Patent ID: 7813440
Filing Date: 2010-10-12
Classification: H04B,H04L

Abstract:
1. A receiver having L (L is an integer equal to or greater than 2) antennas for an MIMO communication system comprising: a channel state estimating means for estimating a state of each communication channel from received signals received by the L antennas to output information of channel state; a feedback signal generating means for generating feedback information according to the information of channel state; a feedback-delay compensating means for processing the feedback information in order to compensate feedback-delay of a feedback path; a proper reception weight generating means for generating proper reception weights by using the information of channel state and processed feedback information from the feedback-delay compensating means; a reception weight multiplier for multiplying the received L substreams of respective K signal streams (K is an integer equal to or less than smaller one of N or L) , N being a number of antennas at a transmitter that transmits signals to the receiver and N is an integer equal to or greater than 2 by the proper L reception weights, respectively; a demodulator for composing the L weighted substreams to obtain respective composed K signal streams and demodulating the composed K signal streams, respectively; a signal combining unit for combining the demodulated K signal streams from the demodulator to reproduce an original transmission signal; and a received power estimation unit for estimating a condition of received power by using the information of channel estimation from the channel state estimating means, received signals received by L antennas and information of a known symbol, wherein the channel state estimating means the feedback signal generating means comprises: the feedback-delay compensating means comprises: the proper reception weight generating means comprises: