METHOD AND TRANSMITTER FOR IMPROVING THE PERFORMANCE OF TRANSMIT DIVERSITY IN WIRELESS SYSTEM

摘要

The invention is related to a method for improving the performance of transmit diversity in a wireless communication system. The method comprises the steps of generating at least one phase shift angle sequence and applying phase shift to one of said a number of transmitter antennas according to said at least one phase shift angle sequence. The invention is also related to a transmitter for use in a wireless communication system, the transmitter comprises phase sequence generator which is used to create a sequence of phase shift angles and sends phase shift angles periodically to a multiplier, and a multiplier which is used to multiply one Alamouti encoded data substream with current phase shift angle received from said phase sequence generator.