Patent ID: 7113558
Filing Date: 2006-09-26
Classification: H04B

Abstract:
1. A receiver for use in a MIMO system, comprising: N receive antennas; N radio frequency (RF) converters, each RF converter downconverting a signal it receives from a respective associated antenna to an analog baseband signal and converting said analog baseband signal to a digital representation; an estimator, responsive to said digital representations, for determining an estimate of the average signal-to-interference-and-noise ratio (SINR) for a forward channel being received by said receiver; an estimator for determining an estimate of a correlation among the channel components for a forward channel being received by said receiver; and a weight calculator for calculating at least one weight for use by a transmitter of said forward channel to transmit data substreams to said receiver as a function of said estimates of SINR end correlation among the channel components, said at least one weight being determined in said weight calculator by solving at least one equation of the set consisting of where α P ρ is an estimate of the average signal-to-interference-and-noise ratio (SINR), and η is the correlation among the channel components, M is the number of transmit antennas, and N is the number of receiver antennas.