Channel relevancy estimating method based on full wave analysis in multi-input and multi-output system

Abstract

A full-wave analysis-based channel relevancy estimation method in a multi-input / multi-output system is used in the wireless communication technological field. The method includes the steps of: establishing a multi-input / multi-output broad channel module including a transmitting antenna, a receiving antenna, and a channel diffuser according to the transmitting environment of the multi-input / multi-output system; determining module parameters according to the actual environment from the angle of energy ratio; analyzing the module through the full-wave analysis method in combination with the basic theories of electromagnetic field so as to obtain the current distribution on the transmitting and receiving antennae; and defining the space relevancy coefficient of multi-input / multi / output channels according to the current distribution. Compared with the measuring and emulation results of the prior documents, the invention has the obvious effectiveness and excellence, provides a new solution to angle spectrum of irregular waves, and expands the study on the multi-input / multi-output system.

Description

technical field [0001] The invention relates to a channel estimation method in the technical field of wireless communication, in particular to a channel correlation estimation method based on full-wave analysis in a multiple-input multiple-output system. Background technique [0002] In the communication system, the multiple-input multiple-output (MIMO) wireless communication technology with multiple antennas is widely used because of its high data transmission rate and spectrum efficiency. However, in actual situations, there is correlation between different sub-channels of the MIMO system, and when the antenna spacing and incoming wave spread angle are small, the spatial correlation of the channel will have a greater impact on the performance of the MIMO system . At present, the research on the channel spatial correlation of MIMO systems is usually based on the distribution of angular power spectrum (PAS) of incoming waves, and the typical ones include uniform distributio...

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Problems solved by technology

At present, the full-wave analysis method is mainly used to solve the spatial field distribution, and then obtain the channel matrix parameters, so as to analyze the performance of the MIMO system. , and the current method is not suitable for numerical simulation of the outdoor long-distance transmission environment

[0004] After searching the existing technical literature, it was found that Li Xin and Nie Zaiping published "Evaluation of Spatial Correlation of Weak Signals in MIMO Channels" in "Acta Electronics" No. 12 in December 2004. The angular spectrum distribution deduces the explicit expression of the spatial correlation coefficient, and obtains the influence law of different channel parameters on the correlation coefficient, which provides an estimation method for the channel correlation of the MIMO system, but its shortcomings are: 1) in In the process of obtaining the correlation coefficient, it is necessary to assume the distribution form of the angular spectrum of the incoming wave

2) In the calculation process, the received signal is taken as the analysis object, and the interaction between the channel and the transceiver antenna and the spatial distribution of the signal are not considered, which makes the amount of channel information incomplete

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