An Analog Beam Vector Optimization Method in Separate Digital-Analog Mixed Transceiver Communication System

Abstract

The invention discloses an analog beam vector optimization method in a separated type digital-analog hybrid transceiving communication system. In the separated type digital-analog hybrid transceiving communication system, an iterative algorithm for optimizing analog beam vectors is proposed by using an interference alignment thought; according to the iterative algorithm, the beam vector of each sub-array at a receiver and the beam vector of each sub-array at a sender are optimized alternately according to the reciprocity characteristic of a channel until the interference change of each sub-array is less than a given threshold value. The iterative algorithm is advantaged by rapid convergence rate, low calculation quantity and low complexity; interference alignment among the sub-arrays can be realized; the interferences among the sub-arrays can be reduced through the interference alignment; further the spectrum efficiency of the system is increased; and the system performance is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to an analog beam vector optimization method in a millimeter wave (Millimeter wave) multiple input multiple output (Multiple Input Multiple Output, MIMO) separated digital-analog hybrid transceiver communication system. Background technique [0002] With the continuous development of communication technology, the access volume of wireless communication equipment and the user's demand for data rate are also increasing. The combination of millimeter wave with high frequency band and MIMO system can realize the improvement of transmission rate and spectrum efficiency. The millimeter-wave MIMO communication system has attracted the attention of people all over the world, setting off a new round of technological competition in the global mobile communication field. In order to achieve the rapid development of the mobile Internet and the improvement of business support capabi...

AI Technical Summary

Problems solved by technology

In traditional MIMO communication systems, digital beamforming technology is used in the baseband. However, one antenna is connected to one radio frequency (RF) link. As the number of antennas increases, the required cost also increases.

Using cheap phase shifters to form analog beamforming in the analog domain can greatly reduce the cost, but because of the limitations of the phase shifter itself, the performance is affected to a certain extent, so how to better design analog beamforming has greater value

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