Volume 37, Number 4, August 2019
|Page(s)||704 - 713|
|Published online||23 September 2019|
Research of Mobile Underwater Acoustic Communication of M-Ary Combining FDM and Piecewise-LFM
School of Marine, Northwestern Polytechnical University, Xi’an 710072, China
2 Key Laboratory of Ocean Acoustics and Sensing Ministry of Industry and Information Technology, Xi’an 710072, China
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.
Key words: mobile underwater acoustic communication / FDM / piecewise-LFM / low-SNR
关键字 : 移动水声通信 / 频分复用 / 分段式线性调频 / 低信噪比
© 2019 Journal of Northwestern Polytechnical University. All rights reserved.
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