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In this paper, we analyse the interference power in a typical wireless cellular network. We provide an analytical approximation for the probability density function of the interference power, which does not depend on the user's position, and which is validated by simulation. The key idea of the approximation results from our observation that the variations of the pathloss between a user and an interfering...
Ultra-wideband (UWB) has been considered a viable and an innovative solution for future short-range high-speed wireless communication systems. One of the big concerns for UWB devices to function properly is the narrow band interference (NBI) issue, which must be carefully studied. For this purpose, the performance of UWB communication system over indoor Lognormal fading channel in the presence of...
In this paper, we present new closed form expressions for lower bounds on the end-to-end outage probability of a dual-hop, non-regenerative cooperative communication system over independent, not necessarily identically distributed, gamma-shadowed Nakagami-m fading channel. More specifically, we obtain new closed form expressions (in terms of Meijer's G function) for the cumulative distribution function...
Optimal component and system design requires knowledge of the statistics underlying the system. To date, the determination of the probability distributions characterizing the multiple access interference in ultra-wide bandwidth wireless systems is an unsolved problem. The statistical characteristics of the multiple access interference in ultra-wide bandwidth wireless systems are studied. Expressions...
Outage probability in wireless networks with random Poisson location of the nodes is studied, including the effects of a broad class of fading processes and of various types of interference cancellation. For all scenarios considered, the total (aggregate) interference power is shown to be dominated by that of the nearest interferer (at the low outage region), which is used as a major performance indicator,...
In this paper, the performance of cooperative networks introduced in the literature is analyzed for asynchronous direct sequence code-division-multiple-access (DS-CDMA) systems in frequency-selective slow fading environment. We show that the full benefits of cooperative diversity cannot be achieved if no multiuser interference suppression is employed at the cooperative end. We consider two scenarios;...
The author presents new analytical approach of the bit error rate (BER) performance for multicode code division multiple access (CDMA) systems equipped with a multipath interference canceler (MPIC) over multipath fading channels. Numerical results obtained from the proposed analytical approach indicate that the performance mismatch between the previous analysis and simulations is generated by the...
In this paper, distributed power allocation schemes are studied for amplify-and-forward (AF) cooperative relay networks, where only partial channel state information (CSI) is available at the source and relays. Aiming at minimizing the total transmit power while providing a target outage probability, a scheme is first investigated in which the source decides transmit power and a relay-forwarding threshold,...
In this paper, we propose a new throughput analysis for IEEE 802.11 distributed coordination function (DCF) considering the real channel conditions and capture effects under arbitrary load conditions employing basic access method. The aggregate throughput of a practical wireless local area (WLAN) strongly depends on the channel conditions. In real radio environment, the received signal power at the...
Wireless reconfigurable networks (WRN) are prone to several routing security attacks such as packet dropping, data integrity, selective forwarding, black holes, and wormholes. In this paper, we introduce an interference and outage probability analysis of the distributed security attack detection and defense method (DDM) for WRN proposed. The accuracy capabilities of the method are analyzed under nearest...
In this paper we describe the effect of imperfections in the radio environment map (REM) information on the performance of cognitive radio (CR) systems. Via simulations we explore the relationship between the required precision of the REM and various channel/system properties. For example, the degree of spatial correlation in the shadow fading is a key factor as is the interference constraint employed...
One of the disadvantages that are associated with orthogonal frequency division multiplexing (OFDM) is high peak to average power ratio (PAPR). In most cases, this high peak signal often forces practical amplifiers to operate in the nonlinear region and causes additional degradation to the system's performance. Since the frequency bandwidth is a scarce resource, it is inevitable that a wireless communication...
This paper presents a new generalized path loss equation that takes in to account both small-scale multipath fading as well as large-scale path loss including lognormal shadowing. The probability density function (pdf) of the signal to interference ratio (SIR) for wireless networks with Nakagami-m channel model is analytically derived using the new path loss equation. We choose the Nakagami-m channel...
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