Abstract
Maintenance of quality of data is one of the challenges facing in ocean observing communication systems. Underwater acoustic channels are characterized by variable channel (by multipath reflections, Doppler shifts in frequency and acoustic noise in the channel) conditions and variable distances between sensor nodes due to water currents. Reliability is usually achieved by errorless communication. Errors can be reduced by using error-resistant modulation schemes or by implementing error control coding (ECC) schemes. The cheapest of these, in terms of cost and power, is ECC. Hence this project attempts to build such a mechanism for the UWA system of interest. In this chapter, one type of channel coding is described. Algorithms are developed for encoding and decoding of text data. Performance of this code is analyzed in terms of bit error rate for different parameters such as Doppler frequency shift, multipath delays compared with convolution-coded data. A software package is developed in MATLAB over AWGN channel, Rayleigh channel and Rician channel using M-ary FSK modulation scheme.
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Venkata Ratnam, Y., Malleswara Rao, V., Prabhakar Rao, B. (2018). Optimum Error Control Code for Underwater Acoustic Communication. In: Saini, H., Singh, R., Reddy, K. (eds) Innovations in Electronics and Communication Engineering . Lecture Notes in Networks and Systems, vol 7. Springer, Singapore. https://doi.org/10.1007/978-981-10-3812-9_39
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DOI: https://doi.org/10.1007/978-981-10-3812-9_39
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