Low-Complexity Joint Transceiver Optimization for MmWave/THz MU-MIMO ISAC Systems

In this article, we consider the problem of joint transceiver design for millimeter-wave (mmWave)/terahertz (THz) multiuser MIMO integrated sensing and communication (ISAC) systems. Such a problem is formulated into a nonconvex optimization problem, with the objective of maximizing a weighted sum of...

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Vydané v:IEEE internet of things journal Ročník 12; číslo 5; s. 5289 - 5304
Hlavní autori: Wang, Peilan, Fang, Jun, Zeng, Xianlong, Chen, Zhi, Li, Hongbin
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Piscataway IEEE 01.03.2025
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:
Algorithms
Array signal processing
Automation
Beamforming
Clutter
Communication
Complexity
Exact solutions
Hybrid precoding/beamforming
Integrated sensing and communication
integrated sensing and communication (ISAC)
Internet of Things
millimeter wave (mmWave)
Millimeter wave communication
Millimeter waves
MIMO communication
Optimization
Radar
Radar antennas
Radar cross-sections
Radio frequency
Signal paths
Subspaces
terahertz (THz)
Transceivers
Transmitting antennas
Vectors
ISSN:2327-4662, 2327-4662
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Popis
Shrnutí:In this article, we consider the problem of joint transceiver design for millimeter-wave (mmWave)/terahertz (THz) multiuser MIMO integrated sensing and communication (ISAC) systems. Such a problem is formulated into a nonconvex optimization problem, with the objective of maximizing a weighted sum of communication users' rates and the passive radar's signal-to-clutter-and-noise ratio (SCNR). By exploring a low-dimensional subspace property of the optimal precoder, a low-dimensional subspace property-inspired block-coordinate-descent (LS-BCD)-based algorithm is proposed with remarkably reduced computational complexity. Our analysis reveals that the hybrid analog/digital beamforming structure can attain the same performance as that of a fully digital precoder, provided that the number of radio frequency (RF) chains is no less than the number of resolvable signal paths. Also, through expressing the precoder as a sum of a communication-precoder and a sensing-precoder, we develop an analytical solution to the joint transceiver design problem by generalizing the idea of block diagonalization (BD) to the ISAC system. Simulation results show that with a proper tradeoff parameter, the proposed methods can achieve a decent compromise between communication and sensing, where the performance of each communication/sensing task experiences only a mild performance loss as compared with the performance attained by optimizing exclusively for a single task.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:2327-4662
2327-4662
DOI:10.1109/JIOT.2024.3486270