Variable Range Resampling for Computationally Efficient Doppler Compensation in Underwater Acoustic Communication
Variable Range Resampling for Computationally Efficient Doppler Compensation in Underwater Acoustic Communication
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DOI：
10.1109/oceanskobe.2018.8559418
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发表时间：
2018-05
期刊：
影响因子：
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通讯作者：
S. Yoshizawa;Takashi Saito;Yusaku Mabuchi;T. Tsukui;Shin-ichi Sawada
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文献类型：
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作者：
S. Yoshizawa;Takashi Saito;Yusaku Mabuchi;T. Tsukui;Shin-ichi Sawada
在浅水水声通信中，由于OFDM具有高选择性频率衰落信道的鲁棒性，因此采用了OFDM。为了对抗OFDM对多普勒的敏感性，重采样被认为是多普勒补偿的有效方法之一。性能下降发生在非均匀多普勒频移，其中多普勒比例因子是不恒定的。我们以前的工作是考虑多普勒频移色散的并行重采样。它提高了多普勒弹性，但需要详尽的计算。研究了一种基于逐帧动态控制并行度的并行重采样接收机的复杂度降低方法，该方法在保证通信性能不变的情况下降低了重采样复杂度。
In shallow-water acoustic communication, OFDM is used owing to robustness with highly selective frequency fading channels. As for the countermeasure of OFDM sensitivity to Doppler, resampling is known as one of effective approaches as Doppler compensation. Performance degradation occurs under non-uniform Doppler shifts where the Doppler scaling factor is not constant. Our previous work presented parallel resampling with considering Doppler shift dispersion. It improved Doppler resilience, however required exhaustive computation. We study complexity reduction of parallel resampling receiver where the degree of parallelism is dynamically controlled on a frame-by-frame basis, This method can reduce complexity of resampling with keeping the same communication performance.