Null subcarriers based Doppler scale estimation with polynomial interpolation for multicarrier communication over ultrawideband underwater acoustic channels

Yang, Chen; Yin, Jingwei; Zou, Ling; Yang, Dan; Cao, Yuan

doi:10.1109/jsee.2015.00128

Cited by 10 publications

(1 citation statement)

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“…The method is accomplished by searching for those optimal parameters within a predefined dictionary, and it usually employs a greedy algorithm, such as basis pursuit and orthogonal matching pursuit (OMP). The third category makes use of the null carriers in the OFDM symbol, and the estimation is realised with the least squares (LS) algorithm [9]. However, the underwater acoustic channel is found in the experiments recently that the different paths have different scale factors.…”

Section: Introductionmentioning

confidence: 99%

Parameter estimation based on factor graph in wide‐band OFDM systems

Jiang

Xiang

2019

IET Communications

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Section: Introductionmentioning

confidence: 99%

Parameter estimation based on factor graph in wide‐band OFDM systems

Jiang

Xiang

2019

IET Communications

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Doppler estimation and compensation method for underwater target active detection based on communication signal

Zhang

Shi

et al. 2021

西北工业大学学报

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The integration of underwater detection and communication uses communication signals to detect a target actively, but the Doppler effect deteriorates the parameter estimation performance of the integrated system. To eliminate the influence of the Doppler effect, a joint Doppler estimation and compensation method based on spectrum zooming and correction is proposed. Firstly, the synchronization signal is used to obtain the signal receiving delay and intercept the single-frequency signal segment in the received signal. Then, the discrete Fourier transform is used to find the frequency that corresponds to the maximum amplitude of the single-frequency signal segment. Finally, the frequency spectrum is refined and corrected within the range near the frequency. The Doppler factor is estimated and the received signal is compensated by the Doppler estimation value. The simulation results show that the proposed method improves Doppler factor estimation accuracy, increases the cross-correlation processing gain and improves DOA (direction of arrival) estimation performance, thus being robust to different Doppler effects.

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Research on video sensor networks coverage optimization method in obstacle scene

Zhang

2023

J. Phys.: Conf. Ser.

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Aiming at the presence of obstacles when monitoring wild animals in the forest, an obstacle avoidance method is introduced, and a video sensor networks coverage optimization algorithm for virtual force affected by obstacles fused to an immune clone particle swarm is proposed. The algorithm adjusts locally through virtual forces to reduce the overlapping area and then uses the immune cloning particle swarm algorithm to optimize the global nodes to improve the coverage of nodes in the obstacle scene. The simulation results show that the algorithm proposed in this paper can improve the coverage of nodes.

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Null subcarriers based Doppler scale estimation with polynomial interpolation for multicarrier communication over ultrawideband underwater acoustic channels

Cited by 10 publications

References 0 publications

Parameter estimation based on factor graph in wide‐band OFDM systems

Parameter estimation based on factor graph in wide‐band OFDM systems

Doppler estimation and compensation method for underwater target active detection based on communication signal

Research on video sensor networks coverage optimization method in obstacle scene

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