different methods exists for jamming mitigation and we should choose a method based an the jammer type and other parameters. one of the jammers is narrow band fm jammer and we use subspace projection techniques for the suppression of this type of jammer. in subspace projection technique, we estimate the if of signals and construct the subspace vector that is orthogonal to jammer vector by incre...

Nowadays, multimedia services over wireless networks are increasingly popular. With multicast, many mobile stations can join the same video group and share the same radio resource to efficiently increase frequency utilization. However, users may be located at different positions, and so suffer different degrees of path loss and interference, and receive a different signal-to-interference and no...

-Multimedia applications are increasingly seen in wireless service networks. The higher channel rate requirements of certain multimedia services, such as video, places constraints on wireless resources, which must provide high channel rates in the presence of high interference and noise. We propose to increase the channel rate of high rate multimedia users by controlling the effective signal to...

and γ = [ IN + ρH H ]−1 11 , where H is a M × N complex Gaussian matrix with independent entries and M ≥ N . These diagonal entries are related to the “signal to interference and noise ratio” (SINR) in multi-antenna communications. They depend not only on the eigenvalues but also on the corresponding eigenfunction weights, which we are able to evaluate on average constrained on the value of the...

In this paper, we study the Minimum Latency Collection Scheduling (MLCS) problem in Wireless Sensor Networks (WSNs) adopting the two interference models: the graph model and the more realistic physical interference model known as Signal-to-Interference-Noise-Ratio (SINR). The main issue of the MLCS problem is to compute the minimum latency schedule, that is, to compute a schedule with the minim...

A microcell interference model termed the Nakagami m,/m, is introduced in this paper. The desired signal as well as the cochannel interferers are assumed to have Nakagami statistics but with different amounts of fading. A special case of this model is obtained when the desired signal has Nakagami statistics while the cochannel interferers are subject to Rayleigh fading. The probability density ...

In this paper we demonstrate the rate gains achieved by two-tier heterogeneous cellular networks (HetNets) with varying degrees of coordination between macrocell and microcell base stations (BSs). We show that without the presence of coordination, network densification does not provide any gain in the sum rate and rapidly decreases the mean per-user signalto-interference-plus-noise-ratio (SINR)...

Fractional frequency reuse (FFR) is an inter-cell interference coordination scheme that is being actively researched for emerging wireless cellular networks. In this work, we consider hexagonal tessellation based planned FFR deployments, and derive expressions for the coverage probability and normalized average rate for the downlink. In particular, given reuse 1 3 (FR3 ) and reuse 1 (FR1) regio...

AbstmctCochannel interference is one of the main impairments that degrade the performance of a wireless link. Power caintrol and antenna beamforming are two approaches for improving the performance in wireless networks by a p propriately controlling the cochannel interference. Joint o p timal beiimforming and power control scheme has been considered in previous work. It has been shown that the ...