Saved in:
| Main Authors: | , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2509.03488 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915477938241536 |
|---|---|
| author | Rivas-Costa, Miguel Mosquera, Carlos |
| author_facet | Rivas-Costa, Miguel Mosquera, Carlos |
| contents | Hybrid Analog and Digital (HAD) architectures provide a cost-effective alternative for large-scale antenna arrays, but accurate Direction-of-Arrival (DoA) estimation remains challenging due to limited digital dimensionality and constrained beamforming design. In this work, we propose a HAD architecture that employs Butler matrices to synthesize DFT beams over a uniform linear array. By exploiting the Cauchy-like displacement structure of the beamformed signal, we introduce a second-order statistics estimation algorithm that achieves near-optimal accuracy, approaching the Cramér-Rao Lower Bound (CRLB) and outperforming state-of-the-art methods in simulation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_03488 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Efficient DoA Estimation with Hybrid Linear and Rectangular Arrays Using Compact DFT Codebook Rivas-Costa, Miguel Mosquera, Carlos Signal Processing Hybrid Analog and Digital (HAD) architectures provide a cost-effective alternative for large-scale antenna arrays, but accurate Direction-of-Arrival (DoA) estimation remains challenging due to limited digital dimensionality and constrained beamforming design. In this work, we propose a HAD architecture that employs Butler matrices to synthesize DFT beams over a uniform linear array. By exploiting the Cauchy-like displacement structure of the beamformed signal, we introduce a second-order statistics estimation algorithm that achieves near-optimal accuracy, approaching the Cramér-Rao Lower Bound (CRLB) and outperforming state-of-the-art methods in simulation. |
| title | Efficient DoA Estimation with Hybrid Linear and Rectangular Arrays Using Compact DFT Codebook |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2509.03488 |