Fast Channel Estimation and Beam Tracking for Millimeter Wave Vehicular Communications
Online Publication Date2019-09-28
Print Publication Date2019
Permanent link to this recordhttp://hdl.handle.net/10754/661258
MetadataShow full item record
AbstractMillimeter wave (mmWave) has been claimed to be the only viable solution for high-bandwidth vehicular communications. However, frequent channel estimation and beamforming required to provide a satisfactory quality of service limits mmWave for vehicular communications. In this paper, we propose a novel channel estimation and beam tracking framework for mmWave communications in a vehicular network setting. For channel estimation, we propose an algorithm termed robust adaptive multi-feedback (RAF) that achieves comparable estimation performance as existing channel estimation algorithms, with a significantly smaller number of feedback bits. We derive upper and lower bounds on the probability of estimation error (PEE) of the RAF algorithm, given a number of channel estimations, whose accuracy is verified through Monte Carlo simulations. For beam tracking, we propose a new practical model for mmWave vehicular communications. In contrast to the prior works, the model is based on position, velocity, and channel coefficient, which allows a significant improvement of the tracking performance. Focused on the new beam tracking model, we re-derive the equations for Jacobian matrices, reducing the complexity for vehicular communications. An extensive number of simulations is conducted to show the superiority of our proposed channel estimation method and beam tracking algorithm in comparison with the existing algorithms and models. Our simulations suggest that the RAF algorithm can achieve the desired PEE, while on average, reducing the feedback overhead by 75.5% and the total channel estimation time by 14%. The beam tracking algorithm is also shown to significantly improve beam tracking performance, allowing more room for data transmission.
CitationShaham, S., Ding, M., Kokshoorn, M., Lin, Z., Dang, S., & Abbas, R. (2019). Fast Channel Estimation and Beam Tracking for Millimeter Wave Vehicular Communications. IEEE Access, 7, 141104–141118. doi:10.1109/access.2019.2944308
SponsorsThis work was supported by the Australian Research Council (ARC) Discovery under Project DP190101988.
Except where otherwise noted, this item's license is described as (c) 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.