Real-time transceiver implementation for SC-FDE acoustic modems

We have developed a real-time underwater acoustic modem with single-carrier frequency domain equalization (SC-FDE) transmission. Channel estimation operates in the time domain to improve accuracy, and equalization operates in the frequency domain to reduce complexity. The system is implemented on the floating-point OMAPL138 platform. Through optimization in the algorithm and program scheduling, the high data rate and real-time performance of the modem is guaranteed. We have tested the designed system in a lake experiment in June 2016. At a distance of 5 km, the modem achieved real-time raw data rates of 9600 bps with uncoded bit-error rates of 10−3 in the complex environment.

[1]  Hao Zhou,et al.  DSP based receiver implementation for OFDM acoustic modems , 2012, Phys. Commun..

[2]  Cong Wang,et al.  Implementation of underwater acoustic modem based on the OMAP-L138 processor , 2014, 2014 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC).

[3]  Yahong Rosa Zheng,et al.  Bandwidth-efficient frequency-domain equalization for single carrier multiple-input multiple-output underwater acoustic communications. , 2010, The Journal of the Acoustical Society of America.

[4]  Dario Pompili,et al.  Underwater acoustic sensor networks: research challenges , 2005, Ad Hoc Networks.

[5]  Xiaohong Shen,et al.  Single Carrier Frequency Domain Equalizer for Underwater Wireless Communication , 2009, 2009 WRI International Conference on Communications and Mobile Computing.

[6]  Jianguo Huang,et al.  Cyclic prefixed single carrier transmission for underwater acoustic communication , 2007, TENCON 2007 - 2007 IEEE Region 10 Conference.