Fast Ambiguous DOA Elimination Method of DOA Measurement for Hybrid Massive MIMO Receiver

TL;DR

This paper introduces a fast method for resolving direction-finding ambiguities in hybrid MIMO systems, significantly reducing estimation delay while maintaining acceptable accuracy.

Contribution

A novel ambiguous phase elimination technique tailored for hybrid MIMO systems that requires only two data blocks for DOA estimation.

Findings

Reduces estimation delay significantly

Maintains high-resolution DOA estimation

Requires only two data blocks for operation

Abstract

DOA estimation for massive multiple-input multiple-output (MIMO) system can provide ultra-high-resolution angle estimation. However, due to the high computational complexity and cost of all digital MIMO systems, a hybrid analog digital (HAD) structure MIMO was proposed. In this paper, a fast ambiguous phase elimination method is proposed to solve the problem of direction-finding ambiguity caused by the HAD MIMO. Only two-data-blocks are used to realize DOA estimation. Simulation results show that the proposed method can greatly reduce the estimation delay with a slight performance loss.