Mixed precision phase shifting network with variable number of phase shifters and precoding method

Abstract

The invention discloses a mixed-precision phase-shifting network and a precoding method with a variable number of phase shifters, relates to a precoding structure and method in a multiple-input multiple-output MIMO communication system, and belongs to the field of wireless communication. A mixed-precision phase-shifting network with a variable number of phase shifters is a precoding structure, including radio frequency RF links, accumulators, antennas, connecting lines, and a phase-shifting network consisting of switches, high- and low-precision phase shifter pairs, and connecting lines Network; use a pair of high-precision and low-precision phase shifters instead of a traditional fixed-precision phase shifter, and control the enabling state and working accuracy of the high- and low-precision phase shifters by controlling the enabling state of the switch, so as to flexibly The number and precision of phase shifters can be configured accordingly. The hybrid precoding method applicable to a mixed-precision phase-shifting network with a variable number of phase shifters, by jointly optimizing the enable state, working accuracy and hybrid precoding matrix of the phase shifters, reduces energy costs while ensuring quasi-optimal Excellent spectral efficiency, thereby improving system energy efficiency.

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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