A Hybrid Antenna Switching Scheme for Dynamic Channel Sounding
Al-Ameri, Ali LU ; Park, Jaeyoung ; Sanchez, Juan LU ; Cai, Xuesong LU and Tufvesson, Fredrik LU
(2023)
97th IEEE Vehicular Technology Conference, VTC 2023-Spring
- Abstract
Channel sounding is essential for the development of radio systems. One flexible strategy is the switched-array-based channel sounding, where antenna elements are activated at different time instants to measure the channel spatial characteristics. Although its hardware complexity is decreased due to fewer radio-frequency (RF) chains, sequentially switching the antenna elements can result in aliasing in the joint estimation of angles and Doppler frequencies of multipath components (MPCs). Therefore, pseudo-random switching has been proposed to mitigate such aliasing and increase estimation accuracy in both angular and Doppler domains. Nevertheless, the increased Doppler resolution could cause additional post-processing complexity of... (More)
Channel sounding is essential for the development of radio systems. One flexible strategy is the switched-array-based channel sounding, where antenna elements are activated at different time instants to measure the channel spatial characteristics. Although its hardware complexity is decreased due to fewer radio-frequency (RF) chains, sequentially switching the antenna elements can result in aliasing in the joint estimation of angles and Doppler frequencies of multipath components (MPCs). Therefore, pseudo-random switching has been proposed to mitigate such aliasing and increase estimation accuracy in both angular and Doppler domains. Nevertheless, the increased Doppler resolution could cause additional post-processing complexity of parameter estimation, which is relevant when the Doppler frequencies are not of interest, e.g., for spatial channel modeling. This paper proposes an improved hybrid sequential and random switching scheme. The primary purpose is to maintain the estimation accuracy of angles of MPCs while decreasing the resolution of Doppler frequencies for minimized complexity of channel parameter estimation. A simulated-annealing algorithm is exploited to obtain an optimized switching sequence. The effectiveness of the proposed scheme is also demonstrated with a realistic antenna array.
(Less)
- author
- Al-Ameri, Ali
LU
; Park, Jaeyoung
; Sanchez, Juan
LU
; Cai, Xuesong
LU
and Tufvesson, Fredrik
LU
- organization
- publishing date
- 2023
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Channel sounding, dynamic channel, parameter estimation, switched antenna array, switching sequence
- host publication
- 2023 IEEE 97th Vehicular Technology Conference, VTC 2023-Spring - Proceedings
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- conference name
- 97th IEEE Vehicular Technology Conference, VTC 2023-Spring
- conference location
- Florence, Italy
- conference dates
- 2023-06-20 - 2023-06-23
- external identifiers
-
- scopus:85169785762
- ISBN
- 979-8-3503-1115-0
- 9798350311143
- DOI
- 10.1109/VTC2023-Spring57618.2023.10199525
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2023 IEEE.
- id
- c32a912e-edea-4d12-95fd-811c395a8777
- date added to LUP
- 2023-11-15 11:44:44
- date last changed
- 2024-04-18 02:58:10
@inproceedings{c32a912e-edea-4d12-95fd-811c395a8777,
abstract = {{<p>Channel sounding is essential for the development of radio systems. One flexible strategy is the switched-array-based channel sounding, where antenna elements are activated at different time instants to measure the channel spatial characteristics. Although its hardware complexity is decreased due to fewer radio-frequency (RF) chains, sequentially switching the antenna elements can result in aliasing in the joint estimation of angles and Doppler frequencies of multipath components (MPCs). Therefore, pseudo-random switching has been proposed to mitigate such aliasing and increase estimation accuracy in both angular and Doppler domains. Nevertheless, the increased Doppler resolution could cause additional post-processing complexity of parameter estimation, which is relevant when the Doppler frequencies are not of interest, e.g., for spatial channel modeling. This paper proposes an improved hybrid sequential and random switching scheme. The primary purpose is to maintain the estimation accuracy of angles of MPCs while decreasing the resolution of Doppler frequencies for minimized complexity of channel parameter estimation. A simulated-annealing algorithm is exploited to obtain an optimized switching sequence. The effectiveness of the proposed scheme is also demonstrated with a realistic antenna array.</p>}},
author = {{Al-Ameri, Ali and Park, Jaeyoung and Sanchez, Juan and Cai, Xuesong and Tufvesson, Fredrik}},
booktitle = {{2023 IEEE 97th Vehicular Technology Conference, VTC 2023-Spring - Proceedings}},
isbn = {{979-8-3503-1115-0}},
keywords = {{Channel sounding; dynamic channel; parameter estimation; switched antenna array; switching sequence}},
language = {{eng}},
publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
title = {{A Hybrid Antenna Switching Scheme for Dynamic Channel Sounding}},
url = {{http://dx.doi.org/10.1109/VTC2023-Spring57618.2023.10199525}},
doi = {{10.1109/VTC2023-Spring57618.2023.10199525}},
year = {{2023}},
}