Patent ID: 8270519

Claim:
A method for selecting a pre-coding matrix in a Multiple Input Multiple Output telecommunication system, comprising: calculating a plurality of effective signal noise ratios (SNRs) for a pre-coding matrix, each effective SNR corresponding to a layer of the system; obtaining a minimum effective SNR from the plurality of effective SNRs at all layers for the pre-coding matrix; and obtaining a plurality of minimum effective SNRs of multiple pre-coding matrixes, comparing the minimum effective SNRs with a threshold SNR, and selecting a pre-coding matrix; wherein comparing the minimum effective SNRs with the threshold SNR and selecting the pre-coding matrix comprises: selecting the pre-coding matrix with the lowest minimum effective SNR among the minimum effective SNRs, if all minimum effective SNRs are lower than the threshold SNR; or selecting the pre-coding matrix with the highest minimum effective SNR among the minimum effective SNRs, if at least one minimum effective SNR among the minimum effective SNRs is higher than the threshold SNR.