Author : Yanjie Peng
Publisher :
ISBN 13 :
Total Pages : 220 pages
Book Rating : 4.:/5 (823 download)
Book Synopsis Design and Implementation of Belief Propagation Symbol Detectors for Wireless Intersymbol Interference Channels by : Yanjie Peng
Download or read book Design and Implementation of Belief Propagation Symbol Detectors for Wireless Intersymbol Interference Channels written by Yanjie Peng and published by . This book was released on 2012 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: In modern wireless communication systems, intersymbol interference (ISI) introduced by frequency selective fading is one of the major impairments to reliable data communication. In ISI channels, the receiver observes the superposition of multiple delayed reflections of the transmitted signal, which will result errors in the decision device. As the data rate increases, the effect of ISI becomes severe. To combat ISI, equalization is usually required for symbol detectors. The optimal maximum-likelihood sequence estimation (MLSE) based on the Viterbi algorithm (VA) may be used to estimate the transmitted sequence in the presence of the ISI. However, the computational complexity of the MLSE increases exponentially with the length of the channel impulse response (CIR). Even in channels which do not exhibit significant time dispersion, the length of the CIR will effectively increase as the sampling rate goes higher. Thus the optimal MLSE is impractical to implement in the majority of practical wireless applications. This dissertation is devoted to exploring practically implementable symbol detectors with near-optimal performance in wireless ISI channels.