Detecting OSDM Signals in Sparse Channels and Snapping Shrimp Noise
Detecting OSDM Signals in Sparse Channels and Snapping Shrimp Noise
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检测稀疏通道中的 OSDM 信号并捕捉虾噪声
DOI：
10.1109/ucomms.2018.8493187
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
M. Chitre
中科院分区：
文献类型：
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作者：
Ahmed Mahmood;M. Chitre
正交信号分复用 (OSDM) 是一种多载波方案，已被建议作为正交频分复用 (OFDM) 的可行替代方案。前者在相同时频资源下提供更低的峰均功率比 (PAPR) 和多普勒阻力，从而优于同类产品。因此，由于水声信道的时变特性，最近的研究表明抗多普勒（D-OSDM）是解决水声通信问题的一个有吸引力的解决方案。我们研究了 D-OSDM 在虾虾（脉冲）噪声和浅水稀疏通道设置方面的性能。我们进一步建议最大限度地减少利用通道稀疏性并且对虾噪声也具有鲁棒性的约束 L1 范数。该方法还在严重脉冲平稳$\alpha$-亚高斯噪声中进行了测试。我们提出的解决方案与当代检测方法相比具有显着的性能提升，并强调了 D-OSDM 对抗脉冲噪声的能力。
Orthogonal signal-division multiplexing (OSDM), a multi-carrier scheme, has been suggested to be a viable alternative to orthogonal frequency division multiplexing (OFDM). The former outperforms its counterpart by offering lower peak-to-average power ratio (PAPR) and Doppler resistance for the same time-frequency resource. Consequently, due to the time-varying nature of the underwater acoustic channel, recent works have suggested Doppler-resistant (D-OSDM) to be an attractive solution for the underwater acoustic communication problem. We investigate the performance of D-OSDM in snapping shrimp (impulsive) noise and a sparse channel setup for shallow waters. We further propose to minimize a constrained L1 -norm that exploits channel sparsity and is also robust to snapping shrimp noise. The approach is also tested in severely impulsive stationary $\alpha $ -sub-Gaussian noise. Our proposed solution offers significant performance gains over con-temporary detection methods and underscores D-OSDM's ability to counter impulsive noise.