Recent attention has been given to Nakagami-0.5 fading channel as a special case of Nakagami-m fading channel with m = 0.5 and as a worst-case (severe) fading scenario. This paper presents a study on the performance analysis of a robust multiuser detector for direct sequencecode division multiple access (DS-CDMA) systems including maximal ratio combining (MRC) receive diversity. A new M-estimat...

Performance analysis of maximal-ratio combining receive diversity scheme over Nakagami-0.5 fading channels and its application to the multiuser detection for direct sequence-code division multiple access systems is presented in this paper. A new M-estimator, which performs well in the heavy-tailed impulsive noise, is proposed to robustify the detector. Further, the performance of Eigen mode tra...

In this paper, the problem of spectrum sensing using energy detection over cascaded Nakagami -m fading channels was addressed where all terminals are considered as vehicles. Closed-form expressions of detection probability were derived based on probability density function method. The validity of theoretical analyses was shown by comparing numerical results with Monte-Carlo simulations. The res...

We here present a general and tractable model for line-of-sight (LOS) scenarios, which is based on the product of two independent and non-identically distributed κ-μ shadowed random variables. Simple closed-form expressions for the probability density function, cumulative distribution function and moment-generating function are derived, which are as tractable as the corresponding expressions de...

Algorithms and software were developed for analysis of B-scan ultrasonic signals acquired from commercial diagnostic ultrasound system. The algorithms process raw ultrasonic signals in backscattered spectrum domain, which is obtained using two time-frequency methods: short-time Fourier and Hilbert-Huang transformations. The signals from selected regions of eye tissues are characterized by param...

Resumo—Este artigo investiga o desempenho de outage de sistemas cooperativos amplifica-e-encaminha (AF) de dois saltos em um ambiente de desvanecimento Nakagami-m limitado por interferência. Mais especificamente, assumindo a presença de múltiplos interferentes Nakagami-m no relay AF e um terminal destino ruidoso, aproximações simples e em forma fechada para a probabilidade de outage fim-a-fim s...

Bit Error Rate (BER) performance of the modified structure of a Digital Phase Locked Loop (DPLL) based system for dealing with Nakagami-m fading with coded and un-coded channel is presented here. The emphasis of the work is the implementation of Bose, Chaudhuri and Hocquenghem (BCH) channel coding and decoding technique. The performance of the DPLL for carrier reception with signal under certai...

The physical meaning of the composite Nakagami-lognormal fading model is not well understood by many researchers using the model. The signal power transfer and transform at the interface between the global lognormal shadowing sub-channels and the local Nakagami multipath sub-channels in the presence of correlation between these diversity sub-channels is rather complex. This is the main reason w...

Rate outage probability is an important performance metric to measure the level of quality of service (QoS) in the Generation (4G) broadband access networks. Thus, in this paper, we calculate a closed form expression of the rate outage probability for a given user in a down-link multi-hop OFDMAbased system encountered as a result of links’ channel variations. The channel random behavior on diff...