Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Bit Error Rate Analysis for an OFDM System with Channel Estimation in a Nonlinear and Frequency-Selective Fading Channel | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2011 Article ID 670637 12 pages doi 2011 670637 Research Article Bit Error Rate Analysis for an OFDM System with Channel Estimation in a Nonlinear and Frequency-Selective Fading Channel Amir Ligata 1 Haris Gacanin 2 3 Fumiyuki Adachi 4 Miha Smolnikar 5 and Mihael Mohorcic5 1IPSA Institute 71000 Sarajevo Bosnia and Herzegovina 2 Alcatel-Lucent Bell . 2018 Antwerpen Belgium 3 Communication Group at Energy and Communication Department IPSA Institute 71000 Sarajevo Bosnia and Herzegovina 4 Department of Electrical and Communication Engineering Graduate School of Engineering Tohoku University Sendai 980-8579 Japan 5 Jozef Stefan Institute 1000 Ljubljana Slovenia Correspondence should be addressed to Amir Ligata Received 27 December 2010 Accepted 21 February 2011 Academic Editor Ibrahim Develi Copyright 2011 Amir Ligata et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Orthogonal frequency division multiplexing OFDM is an effective technique for high-speed digital transmission over time-dispersive channels. However for coherent detection a reliable channel estimation CE is required. OFDM is characterized by its high peak-to-average power ratio PAPR which makes it very sensitive to nonlinear distortions that may affect the channel estimation accuracy leading to a bit error rate BER performance degradation. In this paper we present closed-form BER expression for OFDM with a pilot-assisted CE in a nonlinear and frequency-selective fading channel. We discuss how and to what extent the nonlinear degradation affects the BER performance with the CE based on a time frequency division-multiplexed TDM FDM pilot. The analysis is based on a Gaussian approximation of the nonlinear .
