期刊
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
卷 22, 期 5, 页码 3071-3083出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TWC.2022.3215965
关键词
Estimation; Millimeter wave communication; Wireless communication; Sensor arrays; Direction-of-arrival estimation; Massive MIMO; Array signal processing; Direction-of-arrival (DOA) estimation; polarization estimation; polarized massive multiple-input multiple-output (MIMO) system; millimeter wave (mmWave) communication; compressive sampling
This paper proposes a compressive sampling framework for two-dimensional DOA and polarization estimation in mmWave polarized massive MIMO systems. The proposed approach reduces data volume through a reduced-dimension matrix and computes the signal subspace via eigendecomposition. It also utilizes rotational invariance characteristic to form a normalized polarization steering vector and applies the Poynting vector and least squares techniques for 2D-DOA and polarization estimation.
The polarized massive multiple-input multiple-output (MIMO) technique has been regarded as a promising solution to millimeter wave (mmWave) communication systems, because it experiences more degrees-of-freedom than the scalar configuration, and it represents a significant opportunity for secure communication. To deliver smart service to terminals, it is essential to provide base stations (BS) with the capability of terminal's direction-of-arrival (DOA) awareness. In this paper, a compressive sampling (CS) framework is proposed for two-dimensional (2D) DOA and polarization estimation in mmWave polarized massive MIMO systems. The proposed approach first reduces the data volume via a reduced-dimension matrix. Then it computes the signal subspace via the eigendecomposition of the compressed array measurement. Thereafter, the rotational invariance characteristic is utilized to form a normalized polarization steering vector. Finally, 2D-DOA and polarization are estimated by incorporating the Poynting vector and the least squares (LS) techniques. The proposed architecture is computationally much more economical than existing algorithms. Besides, it allows a mmWave BS to provide comparable estimation performance with arbitrary sensor geometry, which is more flexible than most of the existing architectures. Furthermore, it is robust to the sensor position error. Numerical simulations verify the advantages of the proposed framework.
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