Distributed compressed sensing estimation of underwater acoustic OFDM channel

Zhou, Yuehai; Tong, Feng; Zhang, Gangqiang

doi:10.1016/j.apacoust.2016.10.021

Cited by 44 publications

(21 citation statements)

References 20 publications

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“…The time-varying response of the sea trial channel is shown in Fig. 8 [10]. One may observe that it exhibits apparent Doppler shift caused by the relative motion of the transceiver platform, which is mainly determined by the relative motion speed, and the Doppler variation is small over this short period.…”

Section: Experimental Results and Analysismentioning

confidence: 97%

Doppler correction of mobile acoustic communication via adjustable AD sampling rate

Wang

Zheng

Tao

et al. 2018

Proceedings of the Thirteenth ACM International Conference on Underwater Networks &Amp; Systems

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1 This paper presents a hardware Doppler suppression method for underwater acoustic (UWA) communication with compact-sized underwater platforms such as autonomous underwater vehicles (AUVs). The proposed method adopts an adjustable AD (analogto-digital) sampling rate, leading to significant reductions in the computational complexity of the communication receiver. Both direct sequence spread spectrum (DSSS) and channel coding technology are incorporated into the proposed Doppler compensation method to design a mobile UWA communication system. Sea experiments have been conducted with moving vehicles, and the experimental results have demonstrated the effectiveness of the proposed method.

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Section: Experimental Results and Analysismentioning

confidence: 97%

Doppler correction of mobile acoustic communication via adjustable AD sampling rate

Wang

Zheng

Tao

et al. 2018

Proceedings of the Thirteenth ACM International Conference on Underwater Networks &Amp; Systems

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“…It is noticeable that the spectrum of AUV noise overlaps with that of the acoustic communication signal, leading to certain interference on communication performance. The channel response of the second trial is shown in Figure 12, which indicates the simultaneous presence of an apparent multipath and Doppler [14].…”

Section: Autonomous Underwater Vehicle (Auv) Integration Results Amentioning

confidence: 99%

Design and Evaluation of an Acoustic Modem for a Small Autonomous Unmanned Vehicle

Zheng

Tong

et al. 2019

Sensors

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Design of underwater acoustic (UWA) modems for compact-sized, underwater platforms such as autonomous underwater vehicles (AUVs) is challenging because of the practical requirement to keep an engineering balance between the performance and the system overhead. Considering this type of mobile communication scenario, Doppler spread as well as the multipath draws substantial attention in implementing the system’s design and engineering. Specifically, for a small AUV, the large computational complexity of real-time resampling for the classic Doppler correction poses significant difficulty for the limited capability of the low-cost processor. In this paper, by adopting an adjustable AD (analog-to-digital) sampling rate, a Doppler compensation approach is proposed to enable low-complexity hardware implementation. Based on this, a direct sequence spread spectrum (DSSS) acoustic modem is designed for a low-cost, small-sized AUV. Meanwhile, the performance evaluation of this acoustic modem is conducted in terms of the robustness upon varying Doppler as well as AUV integration. Finally, experimental results performed on a commercial, small-sized AUV under different speeds are reported to verify the effectiveness of the proposed acoustic modem.

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“…Notation D is a matrix with the elements of transmitted symbols on its diagonal. After Doppler estimation and Doppler compensation, we use the following model to estimate channel impulse response in time domain [33]…”

Section: System Modelmentioning

confidence: 99%

Research and Development of a Highly Reconfigurable OFDM MODEM for Shallow Water Acoustic Communication

Zhou

Tong

2019

IEEE Access

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Orthogonal frequency division multiplexing (OFDM) provides an effective approach to combat multipath with high bandwidth efficiency for underwater acoustic communication, thus design and implementation of acoustic OFDM MODEMs draw more and more attention. Extensive work has been performed to mitigate multipath, Doppler shift, and peak average power ratio from the viewpoint of theoretical analysis. Meanwhile, design and implementation of a parameter-configurable OFDM to adapt to highly diverse underwater channels and various missions become more and more important. Traditional MODEM with fixed parameters cannot achieve the best tradeoff between data rate and bit error rate. In order to obtain the best communication performance under long time delay channels, Doppler channels, and frequency-selective channels, in this paper, we provide the design and implementation of a parameterconfigurable underwater acoustic OFDM MODEM with the purpose to achieve flexibility. Specifically, the reconfigurable parameters of the OFDM MODEM include the number of receivers, the number of null subcarriers, the number of pilot subcarriers, as well as the type of channel estimation algorithms. The number of pilot subcarriers and type of channel estimation methods are determined based on channel characteristics, the number of null subcarriers is determined based on the Doppler shift, and the number of the received channels is based on fading channel. Moreover, in this paper, the Doppler estimation performance under different number of null subcarriers, and the channel estimation performance under different number of pilot subcarriers and under different channel estimation algorithms, are analyzed in terms of bit error rate. Finally, the effectiveness of the proposed highly configurable OFDM MODEM is demonstrated by two sea trials corresponding to different communication scenarios. INDEX TERMS Shallow water acoustic communication, underwater acoustic OFDM MODEM, hardware and software design, parameter-configurable MODEM.

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Distributed compressed sensing estimation of underwater acoustic OFDM channel

Cited by 44 publications

References 20 publications

Doppler correction of mobile acoustic communication via adjustable AD sampling rate

Doppler correction of mobile acoustic communication via adjustable AD sampling rate

Design and Evaluation of an Acoustic Modem for a Small Autonomous Unmanned Vehicle

Research and Development of a Highly Reconfigurable OFDM MODEM for Shallow Water Acoustic Communication

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