Patent ID: 6650716
Filing Date: 2003-11-18
Classification: H04B,H04L

Abstract:
A diversity hybrid receiver in a digital communication system, the receiver including:a joint optimization processor including instructions for producing a plurality of optimal filter coefficients and a plurality of optimal effective channel coefficients hopt from a plurality of sequences of received training signal samples and a sequence of known training symbols; a space-time filter including means for producing an intermediate sequence of signal samples y from a plurality of received sequences of signal samples and the optimal filter coefficients; and an equalization processor including instructions for producing an estimated sequence of symbols &scirc;, the instructions comprising: instructions for forming a matrix of optimal effective channel coefficients H from the optimal effective channel coefficients hopt; instructions for determining a lower triangular matrix L from a relationship LLH=HHReeâˆ’1H+I where LH is the Hermitian of L, HH is the Hermitian of H, I is an identity matrix, and Ree is a covariance matrix of a disturbance e; instructions for calculating a vector z=Lâˆ’1HHReeâˆ’1y; and instructions for determining an estimated sequence of symbols &scirc; belonging to a set of discrete possible symbol values such that the square of the magnitude of a difference vector LH&scirc;âˆ’z is minimized.