Hybrid precision phase shift network with variable phase shifter number and precoding method

Abstract

The invention discloses a hybrid precision phase shift network with variable number of phase shifters and a precoding method, relates to a precoding structure and method in a multiple-input multiple-output (MIMO) communication system, and belongs to the field of wireless communication. The hybrid precision phase shift network with the variable number of phase shifters is a pre-coding structure andcomprises a radio frequency (RF) link, an accumulator, an antenna, a connecting wire and a phase shift network consisting of a switch, a high-precision phase shifter pair, a low-precision phase shifter pair and a connecting wire. A pair of high-precision phase shifters and a pair of low-precision phase shifters are used for replacing a traditional fixed-precision phase shifter, the enabling states and the working precision of the high-precision phase shifter pair and the low-precision phase shifter pair are controlled by controlling the enabling states of the switches, and therefore the number and the precision of the phase shifters are flexibly configured. According to the hybrid precoding method suitable for the hybrid precision phase shift network with the variable number of phase shifters, the enabling state, the working precision and the hybrid precoding matrix of the phase shifters are jointly optimized, so that the quasi-optimal spectral efficiency is ensured while the energy overhead is reduced, and the energy efficiency of the system is improved.

Description

technical field [0001] The invention relates to a precoding structure and method in a multiple-input multiple-output MIMO (Multi-input Multi-ouput) communication system, in particular to a hybrid precoding structure and a hybrid precoding method, and belongs to the field of wireless communication. Background technique [0002] Millimeter wave (300MHz~300GHz) MIMO communication technology is considered to be one of the key technologies of the fifth generation mobile communication system (5G) due to its abundant bandwidth resources and high spectral efficiency. At present, millimeter wave communication has not been widely commercialized due to problems such as high device cost and high energy consumption, and it is expected to continue to play an important role in the next generation of mobile communication systems. In order to achieve the goal of 6G, base stations need to deploy large-scale antenna arrays to improve spectral efficiency and coverage. At the same time, the cell...

AI Technical Summary

Problems solved by technology

However, switches and low-precision phase shifters cause severe loss of array gain

[0007] The existing digital-analog hybrid precoding matrix design method is only suitable for a single-precision phase-shifting network, and when the phase-shifting network structure is improved, there will be no corresponding hybrid precoding matrix design method

[0008] In summary, existing technologies cannot achieve sufficiently low power consumption of phase-shifting networks while maintaining high array gain

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