• Paritosh Sharma

An investigation on κ-μ shadowed fading model for space frequency block coding (SFBC) orthogonal frequency division multiplexing (OFDM) system are presented. The model is opted to reduce the losses that occurs in the signals, and improve the strength of the signals mainly in the aquatic environment. This model shows a higher efficiency in the underwater communication channels. In this paper, the exact and approximate expressions of average bit error rate (ABER) for uncoded and SFBC coded OFDM schemes are derived. The derived expressions are presented in the terms of integral form, closed form and infinite series form. Different multipath fading parameter, shadowing parameter, modulation level, transmitting and receiving antennas values are used to illustrate the graph. The graph is between average error bit rate and average SNR. The expressions of ABER for uncoded and SFBC coded OFDM over κ-µ shadowed fading channels are derived using MGF based method. For uncoded OFDM system, both exact and approximate ABER expressions are derived which is presented in infinite series and closed form. Further, the ABER results are compared with previous existing results, as special cases. In last the performance comparison for M-ay modulation schemes is illustrated for different values of modulation levels with κ-μ shadowed fading model parameters.

OFDM, SFBC, Shadowed Fading, ABER, SNR

"Performance Analysis of the SFBC OFDM over Underwater Acoustic Communication Channels", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 3, page no.g429-g434, March-2023, Available :http://www.jetir.org/papers/JETIR2303664.pdf

"Performance Analysis of the SFBC OFDM over Underwater Acoustic Communication Channels", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 3, page no. ppg429-g434, March-2023, Available at : http://www.jetir.org/papers/JETIR2303664.pdf