Patent ID: 7433392

Claim:
A wireless communications device comprising: a wireless receiver for receiving wireless signals comprising alternating known and unknown symbol portions; and a demodulator connected to said wireless receiver and comprising a channel estimation module for generating respective channel estimates for at least one prior unknown symbol portion and a current unknown symbol portion based upon adjacent known symbol portions, an autocorrelation module for generating autocorrelation matrices for the at least one prior and current unknown symbol portions based upon respective channel estimates, a channel match filter module for generating respective channel matching coefficients for the current unknown symbol portion, a factorization module for dividing the autocorrelation matrices into respective upper and lower autocorrelation matrices, a transformation module for transforming the channel matching coefficients into upper and lower channel matching coefficients, and a back-substitution module for determining the current unknown symbol portion based upon the upper and lower autocorrelation matrices for the current and at least one prior unknown symbol portions, and the upper and lower channel matching coefficients for the current unknown symbol portion.