A Doppler shift estimation algorithm with low computational complexity for underwater acoustic communication

2015 ◽  
Author(s):  
Jie Yang ◽  
Xiangtian Liu ◽  
Fengqi Yu
Keyword(s):  
Computational Complexity ◽  
Acoustic Communication ◽  
Doppler Shift ◽  
Estimation Algorithm ◽  
Underwater Acoustic Communication ◽  
Underwater Acoustic ◽  
Low Computational Complexity

scholarly journals Research of Mobile Underwater Acoustic Communication of M-Ary Combining FDM and Piecewise-LFM

2019 ◽  
Vol 37 (4) ◽  
pp. 704-713
Author(s):  
Fulong Li ◽  
Xiaohong Shen ◽  
Ling Wang ◽  
Haiyan Wang
Keyword(s):  
Acoustic Communication ◽  
Doppler Shift ◽  
Cross Correlation ◽  
Piecewise Linear ◽  
Doppler Frequency ◽  
Underwater Acoustic Communication ◽  
Spectrum Utilization ◽  
Underwater Acoustic ◽  
Communication Scheme ◽  
The Cross

Aiming at the countering doppler shift, a mobile underwater acoustic communication scheme of M-ary via FDM-PLFM is proposed. The cross-correlation between piecewise linear frequency modulation(PLFM) and traditional LFM signal is analyzed based on the cross-correlation function. Combining with frequency division multiplexing(FDM), the spectrum utilization of traditional underwater acoustic LFM communication scheme is improved. With the underwater acoustic LFM communication scheme, the new scheme does not require the doppler frequency shift compensation at the low doppler shift. The simulation results show that the present scheme has lower bit error rate than that for the traditional underwater acoustic M-ary LFM communication method under higher data rate conditions.

scholarly journals A Comparative Study on Channel Coding Scheme for Underwater Acoustic Communication

2021 ◽  
Author(s):  
Mustafa Sami Ahmed ◽  
Nor Shahida Mohd Shah
Keyword(s):  
Computational Complexity ◽  
Acoustic Communication ◽  
Channel Coding ◽  
Underwater Acoustic Communication ◽  
Underwater Acoustic ◽  
Coding Schemes ◽  
Main Challenge ◽  
Polar Coding ◽  
Shift Keying ◽  
T Distribution

Abstract There are various challenges in underwater acoustic communication (UWA) however bit error rate (BER) is considered as the main challenge as it significantly affects the UWA communication. In this paper, different coding schemes such as Convolution, Turbo, LDPC, and Polar coding based on the t-distribution noise channel are investigated, and binary phase-shift keying (BPSK) modulation with a code rate of 1/2 has considered in the evaluation and analyses. The evaluation of these channel coding schemes is performed based on BER, computational complexity as well as latency. The results have shown the outperform of polar coding in UWA over other channel coding schemes as it has lower BER and lower computational complexity.

Sign in / Sign up

Export Citation Format

Share Document