Wang, Yiran;
Hu, Xiaoyan;
Li, Ang;
Masouros, Christos;
Wong, Kai-Kit;
Yang, Kun;
(2025)
ISAC Enhancement with Interference Exploitation: From A Uniform Viewpoint for Symbol Level and Block Level.
IEEE Transactions on Vehicular Technology
pp. 1-15.
10.1109/TVT.2025.3627423.
(In press).
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Abstract
In this paper, we investigate the precoding design based on the concept of constructive interference (CI) for multiple-input multiple-output (MIMO) integrated sensing and communication (ISAC) systems. In particular, we explore the CI-based precoding in both symbol and block levels from a uniform viewpoint, where the radar illumination power is maximized under CI constraint to enhance the sensing performance with guaranteed communication performance. The successive convex approximation (SCA) method is leveraged to effectively solve the formulated non-convex optimization problem. In specific algorithm design, the total power constraint and per-antenna power constraint are considered respectively in order to meet different hardware requirements. Under the total power constraint, we formulate the dual problem of the convex subproblem during SCA processing, which can be efficiently solved by Hooke-Jeeves pattern search algorithm. Under the per-antenna power constraint, we propose a light-weight parallel algorithm based on the alternate direction multiplier method (ADMM). Simulation results show the advantages of the CI-based precoding schemes in enhancing ISAC performance. Under the total power constraint, the proposed CI-based symbol-level precoding (CI-SLP) scheme can achieve satisfactory ISAC performance with low complexity. Under the per-antenna power constraint, the CI-SLP scheme suffers performance loss due to the stringent power constraint, while the performance advantage of the CI-based block-level precoding (CI-BLP) scheme becomes prominent.
| Type: | Article |
|---|---|
| Title: | ISAC Enhancement with Interference Exploitation: From A Uniform Viewpoint for Symbol Level and Block Level |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/TVT.2025.3627423 |
| Publisher version: | https://doi.org/10.1109/tvt.2025.3627423 |
| Language: | English |
| Additional information: | This version is the author-accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Integrated sensing and communication, constructive interference, symbol-level precoding, block-level precoding |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10217545 |
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