Decoding method of MIMO space multiplexing and device thereof

Abstract

The invention discloses a decoding method of MIMO space multiplexing and a device thereof. The decoding method comprises the following steps: acquiring the MT*MR dimensional weighting matrix W required for regaining each layer of transmitting signals of a transmitting end, wherein W=(HHH+D2)-1HH, D is a diagonal matrix, the diagonal element value is the reciprocal of the signal-to-noise ratio of transmitting antennas at the transmitting end, H represents a channel matrix, MT represents the number of the transmitting antennas, and MR represents the number of receiving antennas at the receiving end. The decoding method comprises the following steps: calculating the weighting matrix W by utilizing the Greville algorithm according to the channel matrix H and the diagonal matrix D; obtaining the initial estimation value of each layer of transmitting signals according to the calculated weighting matrix W; and extracting each layer of transmitting signals at the transmitting end according to the initial estimation value, the channel matrix, the diagonal matrix and the MR dimensional receiving signals received by the receiving end. In the invention, the Greville algorithm is adopted to calculate the weighting matrix, the required MAC operand is less than that of the QR decomposition algorithm and the Cholesky decomposition algorithm, and the calculation complexity is very low.

Description

technical field [0001] The present invention relates to the field of MIMO technology, in particular to a MIMO spatial multiplexing decoding method and a MIMO spatial multiplexing decoding device. Background technique [0002] MIMO (Multiple-Input Multiple-Out-put) refers to a communication system that uses multiple transmitting antennas at the transmitting end and multiple receiving antennas at the receiving end, such as figure 1 As shown, the transmitting end includes a transmitting signal processing module and a plurality of transmitting antennas S connected to the transmitting signal processing module 1 , S 2 ......S MT , including a receiving signal processing module and a plurality of receiving antennas y connected to the receiving signal processing module at the receiving end 1 、y 2 ......y MR . The transmitted signal after modulation processing at the transmitting end After being processed by the transmitting signal processing module, it passes through the tra...

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Problems solved by technology

[0007] In the calculation of the pseudo-inverse of the weighted matrix W, one of the methods of the QR decomposition algorithm and the Cholesky decomposition algorithm can be used for calculation, but the computational complexity is relatively high; in addition, the matrix pseudo-inverse calculation of the weighted matrix W can also be directly performed , but the computational complexity is higher

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