Diversity communication system with adaptably oriented multiple beam patterns

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 corresponding respectively to the groups of receive units: a diversity combiner for combining output signals of the diversity branches to produce a space-domain diversity-combined signal; a decision feedback equalizer for adaptively equalizing the diversity-combined signal and producing therefrom a decision signal; and a plurality of groups of transmit units, said groups corresponding respectively to said antenna arrays, the transmit units of each group processing outgoing signals and applying the processed outgoing signals to the antennas of the corresponding array; each of the diversity branches including: a plurality of complex multipliers for respectively multiplying the processed incoming signals from the corresponding group of received units by weight coefficients; a plurality of delay means for respectively providing delays to the processed incoming signals so that the delayed signals are time-coincident with said decision signal; a plurality of correlators for determining correlations between the delayed processed incoming signals and the decision signal and deriving therefrom the weight coefficients of the complex multipliers; an adder for combining output signals of the complex multipliers to produce a sum signal; 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 a time-domain diversity-combined signal as one of the output signals of the diversity branches, and a plurality of second complex multipliers for multiplying a transmit signal by the weight coefficients derived by the correlators of the diversity branch to produce multiplied transmit signals and respectively supplying the multiplied transmit signals to said transmit units of the corresponding array as said outgoing signals.