A Study on Pulse-Width-Modulation-Based Power Amplification for Underwater Acoustic OFDM

作者：Zhou, Hao^*; Xu, Xiaoka; Wei, Li; Zhou, Shengli; Cui, Jun-Hong

来源：IEEE Journal of Oceanic Engineering, 2016, 41(3): 656-669.

DOI：10.1109/JOE.2015.2489758

• Orthogonal frequency-division multiplexing (OFDM)
• pilot signal-to-noise ratio (PSNR)
• pulse-width modulation (PWM)
• underwater acoustic communications

In this paper, we investigate the power amplification for underwater acoustic orthogonal frequency-division multiplexing (OFDM) systems. The maximum power delivery (MPD) and the pilot signal-to-noise ratio (PSNR) specific to the OFDM modulation are adopted as design criteria. We study the impact of key parameters associated with the pulse-width modulation (PWM), such as the modulation frequency, the number of quantization bits, and the input clipping threshold, and provide a suitable procedure to determine those parameters to increase the MPD while meeting a certain PSNR constraint. Experimental setup has been established, where the experimental results validate the key findings from the analytical and simulation results.

• 出版日期2016-7