@inproceedings{5e4a942d2ab744ed8265c84224fc040b,
title = "Angle estimation for terahertz ultra-massive MIMO-based space-to-air communications",
abstract = "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.",
keywords = "Angle estimation, Satellite and UAV communications, Terahertz, Ultra-massive MIMO",
author = "Anwen Liao and Zhen Gao and Yang Yang and Nguyen, {Ha H.} and Hua Wang and Hao Yin",
note = "Publisher Copyright: {\textcopyright} 2021 IEEE.; 2021 IEEE/CIC International Conference on Communications in China, ICCC 2021 ; Conference date: 28-07-2021 Through 30-07-2021",
year = "2021",
month = jul,
day = "28",
doi = "10.1109/ICCC52777.2021.9580418",
language = "English",
series = "2021 IEEE/CIC International Conference on Communications in China, ICCC 2021",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "776--781",
booktitle = "2021 IEEE/CIC International Conference on Communications in China, ICCC 2021",
address = "United States",
}