Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2005-06-07
2005-06-07
Chin, Stephen (Department: 2634)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S148000, C375S219000, C375S232000
Reexamination Certificate
active
06904078
ABSTRACT:
A CDMA receiver and a CDMA transceiver are provided which have high resistance to fading fluctuations, and carry out highly accurate channel estimation, considering the rate of channel fluctuations. When carrying out the channel estimation by calculating weighted sums of the (average values of) pilot symbols interposed into a data symbol sequence, the weighting control is performed considering the rate of the channel fluctuations. For example, the weighting control is carried out using, as its update values, inner products of the channel estimation values and the (average values of) pilot symbols. This makes it possible to achieve the highly accurate channel estimation.
REFERENCES:
patent: 5694388 (1997-12-01), Sawahashi et al.
patent: 5724378 (1998-03-01), Miki et al.
patent: 5930288 (1999-07-01), Eberhardt
patent: 6496534 (2002-12-01), Shimizu et al.
patent: 0715440 (1996-06-01), None
patent: 07-231285 (1995-08-01), None
patent: WO 95/35615 (1995-12-01), None
patent: 08335898 (1996-12-01), None
patent: 09008770 (1997-01-01), None
patent: 09-064933 (1997-03-01), None
patent: 09-186635 (1997-07-01), None
patent: 09-232994 (1997-09-01), None
patent: 10051424 (1998-02-01), None
patent: 11-127208 (1999-05-01), None
patent: 11-186990 (1999-07-01), None
patent: WO 97/45970 (1997-12-01), None
patent: WO 98/10542 (1998-03-01), None
The Performance of Channel Estimation Method Using Adaptive Meighted Multi-Symbol Averaging (WMSA) With Pilot Channel in DS-CDMA Sadayuki Abeta, Mamoru Sawahashi, Fumiyuki Adachi.
Channel Estimation Using Time Multiplexed Pilot Symbols for Coherent Rake Combining for DS-CDMA Mobile Radio H. Andoh, M. Sawahashi & F. Adachi 1997 IEEE p. 954-958.
Seeichi Sampei and Terumi Sunaga, “Rayleigh Fading Compensation for QAM in Land Mobile Radio Communications”, IEEE Trans. Vehicular Technol. VT-42, No. 2, May 1993.
Seeichi Sampei, “Rayleigh Fading Compensation Method for 16QAM MODEM in Digital Land Mobile Radio Systems”.
Hidehiro Andoh et al., “Channel Estimation Filter Using Time-Multiplexed Pilot Channel for Coherent RAKE Combining in DS-CDMA”, Mobile Radio, IEICE Trans. Commun. vol. 81-B, No. 7, Jul. 1998.
H. Andoh et al. “Performance of Pilot Symbols-Assisted Coherent RAKE Receiver Using Weighted Multi-Slot Averaging for DS-CDMA Mobile Radio”, Technical Report of IEICE. RCS97-74 (Jul. 1997).
Sadayuki Abeta et al., “Performance Comparison Between Time-Multiplexed Pilot Channel and Parallel Pilot Channel for Coherent Rake Combining in DS-CDMA Mobile Radio”, IEICE Trans. Commun. vol. 81-B, No. 7, Jul. 1998.
Sadayuki Abeta et al., “The Performance of Channel Estimation method using Weighted Multi-Symbol Averaging (WMSA) with Pilot Channel in DS-CDMA”, Technical Report of IEICE. RCS97-163 (Nov. 1997).
Sadayuki Abeta et al., “DS/CDMA Coherent Detection System with a Suppressed Pilot Channel”, IEEE Globecom'94 pp. 1622-1626, 1994.
Sadayuki Abeta et al., “A Coherent Detection System with a Supressed Pilot Channel for DS/CDMA Systems”, unknown publisher, 1994.
Abeta Sadayuki
Adachi Fumiyuki
Sawahashi Mamoru
Chin Stephen
Odom Curtis
Workman Nydegger
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