期刊名称：International Journal of Computer Science Issues
印刷版ISSN：1694-0784
电子版ISSN：1694-0814
出版年度：2012
卷号：9
期号：5
出版社：IJCSI Press
摘要：We introduce an analytical approach to evaluate bit error rate (BER) expression is derived for an OFDM system with PSK and QAM encoded image signal are transmitted over AWGN and fading channel models. Different system configurations including time-domain differential modulation, frequency domain differential modulations, delay spread of channels are considered in the exact BER analysis. Both analysis and simulation results are presented for 2PSK, 4QAM and 16QAM. We also investigate the performance of concatenated RS and convolutional code (CC) over AWGN and frequency selective fast fading channels. By concatenating two different codes, we can get the effect of improving the total BER due to benefits of RS codes correcting burst errors while convolutional codes are good for correcting random errors that are caused due to a noisy channel. The resulting scheme is tested for the transmission of images over noisy channels.
关键词：OFDM; Bit Error Rate; Color Image; RS;CC Concatenated Code; FEC; Modulation Technique
