Journal
IEEE ACCESS
Volume 10, Issue -, Pages 54922-54935Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2022.3175974
Keywords
Direction-of-arrival estimation; Estimation; Array signal processing; Radio frequency; Training; Symbols; OFDM; Millimeter-wave; DoA estimation; hybrid beamforming; array of subarrays
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Funding
- Incheon National University Research Grant [2020-0265]
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This paper investigates the problem of direction-of-arrival (DoA) estimation for a hybrid array of subarrays in millimeter-wave communication systems. The proposed method jointly exploits multiple outputs in the time domain for high-resolution DoA estimation. It designs an optimal hybrid combiner to maximize beamforming gain and reduces receiver complexity with block-wise processing. The performance of the proposed method and its extension to a uniform planar array case are analyzed, and the numerical results demonstrate its effectiveness.
In this paper, the problem of direction-of-arrival (DoA) estimation for a hybrid array of subarrays is considered in millimeter-wave communication systems. Unlike much prior work using the outputs from the analog subarrays with symbol-wise processing, the proposed framework jointly exploits multiple outputs in time domain for high-resolution DoA estimation. With block-wise processing, the proposed method designs an optimal hybrid combiner maximizing beamforming gain, while reducing a receiver complexity based on fast Fourier transform filtering for each blocked signal. The performance of the proposed method is analyzed, including estimation performance with a limited training signal, training overhead, and computational complexity. An extension of the proposed method to a uniform planar array case is also discussed. Numerical results show the effectiveness of the proposed algorithm.
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