Method for selecting transmitting antenna in space multiplexing multi-input and multi-output system

Abstract

The invention discloses one space multiple input and output system emission antenna selection method, which comprises the following steps: demodulating the received guide frequency information and estimating its error and comparing the error and preset limit to estimate current signal status; according to the front signal channel to determine antenna not satisfying needs and mapping the information to the guide frequency information and feeding back the selection information according to the signal channel status signals; according to the feedback selection information to fulfill the emission signal map and optimization emission.

Description

technical field [0001] The invention relates to a method for selecting a transmitting antenna, in particular to a method for selecting a transmitting antenna in a space multiplexing multiple-input multiple-output system. Background technique [0002] Both the transmitting and receiving ends of a wireless system use multi-antenna units, use the rich spatial multi-dimensional characteristics of the wireless scattering channel, and work in the way of multiple input terminals and multiple output terminals, which can improve the channel capacity of the system in a breakthrough. The MIMO (multiple input multiple output) technology proposed based on the above ideas has opened up a new field for modern wireless communication. It provides future mobile communication systems, especially for high-speed data access services, without increasing the bandwidth. It provides a means that can greatly improve the system data rate and spectrum efficiency in the case of . [0003] The MIMO chan...

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Problems solved by technology

However, the application did not explain the basis for judging the selection of several transmitting antennas

[0012] The shortcomings of the above-mentioned existing methods are: based on the channel capacity, it is difficult to determine the total number of transmitting antennas to be selected; the antenna is selected according to the signal-to-noise ratio of the demodulated signal, without considering the improvement of the signal-to-noise ratio after removing the signal sent by one antenna, it is necessary to select The number of transmitting antennas will have a large error

Moreover, selecting antennas based on channel capacity requires multiple calculations of the determinant, and selecting antennas based on SNR estimation requires additional calculations for estimating SNR, which will increase the amount of calculations

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