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.
翻译:DOA对大规模多投入多重产出(MIMO)系统的估算可以提供超高分辨率角度估算,然而,由于所有数字MIMO系统的计算复杂性和成本都很高,因此提出了混合模拟数字结构(HAD)MIMO, 本文建议采用快速模糊的逐步消除方法,以解决HAD MIMO造成的方向调查模糊问题。只有两个数据区块可用于实现DOA的估算。模拟结果表明,拟议的方法可以大大减少估算的延迟,同时略有性能损失。