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Method for eliminating multi-user interference in multiple input and multiple output (MIMO) system

A technology of multi-user interference and quantization method, which is applied in the field of eliminating multi-user interference in MIMO systems, and can solve problems such as high feedback, low transmission efficiency, and reduced feedback

Inactive Publication Date: 2015-03-25
HENAN POLYTECHNIC UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] Aiming at the problems of high feedback and low transmission efficiency in existing schemes, the present invention proposes a method for eliminating multi-user interference in a MIMO system, which is suitable for X-channels where two transmitting ends are respectively configured with two antennas. This method not only reduces The amount of feedback is increased, and the transmission efficiency is also improved

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  • Method for eliminating multi-user interference in multiple input and multiple output (MIMO) system
  • Method for eliminating multi-user interference in multiple input and multiple output (MIMO) system

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Embodiment Construction

[0063] An embodiment of the present invention is given below to further describe the present invention in detail. System model such as figure 2shown. The system consists of two senders and two receivers R i (i=1,2), each transmitting end is configured with two antennas, and each receiving end is configured with N antennas. h i is the sender 1 to R i channel matrix, G i is the sender 2 to R i The channel matrices of them all have an order of N×2.

[0064] Both senders use the space-time block code with a rate of 2, and the sender 1 uses the space-time coding matrix C i send to R i , i=1,2, the sender 2 will use the space-time coding matrix S i send to R i . c k (k=1,2,...,8) and s k They are the modulation signals of sending end 1 and sending end 2 respectively, and the encoding matrix C i (i=1,2) and S i respectively

[0065] C i = α 1 ...

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Abstract

The invention discloses a method of eliminating multi-user interference in a multiple input and multiple output (MIMO) system. The method of eliminating the multi-user interference in the MIMO system is suitable for an X channel, wherein two transmitting ends of the X channel are respectively provided with two antennas. The transmitting ends utilizes a pace time block code (R2-STBC), wherein the rate of the space time block code is 2, and each encoding matrix is transmitted continuously two times. The multi-user interference can be eliminated by precoding each encoding matrix at the transmitting end and conducting the add and substract operation on receiving signals at the receiving end, so that transmitting signals of each user can be decoded respectively. The method of eliminating the multi-user interference in the MIMO system can not only reduce feedback quantity, but also improve transmission efficiency.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for eliminating multi-user interference in a MIMO system. Background technique [0002] Multiple-Input Multiple-Output (MIMO, Multi-Input Multi-Output) technology refers to the use of multiple transmitting antennas and multiple receiving antennas at the sending end and receiving end, respectively, through multiple antennas to send signals and multiple antennas to receive signals, improving the Quality of service for users. [0003] The transmission scheme of MIMO technology can be divided into two categories, one is the space multiplexing scheme, which can improve the effectiveness of the system; the other is the space diversity scheme, which can improve the reliability of data transmission. One of the most studied space diversity schemes is Orthogonal Space Time Block Code (OSTBC, Orthogonal Space Time Block Code). Alamouti code is a typical OSTBC code, which contains two ind...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04H04B7/06H04B7/08H04L1/00
Inventor 田心记赵鸿图王俊峰贾利琴逯静
Owner HENAN POLYTECHNIC UNIV