Abstract
In mobile underwater acoustic (UWA) communications, Doppler spreads have a serious disturbance in communications quality. In this paper, we propose a novel iterative multi-channel double differential phase shift keying (DDPSK) receiver to improve the performance. Meanwhile, we enhance the DDPSK receiver by adopting the multi-symbol estimation to track the channel variation, and an extended trellis diagram is constructed. Furthermore, the multi-channel soft-input soft-output (SISO) based on maximum a posterior (MAP) criterion is proposed. Besides, the effective bit-interleaved coded modulation with iterative decoding (BICM-ID) is applied. Specially, extra gain can be obtained by utilizing spatial diversity with multi-channel receiver. Theoretical simulation shows that the receiver equipped with five arrays can obtain around 5.5 dB gain over the single array.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
