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Selection preprocess method for downlink link antenna of multi-user MIMO system

A downlink and antenna selection technology, applied in diversity/multi-antenna systems, transmission systems, synchronization/start-stop systems, etc., can solve problems such as poor system performance and no consideration of the impact of receiving signal-to-noise ratio demodulation, etc., to achieve Improve performance, improve performance, realize the effect of multi-user transmission

Inactive Publication Date: 2010-06-09
HARBIN ENG UNIV
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Problems solved by technology

However, the disadvantage of this method is that it only considers how to remove the co-channel interference between users, and does not consider the influence of the received signal-to-noise ratio on demodulation, resulting in poor system performance

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  • Selection preprocess method for downlink link antenna of multi-user MIMO system
  • Selection preprocess method for downlink link antenna of multi-user MIMO system
  • Selection preprocess method for downlink link antenna of multi-user MIMO system

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0026] combine figure 1 , the working principle of the traditional multi-user MIMO system downlink is: 101 is the channel information source unit, and the obtained channel information between the base station and each user is formed into the form of a channel transmission matrix; 102 is the calculation of the preprocessing matrix basis 103 is the generation unit of any unitary matrix; 104 is the data source unit; 105 is the space-time coding unit, the output of module 104 is the space-time positive 106 is a transmitting antenna array unit; 107 is a receiving antenna array unit; 108 is a single-user detection unit. H (1) , H (2) , …, H (K) is the output signal of cell 101, V (1) , V (2) ,…,V (K) is the output signal of unit 102.

[0027] combine Figure 4 , the working principle of the multi-user MIMO system downlink of the present inve...

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Abstract

An antenna-selection preprocessing method of multi-user MIMO system down link includes setting up model of multi-user MIMO system down link to confirm coding mode and channel transmission matrix, confirming base of preprocessing matrix of each user by channel transmission matrix between base station and each user, utilizing said channel transmission matrix and said base to confirm optimum unitarymatrix of each user preprocessing matrix, converting said model to be equivalent vector form and using linear zero-approach means to realize signal detection.

Description

(1) Technical field [0001] The invention belongs to the technical field of wireless communication, and particularly relates to a downlink antenna selection preprocessing method. (2) Background technology [0002] The MIMO (Multiple Input Multiple Output) system is very simple in concept. Any wireless communication system constitutes a MIMO system as long as multiple antennas or antenna arrays are used at both ends of the wireless link. In the multipath environment, the MIMO system can double the capacity of the communication system without increasing the bandwidth, and can overcome the channel fading problem through the space-time coding method. [0003] However, for multi-user MIMO systems, in addition to overcoming the problem of channel fading, the more important problem to be solved is the co-channel interference (CCI, Co-Channel Interference) problem between users. If the co-channel interference between users is not removed, It will have a great impact on the detection...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04B1/707H04L1/06H04L25/49
Inventor 张林波刘彤田园张曙田野赵旦峰
Owner HARBIN ENG UNIV