A Hammerstein Diversity Combining Technique
Publish place: International Journal of Information and Communication Technology Research (IJICT، Vol: 2، Issue: 1
Publish Year: 1388
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_ITRC-2-1_006
تاریخ نمایه سازی: 23 فروردین 1401
Abstract:
In wireless communication channels fading phenomenon imposes serious limitations upon the system performance. Diversity combining is a well known fading compensation technique. In this paper we propose a diversity combining technique based on a nonlinear Hammerstein type filter to mitigate the destructive fading effect. In the present work, frequency selective Rayleigh fading channels in presence of additive white gaussian noise are considered and m-ary PAM modulation is employed. We first present a theoretical analysis to justify our proposed system. Then the system performance for different power delay profiles and different m-ary PAM modulations are investigated. Comparison of simulation results based on our proposed technique with the results obtained when linear equalizing filters are employed, shows that our technique leads to a considerably higher BER performance at higher SNRs. We also show that our method has a lower complexity than the linear structure. Also, a relative reliability factor for the system is defined and investigated.
Keywords:
nonlinear diversity combining , Hammerstein filter , nonlinear equalizer , frequency selective fading channel
Authors
Amir Masoud Aminian
Modarres Department of Electrical Engineering Ferdowsi University of Mashhad Mashhad, Iran
Mohammad Molavi-kakhki
Modarres Department of Electrical Engineering Ferdowsi University of Mashhad Mashhad, Iran