Dependence of demodulation performance on symbol rate for underwater acoustic communication with nonuniform Doppler shift
Dependence of demodulation performance on symbol rate for underwater acoustic communication with nonuniform Doppler shift
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DOI：
10.7567/1347-4065/ab0ad7
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发表时间：
2019-06
影响因子：
1.5
通讯作者：
Mitsuyasu Deguchi;Y. Kida;Yoshitaka Watanabe;T. Shimura
中科院分区：
文献类型：
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作者：
Mitsuyasu Deguchi;Y. Kida;Yoshitaka Watanabe;T. Shimura
在水面与水下航行器的水声通信中，非均匀多普勒频移会严重影响解调性能，这取决于符号速率。在本文中，解调性能的符号速率的依赖关系进行了研究，使用模拟和没有多径信号。结果表明，在非均匀多普勒频移环境下，符号速率对解调性能有重要影响。此外，没有多径信号的仿真结果表明，直接信号的非均匀多普勒频移的影响可以在相对低的符号率被抑制。另一方面，多径信号的仿真结果表明，在具有非均匀多普勒频移的环境下，需要高符号速率来抑制多径信号的影响。
In underwater acoustic communication between surface and underwater vehicles, the nonuniform Doppler shift can degrade demodulation performance severely depending on the symbol rate. In this paper, the dependence of demodulation performance on the symbol rate is investigated using simulations with and without a multipath signal. The results show that symbol rate plays an important role in determining demodulation performance under an environment with a nonuniform Doppler shift. Furthermore, the simulation results without a multipath signal indicate that the effects of a nonuniform Doppler shift of a direct signal can be suppressed at a relatively low symbol rate. On the other hand, the simulation results with a multipath signal show that a high symbol rate is required to suppress the effect of the multipath signal under an environment with a nonuniform Doppler shift.