Visible to the public An Improved BICM-ID Receiver for the Time-Varying Underwater Acoustic Communications with DDPSK Modulation

TitleAn Improved BICM-ID Receiver for the Time-Varying Underwater Acoustic Communications with DDPSK Modulation
Publication TypeConference Paper
Year of Publication2020
AuthorsCui, H., Liu, C., Hong, X., Wu, J., Sun, D.
Conference Name2020 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC)
Keywords10.2 dB gain, 7.4 dB gain, acoustic communications, BICM-ID algorithm, composability, DDPSK demodulator, DDPSK modulation, Decoding, Demodulation, differential phase shift keying, Doppler shift, Doppler shifts, double differential phase shift, error statistics, IDS, improved BICM-ID receiver, improved bit-interleaved, interleaved codes, iterative decoding, modulation coding, multipath channels, noise figure 10.2 dB, noise figure 7.4 dB, novel receiver architecture, phase noise, Phase shift keying, pubcrawl, radio receivers, Receivers, resilience, Resiliency, Signal to noise ratio, signal-to-noise ratio loss, SNR loss, spread spectrum communication, underwater acoustic communication, underwater acoustic DSSS communications, Underwater acoustics
AbstractDouble differential phase shift keying(DDPSK) modulation is an efficient method to compensate the Doppler shifts, whereas the phase noise will be amplified which results in the signal-to-noise ratio (SNR) loss. In this paper, we propose a novel receiver architecture for underwater acoustic DSSS communications with Doppler shifts. The proposed method adopts not only the DDPSK modulation to compensate the Doppler shifts, but also the improved bit-interleaved coded modulation with iterative decoding (BICM-ID) algorithm for DDPSK to recover the SNR loss. The improved DDPSK demodulator adopts the multi-symbol estimation to track the channel variation, and an extended trellis diagram is constructed for DDPSK demodulator. Theoretical simulation shows that our system can obtain around 10.2 dB gain over the uncoded performance, and 7.4 dB gain over the hard-decision decoding performance. Besides, the experiment conducted in the Songhua Lake also shows that the proposed receiver can achieve lower BER performance when Doppler shifts exists.
Citation Keycui_improved_2020