Approximate Message Passing-Enhanced Graph Neural Network for OTFS Data Detection
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913313454030848 |
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| author | Zhuang, Wenhao Mao, Yuyi He, Hengtao Xie, Lei Song, Shenghui Ge, Yao Ding, Zhi |
| author_facet | Zhuang, Wenhao Mao, Yuyi He, Hengtao Xie, Lei Song, Shenghui Ge, Yao Ding, Zhi |
| contents | Orthogonal time frequency space (OTFS) modulation has emerged as a promising solution to support high-mobility wireless communications, for which, cost-effective data detectors are critical. Although graph neural network (GNN)-based data detectors can achieve decent detection accuracy at reasonable computational cost, they fail to best harness prior information of transmitted data. To further minimize the data detection error of OTFS systems, this letter develops an AMP-GNN-based detector, leveraging the approximate message passing (AMP) algorithm to iteratively improve the symbol estimates of a GNN. Given the inter-Doppler interference (IDI) symbols incur substantial computational overhead to the constructed GNN, learning-based IDI approximation is implemented to sustain low detection complexity. Simulation results demonstrate a remarkable bit error rate (BER) performance achieved by the proposed AMP-GNN-based detector compared to existing baselines. Meanwhile, the proposed IDI approximation scheme avoids a large amount of computations with negligible BER degradation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_10071 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Approximate Message Passing-Enhanced Graph Neural Network for OTFS Data Detection Zhuang, Wenhao Mao, Yuyi He, Hengtao Xie, Lei Song, Shenghui Ge, Yao Ding, Zhi Signal Processing Information Theory Orthogonal time frequency space (OTFS) modulation has emerged as a promising solution to support high-mobility wireless communications, for which, cost-effective data detectors are critical. Although graph neural network (GNN)-based data detectors can achieve decent detection accuracy at reasonable computational cost, they fail to best harness prior information of transmitted data. To further minimize the data detection error of OTFS systems, this letter develops an AMP-GNN-based detector, leveraging the approximate message passing (AMP) algorithm to iteratively improve the symbol estimates of a GNN. Given the inter-Doppler interference (IDI) symbols incur substantial computational overhead to the constructed GNN, learning-based IDI approximation is implemented to sustain low detection complexity. Simulation results demonstrate a remarkable bit error rate (BER) performance achieved by the proposed AMP-GNN-based detector compared to existing baselines. Meanwhile, the proposed IDI approximation scheme avoids a large amount of computations with negligible BER degradation. |
| title | Approximate Message Passing-Enhanced Graph Neural Network for OTFS Data Detection |
| topic | Signal Processing Information Theory |
| url | https://arxiv.org/abs/2402.10071 |