Fast Randomized-MUSIC for mm-Wave Massive MIMO Radars
Abstract
Subspace methods are essential to high-resolution environment sensing in the emerging unmanned systems, if further combined with the millimeter-wave (mm-Wave) massive multi-input multi-output (MIMO) technique. The estimation of signal/noise subspace, as one critical step, is yet computationally complex and presents a particular challenge when developing high-resolution yet low-complexity automotive radars. In this work, we develop a fast randomized-MUSIC (R-MUSIC) algorithm, which exploits the random matrix sketching to estimate the signal subspace via approximated computation. Our new approach substantially reduces the time complexity in acquiring a high-quality signal subspace. Moreover, the accuracy of R-MUSIC suffers no degradation unlike others low-complexity counterparts, i.e. the high-resolution angle of arrival (AoA) estimation is attained. Numerical simulations are provided to validate the performance of our R-MUSIC method. As shown, it resolves the long-standing contradiction in complexity and accuracy of MIMO radar signal processing, which hence have great potentials in real-time super-resolution automotive sensing.
Keywords
Cite
@article{arxiv.2101.04570,
title = {Fast Randomized-MUSIC for mm-Wave Massive MIMO Radars},
author = {Li Bin and Wang Shuseng and Zhang Jun and Cao Xianbin and Zhao Chenglin},
journal= {arXiv preprint arXiv:2101.04570},
year = {2021}
}