Method of noise factor computation for chip equalizer in...

Details Method of noise factor computation for chip equalizer in... Method of noise factor computation for chip equalizer in...

2005-07-19

2009-08-18

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S340000, C375S150000, C375S267000, C714S794000

Reexamination Certificate

active

07577187

ABSTRACT:
A method of noise factor computation for a chip equalizer in a spread spectrum receiver, the method including the steps of: computing channel and noise variance estimates for multiple resolvable fading paths of chip signals received at the spread spectrum receiver; computing the sum of power of the channel estimates; estimating the chip energy of the chip signals; and computing the noise factor from the chip energy estimate, channel and noise variance estimates, sum of power of the channel estimates, and spreading factor of the pilot signal.

REFERENCES:
patent: 7324583 (2008-01-01), Hooli et al.
patent: 2005/0276356 (2005-12-01), Hui
Bernardini et al., “One-Shot Digital Equalization for Nonlinear Modulations,” Conference Proceedings Article, Mar. 19, 1992, pp. 252-263.
Mailaender, Laurence, “Linear MIMO Chip Equalization for the CDMA Downlink,” Signal Processing Advances in Wireless Communications, Jun. 15, 2003, 4thIEEE Workshop on Signal Processing, pp. 299-303.
Qureshi, Shahid U.H., “Adaptive Equalization,” Proceedings of the IEEE, Sep. 1985, vol. 73, No. 9, pp. 1349-1387.
Zhang et al., “Efficient Linear Equalization for High Data Rate Downlink CDMA Signaling,” Institute of Electrical and Electronics Engineers, Conference Record of the 37thAsilomar Conference on Signals, Systems & Computers, Nov. 9, 2003, vol. 1 of 2, pp. 141-145.

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