KR100698532B1 - 시공간 부호화된 ds-cdma 통신 시스템에서적응스텝크기 알고리듬을 사용하여 수신신호를 복호하는방법 - Google Patents
시공간 부호화된 ds-cdma 통신 시스템에서적응스텝크기 알고리듬을 사용하여 수신신호를 복호하는방법 Download PDFInfo
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- KR100698532B1 KR100698532B1 KR1020040080708A KR20040080708A KR100698532B1 KR 100698532 B1 KR100698532 B1 KR 100698532B1 KR 1020040080708 A KR1020040080708 A KR 1020040080708A KR 20040080708 A KR20040080708 A KR 20040080708A KR 100698532 B1 KR100698532 B1 KR 100698532B1
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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
- H04B1/7073—Synchronisation aspects
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
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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
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
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Abstract
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Claims (7)
- 삭제
- 삭제
- 하나 이상의 송신 안테나 및 복수의 수신 안테나 사이에 존재하는 통신 채널에서 시공간 부호화된 직접시퀀스(DS)-CDMA 통신 시스템의 수신신호 복호 방법에 있어서,p번째 경로의 k번째 사용자에 대하여, m번째 수신 안테나에서 i번째 심볼구간의 수신 심볼로 결정된 에 대응하는 역확산신호 와 i번째 심볼구간의 수신신호 r(i)의 역확산신호 간의 오차값을 구하는 단계(a);수신신호를 역확산하기 위한 탭가중치 벡터의 갱신 단위인 스텝 크기를, 상기 단계(a)에서 구한 오차값을 이용하여 조정하는 단계(b);상기 단계(a)에서 구한 오차값 및 상기 단계(b)에서 구한 스텝 크기를 이용하여 상기 탭가중치 벡터를 갱신하는 단계(c); 및상기 단계(c)에서 구한 탭가중치 벡터를 사용하여 i+1번째 심볼구간의 수신신호 r(i+1)을 역확산하는 단계(d)를 포함하되,상기 단계(b)에서 상기 스텝크기는 최소평균제곱(LMS, Least Mean Square) 알고리듬에 의하여 조정되며, i+1번째 심볼구간에 적용되는 스텝크기 μ(i+1)은 하기 수학식 1에 의하여 구하는 것을 특징으로 하는 수신신호 복호방법:[수학식 1]상기식에서,α는 최소평균제곱 알고리듬의 학습률이고,r(i)는 i번째 심볼구간의 수신신호이고,T는 전치연산기호이며,
- 제 4 항에 있어서, 상기 단계(c)에서 상기 탭가중치 벡터는 복소 최소평균제곱(LMS, Least Mean Square) 알고리듬에 의하여 갱신되는 것을 특징으로 하는 방법.
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KR1020040080708A KR100698532B1 (ko) | 2004-10-09 | 2004-10-09 | 시공간 부호화된 ds-cdma 통신 시스템에서적응스텝크기 알고리듬을 사용하여 수신신호를 복호하는방법 |
US11/114,508 US7492808B2 (en) | 2004-10-09 | 2005-04-26 | Decoding method using adaptive step-size algorithm for a space-time coded DS-CDMA system |
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KR1020040080708A KR100698532B1 (ko) | 2004-10-09 | 2004-10-09 | 시공간 부호화된 ds-cdma 통신 시스템에서적응스텝크기 알고리듬을 사용하여 수신신호를 복호하는방법 |
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KR20060031736A KR20060031736A (ko) | 2006-04-13 |
KR100698532B1 true KR100698532B1 (ko) | 2007-03-22 |
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KR1020040080708A KR100698532B1 (ko) | 2004-10-09 | 2004-10-09 | 시공간 부호화된 ds-cdma 통신 시스템에서적응스텝크기 알고리듬을 사용하여 수신신호를 복호하는방법 |
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US7715508B2 (en) | 2005-11-15 | 2010-05-11 | Tensorcomm, Incorporated | Iterative interference cancellation using mixed feedback weights and stabilizing step sizes |
US8005128B1 (en) * | 2003-09-23 | 2011-08-23 | Rambus Inc. | Methods for estimation and interference cancellation for signal processing |
US7905872B2 (en) * | 2004-06-04 | 2011-03-15 | The Procter & Gamble Company | Absorbent articles comprising a slow recovery stretch laminate |
US7717893B2 (en) | 2004-06-04 | 2010-05-18 | The Procter & Gamble Company | Absorbent articles comprising a slow recovery elastomer |
US8419701B2 (en) * | 2005-01-10 | 2013-04-16 | The Procter & Gamble Company | Absorbent articles with stretch zones comprising slow recovery elastic materials |
EP1843728B1 (en) | 2005-01-26 | 2012-01-04 | The Procter & Gamble Company | Disposable pull-on diaper having a low force, slow recovery elastic waist |
US7711075B2 (en) | 2005-11-15 | 2010-05-04 | Tensorcomm Incorporated | Iterative interference cancellation using mixed feedback weights and stabilizing step sizes |
US7826516B2 (en) | 2005-11-15 | 2010-11-02 | Rambus Inc. | Iterative interference canceller for wireless multiple-access systems with multiple receive antennas |
US7991088B2 (en) * | 2005-11-15 | 2011-08-02 | Tommy Guess | Iterative interference cancellation using mixed feedback weights and stabilizing step sizes |
US7702048B2 (en) * | 2005-11-15 | 2010-04-20 | Tensorcomm, Incorporated | Iterative interference cancellation using mixed feedback weights and stabilizing step sizes |
US20070110135A1 (en) * | 2005-11-15 | 2007-05-17 | Tommy Guess | Iterative interference cancellation for MIMO-OFDM receivers |
US7623602B2 (en) * | 2005-11-15 | 2009-11-24 | Tensorcomm, Inc. | Iterative interference canceller for wireless multiple-access systems employing closed loop transmit diversity |
US8323257B2 (en) | 2007-11-21 | 2012-12-04 | The Procter & Gamble Company | Absorbent articles comprising a slow recovery stretch laminate and method for making the same |
US9017305B2 (en) | 2010-11-12 | 2015-04-28 | The Procter Gamble Company | Elastomeric compositions that resist force loss and disintegration |
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US7301993B2 (en) * | 2002-09-13 | 2007-11-27 | Broadcom Corporation | Channel estimation in a spread spectrum receiver |
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