Patent ID: 9614599
Date: 2017-04-04
CPC Classifications: H04B

Claim:
1. A method for determining precoding matrixes for a communication of a first base station and a second base station with a first mobile station and a second mobile station, the communication comprising: a first signal channel between the first base station and the first mobile station, a second signal channel between the first base station and the second mobile station, a third signal channel between the second base station and the first mobile station, and a fourth signal channel between the second base station and the second mobile station, the method comprising: determining a first sub-set of a set of precoding matrixes based on a predetermined consideration of a signal to noise ratio (SNR) between the first and second base stations and the first and second mobile stations, the set of precoding matrixes comprising a first precoding matrix for the first signal channel, a second precoding matrix for the second signal channel, a third precoding matrix for the third signal channel and a fourth precoding matrix for the fourth signal channel; and generating a second sub-set of the set of precoding matrixes based on the first sub-set of the set of precoding matrixes determined such that the first and second sub-sets satisfy a predetermined condition for interference alignment at the first and second mobile stations, wherein the predetermined consideration of SNR comprises a consideration of a first SNR at the first mobile station and a second SNR at the second mobile station in determining the first sub-set for optimizing the first sub-set with respect the first SNR at the first mobile station and the second SNR at the second mobile station.