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Signal processing method of multi-user multi-aerial communication system transmit-receive combination

A multi-user, multi-antenna, and communication system technology, which is applied in the field of multi-user, multi-antenna communication system combined signal processing for sending and receiving, and can solve problems such as limited gain

Inactive Publication Date: 2008-07-23
SHANGHAI JIAO TONG UNIV
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  • Application Information

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Problems solved by technology

However, the traditional processing is only performed at the transmitter or receiver, and the gain obtained is limited

Method used

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  • Signal processing method of multi-user multi-aerial communication system transmit-receive combination
  • Signal processing method of multi-user multi-aerial communication system transmit-receive combination
  • Signal processing method of multi-user multi-aerial communication system transmit-receive combination

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Embodiment Construction

[0022] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Consider the multi-user multi-antenna system, the number of transmitting antennas is M B , the number of users is N U , the number of antennas of the i-th user is M U i , the total number of effective user antennas is M U = Σ i = 1 N U M U i , The length of the data block transmitted for each channel is N B . The elements of the channel matrix in the frequency domain of each user are complex Gaussian random variables that are independent, identically distributed, zero-mean, and have a variance of 1, and the channels of different users are independent of each other. The noise is independen...

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Abstract

The invention relates to a method for treating received and transmitted joint signals in a multi-user multi-aerial system, a key station obtains the estimated value of present communication channel information and noise variance, the method comprises: firstly, breaking up a communication channel matrix in block diagonal, obtaining a unitary matrix with block diagonal characteristics and an expanded communication channel matrix after transformation, respectively acting each block of the unitary matrix on each corresponding user side to balance the communication channel partly, balancing the expanded communication channel matrix after the transformation on a key station end, wherein the key station end utilizes a lattice-reduction technique to obtain reduction bases with better performance, and then utilizing the reduction base to process by interference elimination to achieve the purpose for jointing a receiving end and a transmitting end to eliminate interference between multi-users and between multi-aerials. The invention increases the performance of an existing simple base on the basis of a scheme of a block diagonal decomposition method, increases diversity gain, simultaneously, keeps the increased lattice-reduction treatments with polynomial complexity still, and thereby achieves the purpose for increasing the system performance and the capacitance significantly with lower complexity.

Description

technical field [0001] The present invention relates to a multi-user multi-antenna communication system transceiving joint signal processing method, in particular to a transmitter using channel information to perform preprocessing at the transmitting end, and at the same time the receiving end also performs corresponding processing to eliminate multi-user multi-antenna method of interference. The invention belongs to the technical field of multiple antennas in a wireless communication system. Background technique [0002] In recent years, multiple antennas are used in the transmitter and receiver to form a multi-antenna communication system, which can obtain high reliability of information transmission and realize the improvement of system capacity. In a cellular communication system, there are often multiple users communicating with a base station. In the downlink, the base station transmits different data streams to each user; in the uplink, the base station receives the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/08
Inventor 何晨刘锋蒋铃鸽
Owner SHANGHAI JIAO TONG UNIV
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