Diversity communication system with arrays of antennas using adaptive mezched filters and decision feedback equalizers

Claim 1

A diversity communication system comprising: a plurality of arrays of antennas; a plurality of groups of receive units, said groups corresponding respectively to said antenna arrays, the receive units of each group respectively processing incoming signals from the antennas of the corresponding array; a plurality of diversity branches connected respectively to the arrays of antennas, each of the diversity branches comprising: a plurality of complex multipliers for respectively multiplying the processed incoming signals by weight coefficients; a plurality of correlators for determining correlations between the processed incoming signals and a decision signal and deriving therefrom the weight coefficients of the complex multipliers; a plurality of delay means for providing delays to the processed incoming signals respectively so that each of the delayed signals and said decision signal are time-coincident with each other at inputs of each of said complex multipliers; an adder for combining output signals of the complex multipliers to produce a sum signal; and an adaptive matched filter for converging delay-dispersed components of the sum signal and maximal-ratio combining said components according to said decision signal to produce an output signal of the diversity branch; a diversity combiner for combining the output signals of the diversity branches to produce a diversity-combined signal; and a decision feedback equalizer for adaptively equalizing the diversity-combined signal and producing therefrom the decision signal for the correlators and the adaptive matched filter of each of said diversity branches.

Claim 5

A method for controlling each of a plurality of diversity branches in a diversity communication system comprising a plurality of arrays of antennas, and a plurality of groups of receive units, said groups corresponding respectively to said antenna arrays, the receive units of each group respectively processing incoming signals from the antennas of the corresponding array, said plurality of diversity branches corresponding to the groups of said receive units, a diversity combiner for combining the output signals of the diversity branches to produce a diversity-combined signal, and a decision feedback equalizerfor adaptively equalizing the diversity-combined signal and producing therefrom a decision signal, said method comprising the steps of: a) providing delays to the incoming signals processed by the receive units of the corresponding group; b) determining correlations between the delayed incoming signals and said decision signal and deriving therefrom weight coefficients; c) respectively multiplying the delayed incoming signals by said weight coefficients; d) combining the multiplied incoming signals to produce a sum signal; and e) converging delay-dispersed components of the sum signal and maximal-ratio combining said components according to said decision signal to produce the output signal of the diversity branch.

Claim 6

A method for controlling each of a plurality of diversity branches in a diversity communication system comprising a plurality of arrays of antennas, and a plurality of groups of receive units, said groups corresponding respectively to said antenna arrays, the receive units of each group respectively processing incoming signals from the antennas of the corresponding array, said plurality of diversity branches corresponding to the groups of said receive units, a diversity combiner for combining the output signals of the diversity branches to produce a diversity-combined signal, and a decision feedback equalizerfor adaptively equalizing the diversity-combined signal and producing therefrom a decision signal, said method comprising the steps of: a) providing delays to the incoming signals processed by the receive units of the corresponding group; b) determining correlations between the delayed incoming signals and said decision signal and deriving therefrom weight coefficients; c) respectively multiplying the delayed incoming signals by said weight coefficients; d) combining the multiplied incoming signals to produce a sum signal; and e) converging delay-dispersed components of the sum signal and maximal-ratio combining said components according to said decision signal to produce the output signal of the diversity branch.