Multi-user, multi-input, multi-output communication method and device

A communication method and technology of a communication device, which are applied to diversity/multi-antenna systems, error prevention/detection through diversity reception, space transmit diversity, etc., can solve problems such as reducing the system bit error rate, and achieve lower error rates and better systems. The effect of capacity

Inactive Publication Date: 2006-11-29
PANASONIC CORP
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Problems solved by technology

However, since the channel gain of each user is different, a sub-channel with a low

Method used

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  • Multi-user, multi-input, multi-output communication method and device
  • Multi-user, multi-input, multi-output communication method and device
  • Multi-user, multi-input, multi-output communication method and device

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that the described embodiments are for the purpose of illustration only, and do not limit the scope of the present invention.

[0026] Firstly, the principle of this method is described, and for the sake of simplicity, the case of a single user is used as an example for description. for N T Radiating antenna and N R For a single-user MIMO system with a receiving antenna, the received signal can be expressed by the following expression (1)

[0027] y=Hx+n (1)

[0028] In the formula, y is N R ×1-dimensional receive signal vector, transmit signal vector x ∈ C N T × 1 with variance σ x 2 I, the variance of the white Gaussian noise vector n is σ n 2 I, so the signal-to-noise ratio SNR ...

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Abstract

This invention provides a multi-user and multi-antenna communication method including: at the base station, carrying out geometrical mean analysis to the channel matrix to get a back filter matrix Q, an up triangle matrix R and a pre-coding matrix P, carrying out linear pre-coding to data emitted to users from the base station by matrix P, utilizing the multiplex conjugate transposed matrix QH of Q to transform the emission signals after pre-code in linearity, utilizing the coefficients in R corresponding to the users to eliminate signal interference among users in the emitted signals to be emitted to the channels and feeding back the QH of the Q to the user ends to be used to carry out linear transformation to the received signals at the receiving end.

Description

technical field [0001] The present invention relates to a multi-antenna communication system, in particular to a multi-user multi-antenna communication method and device using dirty paper precoding and channel geometric mean decomposition. Background technique [0002] With the gradual integration of wireless network, multimedia technology and the Internet, people have higher and higher requirements for the type and quality of wireless communication services. In order to meet the requirements of wireless multimedia and high-speed data transmission, it is necessary to develop a new generation of wireless communication system. It is generally believed that in the new generation of wireless systems, multiple antenna input and output (MIMO) will become the main wireless transmission technology. [0003] The MIMO system refers to the use of multi-element antenna arrays at the sending and receiving ends, which can significantly improve system capacity and wireless transmission li...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04L1/06
Inventor 黎海涛李继峰
Owner PANASONIC CORP
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