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Precoding method and device and decoding method and device

A technology of precoding and precoding matrix, applied in the field of wireless communication, can solve the problems of unrealizable, poor performance and high bit error rate, and achieve the effect of avoiding interference between users, avoiding mutual interference and reducing bit error rate

Active Publication Date: 2011-06-22
HUAWEI TECH CO LTD
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Problems solved by technology

[0019] In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art: traditional orthogonalization solutions such as TDMA and FDMA lead to too low capacity of the system, which is only 1 / Klog(SNR)+o( log(SNR)), which limits the throughput of the system
However, the existing interference alignment methods are either only applicable to a certain special channel, and the construction of this special channel is difficult and almost impossible, or the bit error rate is high and the performance is poor

Method used

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0049]The embodiments of the present invention mainly aim to provide a novel joint iterative interference alignment method for multiple-input multiple-output (MIMO) interference channels. This technical solution can achieve a better interference alignment method through the joint design of the precoding matrix of each transmitter and the receive beamforming filter of each receiver without sharing data between transmitters, avoiding interference Mutual interference ...

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Abstract

The invention discloses a precoding method, a precoding device, a decoding method and a decoding device, relates to the technical field of wireless communication, and realizes an excellent-performance interference alignment method. The capacity of a multi-user interference system can be effectively improved, and mutual interference between users can be reduced. The precoding method comprises the following steps of: calculating a precoding matrix of each transmitting end according to the sum of mean-square errors of a data vector to be transmitted by each transmitting end; and precoding the data of each transmitting end by utilizing the precoding matrix. The invention has wide application prospect, for example, the invention can be applied to long-term evolution (LTE), LTE-Advanced CoMP technology and the like.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a precoding method and device, and a decoding method and device. Background technique [0002] In a wireless communication system, the signals of different users interfere with each other. In a Gaussian interference channel, each user knows their own complete channel information, but data cannot be shared between users, and joint transmission cannot be performed. like figure 1 As shown, it shows the Gaussian interference channel of two users, at user x 1 and x 2 There is interference between them. While eliminating the interference between users, how to increase the capacity of the Gaussian interference channel has always been one of the main bottlenecks restricting the development of technology. [0003] The traditional solution to avoid mutual interference between users in the interference channel is to adopt orthogonalization, such as time division m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L25/02H04L25/03H04B7/06
CPCH04L25/03343H04B7/0465H04B7/0413
Inventor 沈晖李斌罗毅
Owner HUAWEI TECH CO LTD
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