in this paper we focus on the tracking performance of incremental adaptive LMS algorithm in an adaptive network. For this reason we consider the unknown weight vector to be a time varying sequence. First we analyze the performance of network in tracking a time varying weight vector and then we explain the estimation of Rayleigh fading channel through a random walk model. Closed form relations a...

In this paper, the diversity reception with correlated Rayleigh fading signals will be investigated . Results will be evaluated by converting two correlated Rayleigh fading signals into another two independent Rayleigh fading signals using transformation matrix. These results show that Optimum transformation matrix F=1 is better than F = 2 / 2 which is the elements of the optimum transformation...

In this paper, system operating margin (SOM) is estimated for vehicular ad-hoc networks in absence and presence of Rayleigh fading. The Ad-hoc IEEE 802.11 model is considered for estimating the signal strength and system operating margin. Rayleigh fading was then simulated and system operating margin are estimated in Rayleigh fading environment for different standard modulation schemes. Keyword...

Cognitive radio is a novel technology that can potentially improve the utilization efficiency of the radio spectrum. Spectrum sensing is the key component of cognitive radio technology. However, detection is compromised when a user experiences shadowing or fading effects. In such cases, user cannot distinguish between an unused band and a deep fade. Thus, cooperative spectrum sensing is propose...

An effort has been made to illustrate the performance of the Rayleigh fading channel models by using Qual net simulator in terms of Throughput and PDR. A scenario has developed here for the Rayleigh fading channels, with various parameter. The parameters such as data rate and speed of nodes play very important role in the performance analysis and design of the mobile ad-hoc network over the mul...

In this paper, a detailed theoretical analysis of fading margin in an asynchronous code division multiple access (A-CDMA) system is discussed. Rayleigh and Rician frequency-selective slowly fading channels are considered. Probability distribution and density functions of the probability of error are derived for Rayleigh and Rician fading channels. The fluctuations in the channel capacity are pr...

The performance of an OFDM system is affected by parameters such as carrier frequency offset and phase noise. In the presence of such parameters the performance of OFDM system degrades. Under Rayleigh fading environment the performance fluctuates depending on the signal strength. In this paper the performance of an OFDM system is studied in the presence of Rayleigh fading channel. Results show ...

New bounds on the probability of bit error are presented for a coded communication system with binary antipodal modulation and soft-decision maximum-likelihood decoding over a correlated Rayleigh-fading channel. The bounds are closed-form expressions in terms of the code’s transfer function; they are illustrated by considering a system using convolutional encoding. A long-standing conjecture re...

This first part of this report describes the research done on outage probability with Weibull fading environment. The desired signal experiences Weibull fading while the interferer signals experiences Rayleigh fading. The resulting expressions for outage probabilities are derived. Attempts at improving a method of approximation for deriving the outage probability are made. Comparisons are made ...

Performance limits of information transfer over a discrete time memoryless Rayleigh fading channel with neither the receiver nor the transmitter knowing the fading coefficients except its statistics is an important problem in information theory. We derive closed form expressions for the mutual information of single input single output (SISO) and multiple input multiple output (MIMO) Rayleigh fa...