Zte Corporation

Xi'an Zhongxing New Software Co., Ltd.

Gaocai Xiong

Hongfeng Qin

Hongzhi Zhao

Yue Xiao

Dengsheng Lin

A method and device for detecting a signal of an LTE uplink system in an interference condition. The method comprises: receiving baseband signals of M receiving antennas, and after fast Fourier transform, conducting demapping to obtain frequency-domain baseband signals; extracting a DMRS inserted in a received signal of each antenna, and then, calculating a channel gain hof each receiving antenna; combining the baseband signals and the channel gains of the M receiving antennas to obtain a signal matrix Yand a gain matrix H; calculating an interference noise covariance matrix Ron each subcarrier; conducting interference pre-processing on a received signal on each combined subcarrier to obtain the received signal (1) and the channel gain (2) after the interference pre-processing, where D=R; and according to (3), conducting frequency-domain balancing on the received signal after the interference pre-processing.

Method and device for detecting signal of LTE uplink system in interference condition

Disclosed are a method and device for estimating a channel in a multiple-receiving antenna system. The method comprises: a channel estimation is performed on a received pilot signal by using a least square channel estimation algorithm to obtain an estimation value H; an N'-dimensional channel autocorrelation matrix formula (I) and a channel frequency domain autocorrelation matrix Rfrom a transmitting antenna i to any receiving antenna are acquired, and a weight matrix W which is descrambled and denoised is calculated, wherein i=1, 2, . . . , N, and Nis the number of antennae at a transmitting end; the estimation value His corrected by using the weight matrix W to obtain a corrected estimation value H. The method and device of the disclosure may obtain the performance as close as possible to the LMMSE technology through less prior statistic information, and have a simple implementation manner.

Method and device for estimating channel in multiple-receiving antenna system

Provided is a processing method and apparatus for performing space-time decoding on MIMO signals. The method includes: performing QR decomposition on a channel matrix H with a size of N&#xd7;Nin a MIMO system and performing an initialization operation, wherein Nis the number of transmitting antennas and Nis the number of receiving antennas; enumerating candidate constellation points of transmitting signals at each level of transmitting antennas according to an input parameter M=[M, M, . . . , M], a receiving signal y and a result of QR decomposition of H, wherein M is the number of the numerated candidate constellation points at each level, y=Hs+n; calculating increments of a Euclid distance due to addition of selection of a candidate constellation point at present level according to obtained candidate constellation points; and deciding and outputting space-time decoding according to the sum of calculated increments of Euclid distances of candidate constellation points at all levels.

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Shenzhen, China

Gaocai Xiong