Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2005-02-09
2008-10-07
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S295000, C375S147000, C375S373000, C375S229000, C375S260000, C327S244000, C327S141000, C327S294000
Reexamination Certificate
active
07433392
ABSTRACT:
A wireless communications device may include a wireless receiver for receiving signals comprising alternating known and unknown symbol portions, and a demodulator connected thereto. The demodulator may include a channel estimation module for generating respective channel estimates for a prior unknown symbol portion(s), current unknown symbol portion and for future unknown symbol portion(s). An autocorrelation module may generate autocorrelation matrices for the prior, current and future unknown symbol portions. A channel match filter module may generate respective channel matching coefficients for the prior and current/future unknown symbol portions, and a factorization module may divide the autocorrelation matrices into respective upper and lower autocorrelation matrices. A transformation module may transform the channel matching coefficients into upper and lower channel matching coefficients. A a back-substitution module may determine the current unknown symbol portion based upon the upper and lower autocorrelation matrices and channel matching coefficients for the current and prior/future unknown symbol portions.
REFERENCES:
patent: 5706314 (1998-01-01), Davis et al.
patent: 6393073 (2002-05-01), Eilts
patent: 6707864 (2004-03-01), Kim
patent: 6763064 (2004-07-01), Graf et al.
patent: 2004/0076248 (2004-04-01), Purho
patent: 2005/0152295 (2005-07-01), Reznik
Hwang et al.,A Novel Block Equalization Design for Wireless Communication with ISI and Rayleigh Fading Channels, presented at ASIA-Pacific Conference on ASICs, Aug. 6-8, 2002.
Kung,Why Systolic Architectures?, The Institute of Electrical and Electronics Engineers, Inc., 1982.
Nieto John Wesley
Wadsworth Michael Andrew
Allen Dyer Doppelt Milbrath & Gilchrist
Fan Chieh M.
Harris Corporation
Puente Eva
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