Patent ID: 7103326
Filing Date: 2006-09-05
Classification: H04B,H04L

Abstract:
1. A method for increasing transmit diversity gain in a wireless communication system including a transmitter with a plurality of antennas and a receiver with one antenna, comprising: measuring a phase of each of a plurality of signals received by the antenna in the receiver; selecting one of the plurality of signals as a reference signal; determining, independently for each other signal with respect to the reference signal, feedback information indicating a required rotation of each other signal so that a phase of each other signal is within an identical quadrant as the phase of the reference signal; sending the feedback information for each other signal to the transmitter, in which the transmitter has two antennas, and the feedback information is one bit, and in which a space encoding vector is p phase rotating, in the transmitter, each other signal according to the corresponding feedback information to produce a rotated signal; and transmitting the reference signal and each rotated signal to the receiver.