Patent ID: 8428162
Filing Date: 2013-04-23
Classification: H04B,H04L

Abstract:
1. A method for compensating for in-phase and quadrature (I/Q) imbalances in a multiple antenna system (MAS) with multi-user (MU) transmissions (“MU-MAS”) comprising: transmitting a training signal from each antenna of a base station to each of a plurality of wireless client devices, each of the client devices analyzing each training signal to generate channel characterization data, and receiving the channel characterization data at the base station; computing a plurality of MU-MAS precoder weights based on the channel characterization data, the plurality of MU-MAS precoder weights calculated to pre-cancel interference due to I/Q gain and phase imbalances or inter-user interference; precoding data using the plurality of MU-MAS precoder weights to generate precoded data signals for each antenna of the base station; and transmitting the precoded data signals through each of the antenna of the base station to each of the plurality of client devices.