Method and device for acquiring precoding matrix

Abstract

A method and device for acquiring a precoding matrix are provided by the present invention. The method for acquiring a precoding matrix includes: for each receiving end, selecting the interference vectors as the interference space basis vectors from whole interference vectors, representing the remaining interference vectors as the linear combination of the interference space basis vectors, wherein the remaining interference vectors are the interference vectors in the whole interference vectors of the receiving end except the interference vectors which act as the interference space basis vectors (101); determining the currently used precoding matrix according to the linear combination of the interference space basis vectors represented by the remaining interference vectors of each receiving end and the current channel condition (102). The technical solution of the present invention can eliminate interference and do not generate Bit Error Rate (BER) floor.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is a continuation of International Patent Application No. PCT / CN2011 / 073733, filed on May 6, 2011, which claims priority to Chinese Patent Application No. 201010168681.4, filed on May 7, 2010, both of which are hereby incorporated by reference in their entireties.FIELD OF TECHNOLOGY[0002]The present invention relates to the field of communication technology, and particularly, to a method for acquiring a precoding matrix and a device therefore.BACKGROUND OF THE INVENTION[0003]The Multi Input Multi Output (MIMO) technology is a significant breakthrough of the smart antenna technology in the field of wireless mobile communication. The MIMO technology can improve the communication system capacity and the spectrum efficiency exponentially without increasing the bandwidth, and it is the key technology applied to the new generation of mobile communication system. Both the transmitting end and the receiving end of the MIMO system ...

AI Technical Summary

Benefits of technology

The present invention provides a method and device for acquiring a precoding matrix that can eliminate signal interferences and avoid a BER floor. This is achieved by representing each interference vector as a linear combination of interference space basis vectors, which allows for complete alignment and elimination of inter lives without a BER floor occurring.

Problems solved by technology

In the prior art, each transmitting end centralizes the interferences from all other transmitting ends to the signal spaces that can be processed by corresponding receiving ends based on the principles of SINR and SLNR maximization, and can not completely eliminating interferences.

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