Hybrid RZF Precoding Algorithm for Massive MIMO System

doi:10.16182/j.issn1004731x.joss.201712024

Abstract

Abstract: In view of the high system complexity and high cost of the multi-user Massive MIMO system based on the traditional full digital precoding, a hybrid analog and digital RZF precoding is proposed. Based on the consideration of the channel noise, the inter-user interference and the system structure, the analog precoding matrix is sectionally designed with the combination of MRT precoding and RZF precoding, and for the digital part, a low dimension RZF precoding is used on the basis of the optimized channel matrix. After the optimization design, both the number of RF chain and the dimension of the digital baseband processing are reduced. According to the simulation results, based on the reduction of system complexity and implementation cost, the spectrum efficiency of the proposed hybrid RZF precoding algorithm is very close to that of the traditional full digital RZF precoding.

Key words: massive MIMO, hybrid precoding, RZF precoding, RF chain, spectrum efficiency

CLC Number:

TN929.5

Xie Bin, Xie Shumin, Liu Shurui. Hybrid RZF Precoding Algorithm for Massive MIMO System[J]. Journal of System Simulation, 2017, 29(12): 3114-3122.

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