JP5289672B2 - 信号の非パイロット部分を使用してチャネル推定値を生成するための方法および装置 - Google Patents
信号の非パイロット部分を使用してチャネル推定値を生成するための方法および装置 Download PDFInfo
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- JP5289672B2 JP5289672B2 JP2005272988A JP2005272988A JP5289672B2 JP 5289672 B2 JP5289672 B2 JP 5289672B2 JP 2005272988 A JP2005272988 A JP 2005272988A JP 2005272988 A JP2005272988 A JP 2005272988A JP 5289672 B2 JP5289672 B2 JP 5289672B2
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- 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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0064—Concatenated codes
- H04L1/0066—Parallel concatenated codes
-
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0047—Decoding adapted to other signal detection operation
- H04L1/005—Iterative decoding, including iteration between signal detection and decoding operation
-
- 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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0064—Concatenated codes
- H04L1/0065—Serial concatenated codes
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception
-
- 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
- H04L25/0238—Channel estimation using blind estimation
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Error Detection And Correction (AREA)
Description
pk+1(s)=pk(g1(s))fk(b)+pk(g0(s))
によって数学的に表すことができ、ただし、gj(s)は、入力ビットがjであるとき現在状態sに基づいて新状態を提供する関数であり、fk(b)は、上述の関数である。任意選択の正規化工程を実施し、pk(s)をすべてのsにわたって1にすることができる。
Claims (16)
- パイロット部分と非パイロット部分とを有する送信されたトラフィック信号を受信するように構成された受信器であって、
該トラフィック信号を受信するように構成されたRAKEコンバイナと、
該非パイロット部分内の組織ビットについて信頼性を示す対数尤度比を計算するように構成されたターボ復号器と、
該非パイロット部分内のパリティ・ビットについて信頼性値を示す対数尤度比を計算するように構成されたソフト・ターボ符号器とを含み、該パリティ・ビットについて信頼性値を示す該計算された対数尤度比は、該非パイロット部分内の該組織ビットについての該信頼性値を示す該対数尤度比に基づいて計算され、
該非パイロット部分内の該組織ビット及び該パリティ・ビットについて該信頼性値を示す該対数尤度比に少なくとも部分的に基づいてチャネル推定値を計算し、該チャネル推定値を該RAKEコンバイナに送るように構成されたチャネル推定器とを備える受信器。
- 請求項1に記載の受信器において、
該受信器が、
該パリティ・ビットについての信頼性値を示す該対数尤度比を該ソフト・ターボ符号器から受信し、
該信頼性値を示す該対数尤度比に基づいて、該送信されたトラフィック信号の一部分が信頼できるものであるかどうか判定し、
該送信されたトラフィック信号の該信頼できる部分を該チャネル推定器に送るように構成されたソフト変調器を含む受信器。
- 請求項2に記載の受信器において、
該ソフト変調器が、該組織ビット及び該パリティ・ビットについての対数尤度比が閾値を超えるか否かに基づいて、ある特定のシンボルについての確率を計算するように構成される受信器。
- 請求項2に記載の受信器において、該ソフト変調器が、該送信されたトラフィック信号の1つのシンボルの確率を計算するように構成される受信器。
- 請求項4に記載の受信器において、該ソフト変調器は、該1つのシンボル内の各々のビットについての対数尤度比が所定の閾値を超えるか否かを決定することによって、該1つのシンボルが信頼できるか否かを決定するように構成される受信器。
- 請求項1に記載の受信器において、
該送信されたトラフィック信号の複数の組織ビット及びパリティ・ビットについて、信頼性値を示す対数尤度比を計算するように構成されたターボ復号器と、
該信頼性値を示す該対数尤度比を該ターボ復号器から受信し、
該信頼性値を示す該対数尤度比に基づいて、該送信されたトラフィック信号の一部分が信頼できるものであるかどうか判定し、
該送信されたトラフィック信号の該信頼できる部分を該チャネル推定器に送るように構成されたソフト変調器とを含む受信器。
- 請求項6に記載の受信器において、該ターボ復号器が、該送信されたトラフィック信号の複数の組織ビット及びパリティ・ビットについて対数尤度比を計算するように構成される受信器。
- 請求項7に記載の受信器において、該ソフト変調器が、ある1つのシンボルを含む該複数の組織ビット及びパリティ・ビットについての対数尤度比が所定の閾値を超えているか否かを決定することによって、該送信されたトラフィック信号の該シンボルが信頼できるか否かを決定するように構成される受信器。
- 請求項1に記載の受信器において、該チャネル推定器は、RAKEコンバイナ内のRAKEフィンガに該チャネル推定値を送信するように構成される受信器。
- 請求項1に記載の受信器において、
該受信器が、RAKE合成済み信号を受信するように構成された復調器を備え、該チャネル推定器が、該RAKE合成済み信号の該非パイロット部分に基づいて該チャネル推定値を計算し、該チャネル推定値を該復調器に送るように構成される受信器。
- 請求項10に記載の受信器において、該復調器は、該チャネル推定器から受信した該チャネル推定値に基づいて該RAKE合成済み信号を復調するように構成される受信器。
- 信号受信の方法であって、
パイロット部分と非パイロット部分とを有する送信信号を受信するステップと、
ターボ復号器を使用して該非パイロット部分内の組織ビットについて信頼性値を示す対数尤度比を計算するステップと、
ソフト・ターボ符号器を使用して該非パイロット部分内のパリティ・ビットについて信頼性値を示す対数尤度比を計算するステップとを含み、該パリティ・ビットについて信頼性値を示す該計算された対数尤度比は、該非パイロット部分内の該組織ビットについての該信頼性値を示す該対数尤度比に基づいて計算され、
該非パイロット部分内の該組織ビット及び該パリティ・ビットについて該信頼性値を示す該対数尤度比に少なくとも部分的に基づいて、チャネル推定値を生成するステップと、
該チャネル推定値を、RAKEコンバイナに送るステップとを含む方法。
- 請求項12に記載の方法において、
該チャネル推定値を生成するステップが、該信頼性値に排他的に基づいて該チャネル推定値を生成するステップを含み、該信頼性値が該非パイロット部分に排他的に基づいて計算される方法。
- 請求項12に記載の方法において、該チャネル推定値をRAKEコンバイナに送るステップが、該RAKEコンバイナ内の複数のRAKEフィンガのうちの1つに該チャネル推定値を送るステップを含む方法。
- 請求項12に記載の方法において、該チャネル推定値をRAKEコンバイナに送るステップが、該チャネル推定値を復調器に送るステップを含む方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US10/950,725 | 2004-09-27 | ||
US10/950,725 US7660568B2 (en) | 2004-09-27 | 2004-09-27 | Method and apparatus for generating a channel estimate using a non-pilot portion of a signal |
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JP2006101508A JP2006101508A (ja) | 2006-04-13 |
JP5289672B2 true JP5289672B2 (ja) | 2013-09-11 |
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JP2005272988A Expired - Fee Related JP5289672B2 (ja) | 2004-09-27 | 2005-09-21 | 信号の非パイロット部分を使用してチャネル推定値を生成するための方法および装置 |
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US (1) | US7660568B2 (ja) |
EP (1) | EP1641135B1 (ja) |
JP (1) | JP5289672B2 (ja) |
KR (1) | KR101211940B1 (ja) |
CN (1) | CN1756102B (ja) |
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2004
- 2004-09-27 US US10/950,725 patent/US7660568B2/en active Active
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2005
- 2005-09-21 JP JP2005272988A patent/JP5289672B2/ja not_active Expired - Fee Related
- 2005-09-22 EP EP05255924.2A patent/EP1641135B1/en not_active Expired - Fee Related
- 2005-09-26 KR KR1020050089488A patent/KR101211940B1/ko not_active IP Right Cessation
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US20060068714A1 (en) | 2006-03-30 |
EP1641135A1 (en) | 2006-03-29 |
CN1756102B (zh) | 2011-03-16 |
JP2006101508A (ja) | 2006-04-13 |
EP1641135B1 (en) | 2014-07-16 |
KR20060051650A (ko) | 2006-05-19 |
US7660568B2 (en) | 2010-02-09 |
CN1756102A (zh) | 2006-04-05 |
KR101211940B1 (ko) | 2012-12-13 |
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