Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2004-06-22
2010-02-09
Bayard, Emmanuel (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S233000
Reexamination Certificate
active
07660340
ABSTRACT:
The method of receiver processing of CDMA signals in a CDMA system includes first converting a received signal in the time domain to a received signal in the frequency domain, and equalizing the received signal in the frequency domain using a set of frequency domain weights. The equalized received signal in the frequency domain is converted to an equalized received signal in the time domain. The set of frequency domain weights are adaptively adjusted at a symbol rate of the received signal in the time domain based on an error signal produced from the received signal in the frequency domain and a frequency domain representation of a known pilot signal of the CDMA system.
REFERENCES:
patent: 4658426 (1987-04-01), Chabries et al.
patent: 4939685 (1990-07-01), Feintuch
patent: 5481570 (1996-01-01), Winters
patent: 6912258 (2005-06-01), Birru
patent: 7054354 (2006-05-01), Gorokhov et al.
patent: 7075967 (2006-07-01), Struhsaker et al.
patent: 7212569 (2007-05-01), Clark
patent: 2001/0033614 (2001-10-01), Hudson
patent: 2002/0070796 (2002-06-01), Gay-Bellile et al.
patent: 2003/0007554 (2003-01-01), Birru
patent: 2004/0076239 (2004-04-01), Yu et al.
patent: 2004/0142665 (2004-07-01), Papathanasion et al.
patent: 2004/0223480 (2004-11-01), Nguyen et al.
patent: 2005/0117532 (2005-06-01), Zhang et al.
patent: 2005/0122947 (2005-06-01), Wang et al.
patent: 1 289 182 (2002-03-01), None
Mailaender, Laurence. “Linear MIMO Chip Equalization for the CDMA Downlink.” 2003 4thIEEE Workshop on Signal Processing Advances in Wireless Communications, Jun. 2003, pp. 299-303.
Dmochowski, Pawel A. et al. “Frequency Domain Equalization for High Data Rate Multipath Channels.” 2001 IEEE Pacific Rim Conference On Communications, Computers and Signal Processing; Aug. 26, 2001; pp. 534-537.
Clark, Martin V. “Adaptive Frequency-Domain Equalization and Diversity Combining for Broadband Wireless Communications.” Vehicular Technology Conference, 1998. IEEE, May 18, 1998; pp. 409-413.
Burg, A. et al. “Practical Low Complexity Linear Equalization for MIMO-CDMA Systems.” Conference Record of the 37thAsilomar Conference on Signals, Systems and Computers; Nov. 9, 2003; pp. 1266-1272.
Mailaender, Laurence. Adaptive Frequency-Domain Chip Equalization for the MIMO CDMA Downlink. Vehicular Technology Conference; Sep. 26, 2004; pp. 1766-1770.
European Search Report dated Oct. 4, 2005.
Ghauri, Irfan et al. “Linear Receivers for the DS-CDMA Downlink Exploiting Orthogonality of Spreading Sequences.” IEEE 1998, pp. 650-653.
Frank, Colin D. et al. “Adaptive Interference Suppression for Direct-Sequence CDMA Systems with Long Spreading Codes.” Proc. Of 36thAllerton Conference, Sep. 1998, pp. 411-419.
Krauss, Thomas P., et al. “MMSE Equalization for Forward Link in 3G CDMA: Symbol-Level Versus Chip-Level.”IEEE, 2000, pp. 18-22.
Petre, Frederik, et al. “Pilot-aided Adaptive Chip Equalizer Receiver for Interference Suppression in DS-CDMA Forward Link.”IEEE, 2000, pp. 303-308.
Mailaender, Laurence. “Linear MIMO Chip Equalization for the CDMA Downlink.” Proc. Of IEEE Signal Processing Advances in Wireless Communications, Rome, Italy, 2003.
Shynk, John J. “Frequency-Domain and Multirate Adaptive Filtering.”IEEE SP Magazine, Jan. 1992, pp. 14-37.
Mansour, David et al. “Unconstrained Frequency-Domain Adaptive Filter.”IEEE, 1982, pp. 726-734.
Clark, Gregory A. et al. “A Unified Approach to Time- and Frequency-Domain Realization of FIR Adaptive Digital Filters.”IEEE Transactions On Acoustics, Speech, and Signal Processing, vol. ASSP-31, No. 5, Oct. 1983, pp. 1073-1083.
Lee, Jae Chon. “Performance of Transform-Domain LMS Adaptive Digital Filters.”IEEE Transactions On Acoustics, Speech, and Signal Processing, vol. ASSP-34, No. 3, Jun. 1986, pp. 499-510.
Burg, A., et al. “Low Complexity Frequency Domain Equalization of MIMO Channels with Applications to MIMO-CDMA Systems.”IEEE, 2003, pp. 468-472.
Alcatel-Lucent USA Inc.
Bayard Emmanuel
Harness Dickey & Pierce
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