Fast ambiguous DOA elimination method of DOA measurement for hybrid massive MIMO receiver

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 (HAD) structure was proposed. In this paper, fast ambiguous phase elimination method is proposed solve problem direction-finding ambiguity caused by HAD MIMO. Only two-data-blocks are used realize Simulation results show that greatly reduce delay with slight performance loss.