Method for selecting full-duplex antenna in multiple-in multiple-out (MIMO) system

Abstract

The invention provides a method for selecting a full-duplex antenna in a multiple-in multiple-out (MIMO) system. The method comprises the following steps of: 1, performing self-interference elimination on receiving antennae at two communication ports in a full-duplex antenna system to acquire corresponding self-interference channels; 2, performing equalization processing on signals received by the receiving antennae at the two communication ports to acquire postprocessing signals of corresponding transmitting antennae; 3, when distribution of the self-interference channels corresponding to the receiving antennae at the two communication ports accords with independent identically distributed Rice distribution, calculating the postprocessing signal to interference and noise ratio of the receiving antennae at the two communication ports; and 4, traversing all antenna pairs between the two communication ports based on antenna selection criteria to determine a final antenna matching scheme. The advantages of a full-duplex antenna technology and an MIMO technology are combined, a scheme with gain is selected from all possible antenna matching schemes, channel capacity is improved, and the whole performance of the system is improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method for selecting a full-duplex antenna in a MIMO system. Background technique [0002] Traditional wireless communication systems use frequency division or time division methods to achieve two-way communication, which requires time or frequency resources to be divided into orthogonal areas; although in terms of communication effects, the current technology can already allow data to be transmitted bidirectionally, but Because it uses the method of frequency division or time division, its essence is still a half-duplex wireless communication system. If a full-duplex communication system is used to realize two-way transmission of information at the same frequency at the same time, the biggest difficulty is that, for useful signals, a large amount of quantization noise will be generated during quantization, making communication extremely difficult. Through continuous rese...

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Problems solved by technology

[0004] As a new technology, the current research on full-duplex antennas is limited to single-send and single-receive systems. However, the launch of the fourth-generation mobile communication has shown that MIMO systems have become more and more mainstream technologies. Combining full-duplex antennas with MIMO systems Combined, the channel utilization can be further improved, but in the MIMO system, based on the uncertainty of the full-duplex antenna pairing, how to select the antenna collocation with a gain scheme, there is no feasible method in the prior art

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