Zero-Padded FDM-FDCP: Real-Time Signal Processing for Underwater Channels

Thomas R. Dean, Mainak Chowdhury, A. Goldsmith
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引用次数: 3

Abstract

We present an extension of the FDM-FDCP waveform and demonstrate the performance of this waveform in underwater acoustic channels in the presence of AWGN. In this extension, we simply replace the frequency-domain cyclic prefix with guard bands, analogous to zero-padded OFDM. We argue and provide empirical evidence for that this approach in fact improves performance. FDM-FDCP is designed to operate in low-delay, high-Doppler environments; we discuss maximum delay spread that our waveform can tolerate. All modulation and demodulation operations used in this work are accomplished in O(N N) time complexity, implying that FDM-FDCP is suitable for real-time signal processing in underwater channels.
零填充FDM-FDCP:水下信道的实时信号处理
我们提出了FDM-FDCP波形的扩展,并演示了该波形在AWGN存在下的水声信道中的性能。在这个扩展中,我们简单地用保护带替换频域循环前缀,类似于补零OFDM。我们论证并提供了经验证据,证明这种方法实际上可以提高性能。FDM-FDCP设计用于低延迟、高多普勒环境;我们讨论了波形所能容忍的最大延迟扩展。本研究中所有调制解调操作的时间复杂度均为0 (N N),表明FDM-FDCP适用于水下信道的实时信号处理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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