This thesis considers the statistical analysis of the mobile radio propagation channel and certain functions of it. First, mutual information of the fading multiple-input multiple-output (MIMO) wireless channel is analyzed. Specifically, an approximate distribution of mutual information for Rayleigh fading MIMO channels as well as an upper bound for the ergodic mutual information for Rician fad...

We consider cooperative networks where two singleantenna users assist each other in their transmissions by relaying their partner’s messages. Both users achieve space diversity from sharing their partner’s antenna. The target applications of cooperative networks are systems in which multiple antennas cannot be supported due to size limitation and wireless systems operating in very high frequenc...

In this paper the trade-off between time diversity and the inter-carrier interference (ICI) in an OFDM based MC-CDMA system is discussed. Our approach is to partially shift each spectrum of an OFDM symbol at the transmitter by using different phase shifts in the time domain at different antennas after the OFDM modulation. The summary signal at the receiver has a wider Doppler spectrum as the re...

HERE is a steady rise in the number of mobile system users in the recent times. In order to accommodate more users in a given bandwidth, the spectral efficiency needs to be improved. So, frequency reuse technique is being adopted to increase spectral efficiency [1]. However, frequency reuse causes inter channel and co-channel interference which is more than additive white Gaussian noise of many...

We study asymptotic behavior of the global attractors to the Boussinesq system for Rayleigh-B enard convection at large Prandtl number. In particular, we show that the global attractors to the Boussinesq system for Rayleigh-B enard convection converge to that of the in nite Prandtl number model for convection as the Prandtl number approaches in nity. This o ers partial justi cation of the in ni...

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 concerns two-hop communication over relay-assisted Block fading channel. It is assumed there is not a direct link between the transmitter and the affiliated destination and the communication occurs in two hops through the use of a relay, where the amplify and forward (AF) strategy is employed at this node. In this case, in a Rayleigh block fading channel, the optimal weight function ...

In this paper, we derive bit error performance bounds for turbo codes on Nakagami fading channels with diversity combining. We first derive the average pairwise error probability expressions for turbo codes with maximal ratio combining (MRC), equal gain combining (EGC), and selection combining (SC) on Nakagami fading channels. Using the pairwise error probability expressions and the union bound...

March-April CODED WAVELET OFDM BASED COMMUNICATION SYSTEM FOR RAYLEIGH FADING CHANNEL Tabassum Nawaz Bajwa*, Arsla Khan, Sobia Baig Electrical Engineering Department, COMSATS Institute of Information Technology, Lahore, Pakistan *Corresponding author’s email :{[email protected]} ABSTRACT: Orthogonal frequency division multiplexing (OFDM) technique mitigates the effects of fading channe...