Method of combining signals from multiple channels in a multi-antenna receiver and its apparatus

An apparatus of combining signals from multiple channels in a multi-antenna receiver, wherein the apparatus comprises:

• a channel estimation unit for respectively performing channel estimation on signals received from N antennas and obtaining N channel estimation results, N>1;
• a channel equalization unit for respectively performing channel equalization on the signals received from N antennas based on the N channel estimation results output by the channel estimation unit;
• a noise estimate/SNR unit for obtaining N noise estimates or SNRs respectively from the N channel estimation results output by the channel estimation unit;
• a weight value calculation unit for calculating N weight values based on the N noise estimates or SNRs output by the noise estimate/SNR unit, and between(or among) the N weight values, the weight value corresponding to the signal with relatively large noise estimate or relatively low SNR is relatively small;
• a weighted combination unit for performing a weighted combination on N signals having undergone channel equalization which are output by the channel equalization unit based on the N weight values calculated by the weight value calculation unit in subsequent processing.