Method and system for selecting a pre-coding matrix
AssigneeHuawei Technologies Co., Ltd.
InventorsNan ZHAO, Zhenxing Gao, Changguo Jiang, Huabin Liu
Life of this patent
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Abstract
A method for selecting a pre-coding matrix, and a device and a telecommunication system for implementing the method are provided. The method includes calculating a effective signal noise ratio (SNR) at each layer for each pre-coding matrix, comparing the lowest SNR at each layer for each pre-coding matrix against the threshold SNR, selecting a proper pre-coding matrix, and considering high and low SNRs of a system during selection of a pre-coding matrix to achieve good pre-coding effects and improve the system performance.
Claims17
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 the 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 effective SNRs with the threshold SNR, and selecting a pre-coding matrix.
A device for selecting a pre-coding matrix, comprising:
- a calculating module, configured to calculate an effective signal noise ratio (SNR) at each layer for each pre-coding matrix;
- a comparing module, configured to obtain a minimum effective SNR from the effective SNRs at all layers for the pre-coding matrix;
- and
- a selecting module, configured to:
- receive the minimum effective SNRs of multiple pre-coding matrixes, compare the effective SNRs with the SNR threshold, and select a pre-coding matrix.
A transmitter of a Multiple Input Multiple Output (MIMO) telecommunication system, coupling with a receiver of the MIMO telecommunication system, wherein,
- the transmitter is configured to calculate an effective signal noise ratio (SNR) at each layer for each pre-coding matrix;
- obtain a minimum effective SNR from the effective SNRs at all layers for the pre-coding matrix;
- obtain the minimum effective SNRs of multiple pre-coding matrixes, compare the effective SNRs with the SNR threshold, and select a pre-coding matrix;
- send the index of the pre-coding matrix in the codebook to a receiver;
- pre-code the signals to be sent by using the selected pre-coding matrix, and send the signals to the receive.
A receiver of a Multiple Input Multiple Output (MIMO) telecommunication system, coupling with a transmitter of the MIMO telecommunication system, wherein,
- the receiver is configured to calculate an effective signal noise ratio (SNR) at each layer for each pre-coding matrix, obtain a minimum effective SNR from the effective SNRs at all layers for the pre-coding matrix, obtain the minimum effective SNRs of multiple pre-coding matrixes, compare the effective SNRs with the SNR threshold, and select a pre-coding matrix, send the index of the pre-coding matrix in the codebook to the transmitter, pre-code the signals to be sent by using the selected pre-coding matrix, and send the signals to the transmitter.
Dependencies are inferred from the claim text.