Patent ID: 9143211
Filing Date: 2015-09-22
Classification: H04B,H04L,H04W

Abstract:
1. A method for transmitting signals in a wireless communication system, the method comprising: identifying a number of streams to be transmitted; identifying a precoding algorithm based on whether a single stream or multiple streams are to be transmitted; initializing the precoding algorithm to a complex matrix, the precoding algorithm for precoding signals transmitted by a plurality of antennas; iteratively processing the precoding algorithm on a per-antenna basis by, at each iteration, sequentially updating a precoder for each of the plurality of antennas; after each iteration, determining whether the precoding algorithm has converged based on a change in a rate of mutual information across iterations; and in response to determining that the precoding algorithm converged, transmitting the signals using the precoding algorithm, wherein sequentially updating the precoder comprises: where ψ(w) represents a phase of a complex variable w, where ƒ where ψ(w) represents a phase of a complex variable w, g