Angle Estimation for Terahertz Ultra-Massive MIMO-Based Space-to-Air Communications

Autor:	Liao, Anwen, Gao, Zhen, Yang, Yang, Nguyen, Ha H., Wang, Hua, Yin, Hao
Rok vydání:	2021
Předmět:	Computer Science - Information Theory Electrical Engineering and Systems Science - Signal Processing
Druh dokumentu:	Working Paper
Popis:	This paper investigates terahertz ultra-massive (UM)-MIMO-based angle estimation for space-to-air communications, which can solve the performance degradation problem caused by the dual delay-beam squint effects of terahertz UM-MIMO channels. Specifically, we first design a grouping true-time delay unit module that can significantly mitigate the impact of delay-beam squint effects to establish the space-to-air THz link. Based on the subarray selection scheme, the UM hybrid array can be equivalently considered as a low-dimensional fully-digital array, and then the fine estimates of azimuth/elevation angles at both UAVs and satellite can be separately acquired using the proposed prior-aided iterative angle estimation algorithm. The simulation results that close to Cram\'{e}r-Rao lower bounds verify the effectiveness of our solution. Comment: Accepted by IEEE/CIC International Conference on Communications in China. arXiv admin note: text overlap with arXiv:2103.01829
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2108.00675 Zobrazit plný text záznamu View this record from Arxiv