Multi-Target Integrated Sensing and Communications in Massive MIMO Systems
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866929567543853056 |
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| author | Topal, Ozan Alp Demir, Özlem Tuğfe Björnson, Emil Cavdar, Cicek |
| author_facet | Topal, Ozan Alp Demir, Özlem Tuğfe Björnson, Emil Cavdar, Cicek |
| contents | Integrated sensing and communications (ISAC) allows networks to perform sensing alongside data transmission. While most ISAC studies focus on single-target, multi-user scenarios, multi-target sensing is scarcely researched. This letter examines the monostatic sensing performance of a multi-target massive MIMO system, aiming to minimize the sum of Cramér-Rao lower bounds (CRLBs) for target direction-of-arrival estimates while meeting user equipment (UE) rate requirements. We propose several precoding schemes, comparing sensing performance and complexity, and find that sensing-focused precoding with power allocation for communication achieves near-optimal performance with 20 times less complexity than joint precoding. Additionally, time-sharing between communication and sensing outperforms simple time division, highlighting the benefits of resource-sharing for ISAC. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_22532 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Multi-Target Integrated Sensing and Communications in Massive MIMO Systems Topal, Ozan Alp Demir, Özlem Tuğfe Björnson, Emil Cavdar, Cicek Signal Processing Integrated sensing and communications (ISAC) allows networks to perform sensing alongside data transmission. While most ISAC studies focus on single-target, multi-user scenarios, multi-target sensing is scarcely researched. This letter examines the monostatic sensing performance of a multi-target massive MIMO system, aiming to minimize the sum of Cramér-Rao lower bounds (CRLBs) for target direction-of-arrival estimates while meeting user equipment (UE) rate requirements. We propose several precoding schemes, comparing sensing performance and complexity, and find that sensing-focused precoding with power allocation for communication achieves near-optimal performance with 20 times less complexity than joint precoding. Additionally, time-sharing between communication and sensing outperforms simple time division, highlighting the benefits of resource-sharing for ISAC. |
| title | Multi-Target Integrated Sensing and Communications in Massive MIMO Systems |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2410.22532 |