Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2005-08-30
2009-10-27
Tran, Khanh C (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
Reexamination Certificate
active
07609754
ABSTRACT:
A method of processing a received communication signal comprises calculating a traffic-to-pilot scaling factor by relating data correlations determined from despread traffic values obtained from the received communication signal-to-noise correlations determined from despread pilot values obtained from the received communication signal, and generating traffic symbol estimates by combining corresponding ones of the despread traffic values using combining weights calculated from the data correlations. Generating combining weights in this manner provides, among other things, Minimum Mean Square Error (MMSE) estimations for the received traffic symbols that inherently are properly scaled in amplitude relative to symbol values in a reference modulation constellation. By obtaining proper scaling as part of combining weight generation, the receiver need not make an explicit estimate of symbol power to obtain proper soft value information, and the estimated traffic symbols may be compared directly with the reference constellation.
REFERENCES:
patent: 6069912 (2000-05-01), Sawahashi et al.
patent: 6108375 (2000-08-01), Farrokh et al.
patent: 6154503 (2000-11-01), Strolle
patent: 6363104 (2002-03-01), Bottomley et al.
patent: 6430214 (2002-08-01), Jalloul et al.
patent: 6452917 (2002-09-01), Leung
patent: 6570909 (2003-05-01), Kansakoski et al.
patent: 6671268 (2003-12-01), Leung
patent: 7133688 (2006-11-01), Das et al.
patent: 7236514 (2007-06-01), Bottomley et al.
patent: 7269205 (2007-09-01), Wang
patent: 7486716 (2009-02-01), Fulghum et al.
patent: 2002/0051485 (2002-05-01), Bottomley et al.
patent: 2002/0080863 (2002-06-01), Nielsen
patent: 2002/0141505 (2002-10-01), Lundby
patent: 2003/0031278 (2003-02-01), Kang et al.
patent: 2003/0067968 (2003-04-01), Papasakellariou et al.
patent: 2003/0092447 (2003-05-01), Bottomley et al.
patent: 2003/0133520 (2003-07-01), Jayaraman et al.
patent: 2003/0156563 (2003-08-01), Papasakellariou et al.
patent: 2004/0048619 (2004-03-01), Kim et al.
patent: 2004/0066773 (2004-04-01), Sun et al.
patent: 2004/0096015 (2004-05-01), Ishii et al.
patent: 2004/0264589 (2004-12-01), Kenney et al.
patent: 2004/0264590 (2004-12-01), Kenney et al.
patent: 2004/0264591 (2004-12-01), Malm et al.
patent: 2005/0002478 (2005-01-01), Agami et al.
patent: 2005/0069023 (2005-03-01), Bottomley et al.
patent: 2005/0111528 (2005-05-01), Fulghum et al.
patent: 2005/0163199 (2005-07-01), Wang
patent: 2005/0201447 (2005-09-01), Cairns et al.
patent: 2006/0003784 (2006-01-01), Chion et al.
patent: 2006/0018367 (2006-01-01), Bui
patent: 0 639 915 (1995-02-01), None
patent: 1 191 713 (2002-03-01), None
patent: 1 422 896 (2004-05-01), None
Zhu, Jie et al., “Channel Estimation with Power-Controlled Pilot Symbols and Decision-Directed Reference Symbols”; 2003; 5 pages; Fayetteville, Arkansas, USA.
Lee, Jungwoo, “Log Likelihood Ratio Calculation Without SNR Estimation for Forward Line DS-CDMA Receivers”; IEE Signal Processing Letters; Jun. 2004; 4 pages; vol. 11 No. 6.
Wong, Kainam Thomas et. al. “A Self-Decorrelating” Technique to Enhance Blind Space-Time RAKE Receivers with Single-User-Type DS-CDMA Detector; 2001; 5 pages.
Schramm, Peter, “Analysis and Optimization of Pilot-Channel-Assisted BPSK for DS-CDMA Systems”; IEE Transactions on Communications; Sep. 1998; 3 pages; vol. 46, No. 9.
Shin, Simon et. al., “CDMA200 1X Performance Comparison with Pilot Power Ratio”; 2002 International Zurich Seminar on Broadband Communications; Feb. 19-21, 2002; 6 pages.
Sung, Younchul et. al., “Blind Channel Tracking for Long-Code WCDMA With Linear Interpolation Model”; 2002; 5 pages.
Zesong, Fei et. al., “Improved Binary Turbo Coded Modulation with 16QAM in HSDPA”; 2003; 4 pages.
Zheng, Kan et. al., “Analysis and Optimization of Pilot-Symbol-Assisted MC-CDMA Systems”; WCNC-IEE Communications Society; 2004; 5 pages.
Signaling of CPICH and DSCH power ratio for M-ary demodulation, AH24: High Speed Downlink Packet Transmission; TSG-RAN Working Group Meeting #16; Pusan, Korea, Sep. 10-13, 2000; 2 pages.
UE complexity for AMCS; AH24: High Speed Downlink Packet Transmission; TSG-RAN Working Group Meeting #18, Boston, MA; Jan. 15-18, 2001; 6 pages.
Choi, BJ et. al., “Rake Receiver Detection of Adaptive Modulation Aided CDMA over Frequency Selective Channels”; In Proceedings of VTC 2001 (Fall), Atlantic City; 5 pages.
Parkvall, et. al., Evolving WCDMA for Improved High Speed Mobile Internet; Proc. Future Telecommunications Conference 2001, Beijing, China, Nov. 28-30, 2001; 5 pages.
Wang et. al., “Generalized RAKE Reception for Canceling Interference from Multiple Base Stations”; Proc. IEE Vehicular Technology Conference, Boston; Sept. 24-28, 2000; 7 pages.
Bottomley, G. et. al., “A Generalized RAKE Receiver for Interference Suppression”; IEE Journal on Selected Areas in Communications, vol. 18, No. 8, Aug. 2000; 10 pages.
A Method for Blind Determination of Pilot to Data Power Ration for QAM Signals, TSG-RAN Working Group 1, Meeting # 21, Aug. 2001.
Codenie, J. et. al., “Implementation Of A Digital Amplitude Detector Based on the Cordic Transform”; 1997; 4 pages.
Efstathiou, Dimitrios et.al., “Preamble-Less Nondecision-Aided (NDA) Feedforward Synchronization Techniques for 16-QAM TDMA Demodulator”; IEE Transactions on Vehicular Technology; May 1998; 13 pp.; vol. 47 No. 2.
Huang, Yuheng et. al., “Joint Iterative Estimation and Decoding for 16-QAM BICM over Correlated Fading Channels”; Nov. 2002; 5 pages.
Huang, Yueng et. al., “Joint interative estimation and decoding for 16-QAM over correlated fading channels”; yuhengabstract.htm; 2004; 2 pages.
Hai et. al., “Approaches for fast, adaptive, generalized rake reception”; Research Disclosure Journal; Kenneth Mason Publications; Research Disclosure Database No. 475041; Nov. 2003.
Coats & Bennett P.L.L.C.
Telefonaktiebolaget LM Ericsson (publ)
Tran Khanh C
LandOfFree
Method and apparatus for received communication signal... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for received communication signal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for received communication signal... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4078954