Wireless receiver and method employing forward/backward...

Details Wireless receiver and method employing forward/backward... Wireless receiver and method employing forward/backward...

2006-10-31

2006-10-31

Ha, Dac V. (Department: 2634)

Pulse or digital communications

Equalizers

C375S232000, C375S285000, C375S350000, C455S307000

Reexamination Certificate

active

07130342

ABSTRACT:
A wireless receiver and method employs a forward/backward recursive covariance based filter coefficient generation scheme for equalizing a received wireless signal, such as a CDMA signal or other suitable signal. A forward/backward recursive covariance based filter coefficient generating circuit (206) includes a forward recursion portion (300) that receives data representing channel estimates (18) of a communication channel, and data representing an auto-covariance matrix (22). The forward recursion portion (300) produces a set of output values (306) from each iteration stage (400a–400n) of the forward recursion portion (300). The set of output values (306) are stored and a backward recursion portion (302) obtains the set of output values (306) and also receives the data representing the auto-covariance matrix (22), and generates filter coefficients (208) based on this information.

REFERENCES:
patent: 6658071 (2003-12-01), Cheng
patent: 6952460 (2005-10-01), Van Wechel et al.
patent: 6954495 (2005-10-01), Piirainen
Yakun Sun, Reduced-rank Adaptive Equalization, Northwestern University, Evanston, Illinois, Jan. 30, 2001.
David C. Ricks and J. Scott Goldstein, Efficient Architectures for Implementing Adaptive Algorithms, Proceedings of the 2000 Antenna Applications Symposium, Allerton Park, Monticello, Illinois, Sep. 20-22, 2000.

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