Mobile WiMAX is a wireless networking system which provides wireless broadband to fixed and mobile terminals. In this paper, firstly performance evaluation of WiMAX system with channel estimation is discussed. Performance evaluation with channel estimation is used because amplitude and phase shift causes error in wireless channel. Finally, Performance evaluation of WiMAX system using adaptive e...

The outperforming stage of wireless communication system need to be developed for reliable delivery of the information. Every wireless communication system has a major influence by the information transferring media (channel). The behavior of wireless channel is quite varying in nature so that the predictions of noises disturbing signals is very crucial task. So the estimation of channel play a...

In this paper, a wireless channel is viewed as a heterogeneous network in the time domain, and an adaptive video transmission scheme for H.264 scalable video over wireless channels modeled as a finite-state Markov chain processes is presented. In order to investigate the robustness of adaptive video transmission for H.264 scalable video over wireless channels, statistical channel models can be ...

In this paper, we propose a model to simulate a wireless fading channel based on Nakagami-m distribution with m>1. The Nakagami-m fading channel is the most generalized distribution as it can generate one-sided Gaussian distribution, Rayleigh distribution and Rician distribution for m equals to 0.5, 1 and >1 respectively. In this work we have proposed a method to generate a wireless fading chan...

Jamming is an effective denial-of-service (DoS) attack in wireless networks due to the open nature of radio propagation. In Jamming attack, the attacker purposely emits radio signals to corrupt the ongoing communication between the legitimate transmitter and receiver. Channel hopping is a feasible link-layer method for preventing jamming attack in wireless communications. In this paper, we prop...

This is a tutorial article presenting comparison between single input single output and multi input multi output wireless channel. We have compared Shannon ergodic capacity of SISO link and its different realizations with MIMO wireless channel. It is shown that wireless channel capacity increases linearly with the increase of multiple antennas both at transmitter and receiver. MIMO wireless lin...

Wireless packet scheduling schemes provide the means to achieve service differentiation for wireless users with diverse quality-of-service (QoS) demands. These schemes are often designed to account for the dynamics of the wireless channel, so that a user that is likely to experience deep fade defers his transmission until the channel conditions improve. The vacant transmission slot is then give...

Because of broadband wireless systems benefit from accurate channel characterization, there is growing interest in broadband wireless multiple-input multiple-output (MIMO) channel models. While coding and signal processing are key elements to successful implementation of a MIMO system, the communication channel representing a major component that determines system performance. This paper will f...

In this paper, we propose an analytical cross-layer model for a Transmission Control Protocol (TCP) connection running over a covariance-stationary wireless channel with a completely reliable Automatic Repeat reQuest scheme combined with Forward Error Correction (FEC) coding. Since backbone networks today are highly overprovisioned, we assume that the wireless channel is the only one bottleneck...