Method of selecting signals with spatial-temporal diversity for underwater communication using OFDM technique
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https://doi.org/10.54939/1859-1043.j.mst.82.2022.3-11Keywords:
Underwater Acoustic Communications (UAC); OFDM; Doppler frequency compensation.Abstract
In this paper, we propose a reliable communication solution using space-time diversity technique but using only one transceiver antenna applied to mobile OFDM system in underwater communication environment. In our solution, instead of using multiple receive antennas, the transmitter transmits an OFDM signal N times consecutively. The moving transmitter during sending OFDM frames will creat both spatial and temporal diversity of the received signal. To decode the signal from N received OFDM signal frames, we propose an optimal frame selection method to increase efficiency as well as save decoding time. The simulation and experimental results show that the system can achieve a better SER error rate than the MRC technique applied to N received data frames and the number of calculations in our algorithm is also less than that of combination maximum cases of N frames.
References
[1]. Gerard J. Foschini, "Layered space-time architecture for wireless communications in a fading environment when using multi-element antennas". Bell Labs Technical Journal. 1 (2): 41–59, (1996). DOI: https://doi.org/10.1002/bltj.2015
[2]. H. Esmaiel and D. Jiang, "Review article: Multicarrier communication for underwater acoustic channel," Int. J. Communications, Network and System Sciences, vol. 6, pp. 361-376, (2013). DOI: https://doi.org/10.4236/ijcns.2013.68039
[3]. P. A. van Walree, "Propagation and scattering effects in underwater acoustic communication channels," IEEE Journal of Oceanic Engineering,vol. 38, no. 4, pp. 614-631, (2013). DOI: https://doi.org/10.1109/JOE.2013.2278913
[4]. M. Stojanovic and J. Preisig, "Underwater acoustic communication channels: Propagation models and statistical characterization," IEEE Communications Magazine, vol. 47, no. 1, pp. 84-89, (2009). DOI: https://doi.org/10.1109/MCOM.2009.4752682
[5]. Tran Minh Hai, Saotome Rie, Suzuki Taisuki, Tomohisa Wada, "A Transceiver Architecture for Ultrasonic OFDM with Adaptive Doppler Compensation," International Journal of Information and Electronics Engineering, vol. 4, no. 3, (2014). DOI: https://doi.org/10.23919/OCEANS.2015.7401805
[6]. B. Li, S. Zhou, M. Stojanovic, L. Freitag, and P. Willett, "Non-uniform Doppler compensation for zero-padded OFDM over fast-varying underwater acoustic channels," in OCEANS 2007-Europe. IEEE, pp.1-6, (2007).
[7]. Kahn, Leonard, "Ratio Squarer". Proc. IRE (Corresp.). 42 (11): 1704, (1954). doi:10.1109/JRPROC.1954.274666. DOI: https://doi.org/10.1109/JRPROC.1954.274745
[8]. Quoc Khuong Nguyen, Dinh Hung Do, and Nguyen Van Duc, “Doppler Compensation Method using Carrier Frequency Pilot for OFDM-Based Underwater Acoustic Communication Systems” –Conf ATC-2017- Quy Nhon, Vietnam, (2017).
