ARIS-RSMA Enhanced ISAC System: Joint Rate Splitting and Beamforming Design

• URL: http://arxiv.org/abs/2602.06399v1
• Date: Fri, 06 Feb 2026 05:38:32 GMT
• Title: ARIS-RSMA Enhanced ISAC System: Joint Rate Splitting and Beamforming Design
• Authors: Xin Jin, Tiejun Lv, Yashuai Cao, Jie Zeng, Mugen Peng,
• Abstract summary: This letter proposes an active reconfigurable intelligent surface (ARIS) assisted-splitting multiple access (RSMA) integrated sensing and communication (ISAC) system to overcome the rate in multi-target bottleneck under obstructed line-of-sight environments.
• Score: 36.825812828831694
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: This letter proposes an active reconfigurable intelligent surface (ARIS) assisted rate-splitting multiple access (RSMA) integrated sensing and communication (ISAC) system to overcome the fairness bottleneck in multi-target sensing under obstructed line-of-sight environments. Beamforming at the transceiver and ARIS, along with rate splitting, are optimized to maximize the minimum multi-target echo signal-to-interference-plus-noise ratio under multi-user rate and power constraints. The intricate non-convex problem is decoupled into three subproblems and solved iteratively by majorization-minimization (MM) and sequential rank-one constraint relaxation (SROCR) algorithms. Simulations show our scheme outperforms nonorthogonal multiple access, space-division multiple access, and passive RIS baselines, approaching sensing-only upper bounds.

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