In this paper, the performance analysis of an energy detector is exploited over composite multipath/shadowing fading channels, which is modeled by Rayleigh-lognormal (RL) distribution. Based on an approximate channel model which was recently proposed by the author, the RL envelope probability density function (pdf) is approximated by a finite sum of weighted Rayleigh pdfs. Relying on this inter...

This paper presents new envelope PDF's (probability density functions) that describe smallscale, local area fading experienced by narrowband wireless receivers. The paper develops novel PDF's that describe the local area fading of two coherent multipath components in the presence of other diffuse propagating waves. Analytical expressions, graphical analysis, and applicability of the PDF's are p...

The increasing interest in wireless sensor networks can be promptly understood simply by thinking about what they essentially are: a large number of small sensing self-powered nodes which gather information or detect special events and communicate in a wireless fashion, with the end goal of handing their processed data to a base station. Sensing, processing and communication are three key eleme...

Extensive research has already started on 6G and beyond wireless technologies due to the envisioned new use-cases potential requirements for future networks. Although a plethora of modern physical layer solutions have been introduced in last few decades, it is undeniable that level saturation reached terms available spectrum, adapted modulation/coding accordingly maximum capacity. Within this c...

In this paper, we investigate the advantages of multiple-input multiple-output (MIMO) faster-than-Nyquist (FTN) signaling under a fixed utilized bandwidth and multipath fading channels. We present derivations input-output relationships for MIMO-FTN systems decompose MIMO transmission scheme into spatial spectral precoding procedures. An approximated frequency-domain equalizer (FDE) is introduce...

The destructive impact of fading environments and also bandwidth limitations are two main challenges which communication is dealing with them. These challenges can affect on the growth of wireless communication and even cause reliable communications and high data rate to be prevented. Thus, OFDM (Orthogonal Frequency Division Multiplexing) modulation by using of fast calculation hardwares such ...

The work is related to the use of Self Organizing Map (SOM) which is a type of unsupervised Artificial Neural Network (ANN), as an aid to Maximal Ratio Combining (MRC) in order to improve bit error rate (BER) values of demodulated signals in wireless channels that have both Gaussian and multipath fading characteristics. Among the architectures and algorithms suggested for ANN, the SOM has the s...

The mobile wireless channel a ords inherent diversity to combat the e ects of fading. Existing code division multiple access (CDMA) systems, by virtue of spread-spectrum signaling and RAKE reception, exploit only part of the channel diversity via multipath combination. Moreover, their performance degrades under fast fading commonly encountered in mobile scenarios. In this paper, we develop new ...