Communication system with receivers employing generalized...

Details Communication system with receivers employing generalized... Communication system with receivers employing generalized...

2006-07-18

2006-07-18

Tse, Young T. (Department: 2637)

Pulse or digital communications

Spread spectrum

Direct sequence

C370S210000, C370S342000

Reexamination Certificate

active

07079570

ABSTRACT:
A wireless communication system comprises first and second communication stations which send and receive symbols in signals in a shared spectrum. The symbols are recovered from the received signals. Codes of the signals are processed using a block Fourier transform (FT), producing a code block diagonal matrix. A channel response matrix is estimated. The channel response matrix is extended and modified to produce a block circulant matrix, and a block FT is taken producing a channel response block diagonal matrix. The code block diagonal matrix is combined with the channel response block diagonal matrix. The received signals are sampled and processed using the combined code block diagonal matrix and channel response block diagonal matrix with a Cholesky algorithm. A block inverse FT is performed on a result of the Cholesky algorithm to produce spread symbols. The spread symbols are despread to recover symbols of the received signals.

REFERENCES:
patent: 6122015 (2000-09-01), Al-Dhahir et al.
patent: 6625203 (2003-09-01), De et al.
patent: 6928104 (2005-08-01), Pan et al.
patent: 2003/0095586 (2003-05-01), Geers
patent: 2004/0013171 (2004-01-01), Pan et al.
patent: 2004/0136316 (2004-07-01), Kwak et al.
Pan et al., “Low Complexity Data Detection Using Fast Fourier Transform Decomposition of Channel Correlation Matrix,” InterDigital Communications Corp., Nov. 2001.
Vollmer et al., “Joint-Detection Using Fast Fourier Transforms in TD-CDMA Based Mobile Radio Systems”, Proceedings of the International Conference on Telecommunications, 1999, pp. 1-7.
Vollmer et al., “Comparative Study of Joint-Detection Techniques for TD-CDMA Based Mobile Radio Systems”, 2001 IEEE Journal on Selected Areas in Communications, vol. 19, No. 8, Aug. 2001, pp. 1461-1475.

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