Abstract
In this paper, analysis is made on bit error rate (BER) performance for digital video broadcasting using Turbo coded Orthogonal Frequency Division Multiplexing(OFDM).The aim is to achieve energy efficiency in extremely noise environment channel condition. Turbo coding is one of the most attractive coding techniques since it has been proposed, because it can achieve the error correction capability near Shannon’s limit. Turbo code provides significant coding gain by utilizing two relatively simple constituent convolutional encoders, which are concatenated in parallel through an interleaver. The performance of 64 QAM with turbo encoding technique is verified for various code rates at different bit error rates. The BER performance is strongly influenced by signal to noise ratio. Use of parallel concatenated convolutional codes (PCCC) turbo encoder with interlever and soft decision BCJR decoder provides better performance by randomization. The fading channels considered here are Additive White Gaussian noise (AWGN) along with Rician Fading Channel. Result shows that for Eb/No Value of 20dB, lower code rates are performed better BER performance (10-3) i.e. errors observed are less for lower code rates at 20dB of Eb/No value. The structure of the SIMULINK design is developed for different code rates with Turbo coded OFDM, 64 QAM and the results are analyzed using a BER tool of MATLAB version 2017a.
Published Version
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