High mobility may destroy the orthogonality of subcarriers in OFDM systems, resulting in intercarrier interference (ICI), which may greatly reduce the service quantity of high-speed railway (HSR) wireless communications. This paper focuses on ICI mitigation in the HSR downlinks with distributed transmit antennas. For such a system, its key feature is that the ICIs are caused by multiple carrier...

Energy level performance of three packet delivery schemes in a Wireless Sensor Networks (WSNs) over fading channels is evaluated. Effects of two short term fading such as Rayleigh and Rician on packet delivery schemes are evaluated. Three different information delivery mechanisms are considered using regenerative relays with or without error correction capability. In all the three schemes, mess...

In this paper, we analyse the performance of dense small cell network (SCNs). We derive analytical expressions for both their coverage probability and their area spectral efficiency (ASE) using a path loss model that considers both line-of-sight (LOS) and non-LOS (NLOS) components. Due to the close proximity of small cell base stations (BSs) and user equipments (UEs) in such dense SCNs, we also...

A polarimetric synthetic aperture radar (SAR) forms a complex vector-valued image where each pixel comprises the polarizationdependent reflectivity of a portion of a target or scene. The most common statistical model for this type of image is the zero-mean, circularlysymmetric, multivariate, complex Gaussian model. A logical generalization of this model is a circularly-symmetric, multivariate, ...

This paper reveals a previously-unknown infinite linear combination of Gamma distributions with simple coefficients for the symbol-detection signal-to-noise ratio (SNR) in multiple-input/multiple-output (MIMO) communications employing spatial multiplexing and zero-forcing detection (ZF), whereby the intended (detected) and interfering symbol streams experience correlated Rician and Rayleigh fad...

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although knowing the time of the occurrence of the earthquakes is vital and helpful, unfortunately it is still unpredictable. by the way there is an urgent need to find a method to foresee this catastrophic event. there are a lot of methods for forecasting the time of earthquake occurrence. another method for predicting that is to know probability density function of time interval between earth...

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