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 OFDM Link Performance Analysis under Various Receiver Impairments | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 145279 11 pages doi 2008 145279 Research Article OFDM Link Performance Analysis under Various Receiver Impairments Marco Krondorf and Gerhard Fettweis Vodafone Chair Mobile Communications Systems Technische Universitat Dresden D-01062 Dresden Germany Correspondence should be addressed to Marco Krondorf krondorf@ Received 8 May 2007 Accepted 11 September 2007 Recommended by Hikmet Sari We present a methodology for OFDM link capacity and bit error rate calculation that jointly captures the aggregate effects of various real life receiver imperfections such as carrier frequency offset channel estimation error outdated channel state information due to time selective channel properties and flat receiver I Q imbalance. Since such an analytical analysis is still missing in literature we intend to provide a numerical tool for realistic OFDM performance evaluation that takes into account mobile channel characteristics as well as multiple receiver antenna branches. In our main contribution we derived the probability density function PDF of the received frequency domain signal with respect to the mentioned impairments and use this PDF to numerically calculate both bit error rate and OFDM link capacity. Finally we illustrate which of the mentioned impairments has the most severe impact on OFDM system performance. Copyright 2008 M. Krondorf and G. Fettweis. 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. 1. INTRODUCTION Orthogonal frequency division multiplexing OFDM is a widely applied technique for wireless communications which enables simple one-tap equalization by cyclic prefix insertion. Conversely the sensitivity of OFDM systems to various receiver impairments is higher than
