Doppler tracking and fast compensation for OFDM transmission via non-stationary underwater platforms

作者：Pu, Z.; Wang, W.; Li, Y.; Huang, H.^*

来源：Journal of Intelligent and Fuzzy Systems, 2018, 35(3): 2985-2996.

DOI：10.3233/JIFS-169654

• Underwater acoustic communication
• orthogonal frequency division multiplexing
• time-variant Doppler tracking
• Doppler fast compensation

To overcome disadvantages of conventional Doppler estimation and compensation for non-stationary underwater platforms, a novel algorithm based on joint time-frequency searching is proposed to track and rapidly compensate the time-variant Doppler factor in underwater acoustic OFDM (Orthogonal Frequency Division Multiplexing) communication. The algorithm utilizes the comb pilot's subcarriers combined with frequency-domain resampling to calculate the channel impulse response under different Doppler factors. Then the correct Doppler factor is achieved and eliminated by seeking the sparest channel impulse response, which is accessed using compressed sensing method. Experiment results obtained by Monte Carlo simulation and sea-trial in shallow-water are provided, demonstrating that the new algorithm can effectively track and rapidly compensate the time-variant Doppler factor, thus ensuring the stable underwater acoustic OFDM mobile communication for non-stationary underwater platforms.

• 出版日期2018
• 单位中国科学院声学研究所