Patent ID: 8295383

Claim:
A mobile communication system comprising: a plurality of mobile stations; and a base station which is simultaneously communicable with said plurality of mobile stations in an SC (Single Carrier) system, wherein said base station comprises a first receiving apparatus configured to perform SIMO (Single Input Multiple Output) communicate with a desired one of said plurality of mobile stations, said first receiving apparatus comprises: first front stage function sections configured to receive SC signals from said plurality of mobile stations and to output frequency domain signals separated respectively from the received signals from said plurality of mobile stations; a first channel estimating section configured to estimate a channel gain of each of said frequency domain signals; a first interference correlation matrix estimating section configured to estimate an interference correlation matrix based on said frequency domain signals and estimation values of said channel gains; a first back stage function section configured to output a demodulation signal based on said channel gain estimation values and said estimated interference correlation matrix; a weight calculating section configured to calculate equalization weights based on said channel gain estimation values and said estimated interference correlation matrix; and a noise estimating section configured to estimate noise power based on said pilot reception signal and said channel gain estimation values, wherein said weight calculating section selects one of said interference correlation matrix and said noise power based on a magnitude of the interference.