The degrees-of-freedom in monostatic ISAC channels: NLoS exploitation vs. reduction
The degrees-of-freedom in monostatic ISAC channels: NLoS exploitation vs. reduction
The degrees of freedom (DoFs) attained in monostatic integrated sensing and communications (ISAC) are analyzed. Specifically, monostatic sensing aims for extracting targetorientation information from the line of sight (LoS) channel between the transmitter and the target, since the Non-LoS (NLoS) paths only contain clutter or interference. By contrast, in wireless communications, typically, both the LoS and NLoS paths are exploited for achieving diversity or multiplexing gains. Hence, we shed light on the NLoS exploitation vs. reduction tradeoffs in a monostatic ISAC scenario. In particular, we optimize the transmit power of each signal path to maximize the communication rate, while guaranteeing the sensing performance for the target. The non-convex problem formulated is firstly solved in closed form for a single-NLoS-link scenario, then we harness the popular successive convex approximation (SCA) method for a general multiple-NLoS-link scenario. Our simulation results characterize the fundamental performance tradeoffs between sensing and communication, demonstrating that the available DoFs in the ISAC channel should be efficiently exploited in a way that is distinctly different from that of communication-only scenarios.
2643 - 2648
Lu, Shihang
86aa35d5-b747-46ad-bfed-cb9ea16cbbaa
Liu, Fan
37818a1c-e047-4342-b996-75c49fb443f7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Lu, Shihang
86aa35d5-b747-46ad-bfed-cb9ea16cbbaa
Liu, Fan
37818a1c-e047-4342-b996-75c49fb443f7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Lu, Shihang, Liu, Fan and Hanzo, Lajos
(2022)
The degrees-of-freedom in monostatic ISAC channels: NLoS exploitation vs. reduction.
IEEE Transactions on Vehicular Technology, 72 (2), .
(doi:10.1109/TVT.2022.3210307).
Abstract
The degrees of freedom (DoFs) attained in monostatic integrated sensing and communications (ISAC) are analyzed. Specifically, monostatic sensing aims for extracting targetorientation information from the line of sight (LoS) channel between the transmitter and the target, since the Non-LoS (NLoS) paths only contain clutter or interference. By contrast, in wireless communications, typically, both the LoS and NLoS paths are exploited for achieving diversity or multiplexing gains. Hence, we shed light on the NLoS exploitation vs. reduction tradeoffs in a monostatic ISAC scenario. In particular, we optimize the transmit power of each signal path to maximize the communication rate, while guaranteeing the sensing performance for the target. The non-convex problem formulated is firstly solved in closed form for a single-NLoS-link scenario, then we harness the popular successive convex approximation (SCA) method for a general multiple-NLoS-link scenario. Our simulation results characterize the fundamental performance tradeoffs between sensing and communication, demonstrating that the available DoFs in the ISAC channel should be efficiently exploited in a way that is distinctly different from that of communication-only scenarios.
Text
TVTCorrespondence_Final
- Accepted Manuscript
More information
e-pub ahead of print date: 30 September 2022
Additional Information:
This work was supported in part by Special Funds for the Cultivation of Guangdong College Students’ Scientific and Technological Innovation (“Climbing Program” Special Funds, No. pdjh2022c0028), and in part by the National Natural Science Foundation of China under Grant 62101234, and in part by the Young Elite Scientist Sponsorship Program by CAST under Grant No. YESS20210055. L. Hanzo would like to acknowledge the financial support of the Engineering and Physical Sciences Research Council projects EP/W016605/1 and EP/P003990/1 (COALESCE) as well as of the European Research Council’s Advanced Fellow Grant QuantCom (Grant No. 789028).
Identifiers
Local EPrints ID: 484594
URI: http://eprints.soton.ac.uk/id/eprint/484594
ISSN: 0018-9545
PURE UUID: 8d2666d2-19dc-44b5-9bca-5e531a04272c
Catalogue record
Date deposited: 17 Nov 2023 17:57
Last modified: 18 Mar 2024 02:36
Export record
Altmetrics
Contributors
Author:
Shihang Lu
Author:
Fan Liu
Author:
Lajos Hanzo
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics