに、複数のパイロットを含むベクトルから生成された自動相関行列の少なくとも一部に基づいている、請求項8に記載の受信機。
- 前記さらなる時間領域チャネル推定は、最小二乗の最小誤差チャネル推定である、請求項1〜9のいずれか1項に記載の受信機。
- 前記時間領域チャネル推定器は、反復処理を利用して、前記さらなる時間領域チャネル推定を生成する、請求項1、2、8または9のいずれか1項に記載の受信機。
- 前記時間領域チャネル推定器から干渉チャネルの時間領域チャネル推定を受信し、受信した入力信号の干渉信号部分の少なくとも一部をキャンセルする干渉低減モジュールをさらに備える、請求項1、2、8または9のいずれか1項に記載の受信機。
- 前記初期チャネル推定器は、前記受信OFDM信号を含む受信信号と前記受信機によって提供された参照信号とを相互相関させることによって前記初期時間領域チャネル推定を生成する、請求項1、2、8または9のいずれか1項に記載の受信機。
- 前記参照信号は、時間領域信号であって、生成されたパイロット信号と変調された零値データ信号とを含む、請求項13に記載の受信機。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US12/365,805 | 2009-02-04 | ||
US12/365,805 US8761274B2 (en) | 2009-02-04 | 2009-02-04 | Least squares channel identification for OFDM systems |
PCT/US2010/020433 WO2010090787A1 (en) | 2009-02-04 | 2010-01-08 | Two-steps least squares time domain channel estimation for ofdm systems |
Publications (2)
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JP2012516641A JP2012516641A (ja) | 2012-07-19 |
JP5597209B2 true JP5597209B2 (ja) | 2014-10-01 |
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US (1) | US8761274B2 (ja) |
EP (2) | EP2374251B1 (ja) |
JP (1) | JP5597209B2 (ja) |
KR (1) | KR101247461B1 (ja) |
CN (1) | CN102308541B (ja) |
BR (1) | BRPI1005678A2 (ja) |
CA (1) | CA2749707C (ja) |
WO (1) | WO2010090787A1 (ja) |
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CN102308541B (zh) | 2016-05-25 |
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BRPI1005678A2 (pt) | 2016-02-23 |
CA2749707C (en) | 2017-09-05 |
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US8761274B2 (en) | 2014-06-24 |
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EP2852073B1 (en) | 2017-05-31 |
US20100195774A1 (en) | 2010-08-05 |
WO2010090787A1 (en) | 2010-08-12 |
KR20110129882A (ko) | 2011-12-02 |
EP2852073A2 (en) | 2015-03-25 |
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