Patent ID: 7885364
Filing Date: 2011-02-08
Classification: H04B,H04L

Abstract:
1. A wireless communication system comprising a receiver, which has N reception antennae (where N is an integer not smaller than 2) and receives and demodulates transmission signals from a transmitter having M transmission antennae (where M is an integer not smaller than 2), wherein the receiver comprises: K adaptive nulling means of first to K-th adaptive nulling means (where K is not smaller than 2 and not greater than M) connected to the N reception antennae; and an adaptive demodulation means connected to the K-th adaptive nulling means, wherein the K adaptive nulling means includes k-th adaptive nulling means (where k is an integer not smaller than 1 and not greater than K) configured to orthogonalize received signals received by the reception antennae, with use of a matrix having, as its elements, channel coefficients between the reception antennae and the transmission antennae, to generate and output Lk nulling signals (where Lk is an integer not smaller than 1 and smaller than M and k denotes the k-th adaptive nulling means and is not smaller than 1 and not greater than K), and the adaptive demodulation means demodulates the received signals with use of the nulling signals, and outputs the received signals demodulated, and wherein the k-th adaptive nulling means comprises: an adaptive control means which rearranges a channel matrix, in correspondence with quality of the transmission signals transmitted from the M transmission antennae; and a nulling means which generates the nulling signals from the received signals received by the N reception antennae, with use of the channel matrix and outputs the nulling signals.