Patent ID: 7672410

Claim:
A diversity receiver having N branches for receiving M versions of an input signal, the diversity receiver comprising: a demodulator for receiving the M versions of the input signal, and generating M demodulated signals in accordance with a set of channel frequency response estimates after demodulation; N channel state information estimators, equipped for the N branches respectively, for individually fetching signals from the demodulator and producing channel parameters each related to one of the M versions of the input signal; and a combining and demapping device for generating a pre-correction signal after respectively receiving the M demodulated signals to perform signal combining and symbol demapping in accordance with the channel parameters respectively related to each said version of the input signal; wherein N, M are integers, and N≧2, M≧2; wherein the combining and demapping device comprises: a diversity combining unit for receiving the M demodulated signals, respectively multiplying by the channel parameters as weighting factors to produce M sets of multiplied signals, and then performing signal combining or selecting operations to generate a combined signal based on channel conditions of the N branches; and a soft bit demapper for receiving the combined signal, performing symbol demapping and generating the pre-correction signal.