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Detection method for multiple input multiple output system channel capacity

A detection method and channel capacity technology, applied in the transmission system, diversity/multi-antenna system, scattering propagation system, etc., can solve the problem of channel capacity impact without giving corresponding analysis, etc.

Inactive Publication Date: 2004-12-15
XI AN JIAOTONG UNIV
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Problems solved by technology

However, no corresponding analysis is given for the impact of scattering environment parameters on channel capacity

Method used

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  • Detection method for multiple input multiple output system channel capacity
  • Detection method for multiple input multiple output system channel capacity
  • Detection method for multiple input multiple output system channel capacity

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Embodiment Construction

[0073] The whole analysis process is described in detail below.

[0074] 1) Establishment of channel model for multiple-input multiple-output system

[0075] First construct the uplink of the 3×3 MIMO system. Assuming that the transmitted signals at the mobile station are independent of each other, after space propagation, there is a certain correlation between the signals at the receiving antenna due to fading. The receiving antenna adopts UCA antenna array, and the radius is r.

[0076] The received signal vector is

[0077] y(t)=H(t)*x(t)+n(t)

[0078] In the formula, H(t) is the channel impulse response matrix; x(t) is the transmitted signal vector; y(t) is the received signal vector; n(t) is the additive white Gaussian noise (AWGN); * represents the convolution operation . Considering only the narrowband MIMO system, the above formula can be simplified as

[0079] y=Hx+n (1) In the formula, x=[x 1 , x 2 , x 3 ] H is a 3-dimensional transmit signal vector; y=[y ...

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Abstract

A method for detecting capacity of multiple input and output channels is mainly for analyzing the influence of fade correlation and channel physical parameter to the said channel capacity by resolving the channel matrix into the product of the channel fade correlation matrix and matrix U which element is the variable of N(0,1) obeying to the same independent distribution and re-setting up the math, model of the fade correlation. The method analyses the scattered angle under fade correlation and influence of the antenna gap to the channel capacity and utilizes the circulation matrix theory to analyze and derive the closed expression of MXN multiple input and out system channel capacity.

Description

technical field [0001] The invention relates to a method for detecting channel capacity of a multiple-input multiple-output system. The method is mainly for detecting the influence of fading correlation and channel physical parameters on the channel capacity of the multiple-input multiple-output system. Background technique [0002] MIMO technology will be one of the main ways to improve spectrum efficiency in future mobile communication systems. Traditional wireless communication theory regards multipath propagation as interference that causes signal fading, while MIMO systems use multiple antenna arrays at the transmitter and receiver to transmit and receive information, making full use of space resources to improve system performance and increase system capacity. The use of multiple-input multiple-output technology is like establishing multiple independent parallel sub-channels in the original frequency band. At the receiving end, the spatial characteristics of the signal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/22H04B17/309
Inventor 王君朱世华王磊
Owner XI AN JIAOTONG UNIV
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