Interference rejection combining method and device supporting transmit diversity

Abstract

The invention discloses an interference rejection combining method and device which support a transmit diversity. The method comprises the following steps: generating an NxN-dimensional interference and noise covariance matrix pair corresponding to a subcarrier by received signals of N (N is greater than or equal to 3) receiving antennas under the transmit diversity at a cell reference signal (CRS) resource position; performing Cholescy decomposing and upper triangular matrix inversion on the NxN-dimensional interference and noise covariance matrix to obtain an NxN-dimensional block matrix; expanding the NxN-dimensional block matrix into a 2Nx2N-dimensional noise whitening matrix; whitening the received signals and a channel estimation value according to the noise whitening matrix, and obtaining a processing result of minimum mean square error-interference rejection combining according to the received signals and the channel estimation value which are whitened. Further, the interference rejection combining device supporting the transmit diversity is disclosed.

Description

technical field [0001] The present invention relates to wireless communication technology, in particular to an interference suppression combining method and device supporting transmit diversity. Background technique [0002] In the downlink transmission of the 3GPP Enhanced Long Term Evolution (LTE-A, LTE-Advanced) system, both the Physical Downlink Control Channel (PDCCH) and the Physical Downlink Shared Channel (PDSCH) are configured with a transmit diversity transmission mode, and the system can obtain Diversity gain to improve reception performance. [0003] The main physical layer processing flow for transmit diversity in LTE-A system is as follows: figure 1 As shown, the information bits pass through the encoder to form a codeword (Codeword) and then add a mask (Scrambling), then pass through a modulation mapper (Modulation mapper) to form a transmission symbol, and then pass through a layer mapper (Layer mapper) to precoding (Precoding) ), the precoded transmission ...

AI Technical Summary

Problems solved by technology

However, when multiple input multiple output (MIMO, Multiple Input Multiple Output) transmission of more than 2 layers is supported in LTE-A, the number of recei

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