The Prony methods are used for exponential fitting. We use a variant of the Prony method for abnormal brain tissue detection in sequences of T 2 weighted magnetic resonance images. Here, MR images are considered to be affected only by Rician noise, and a new wavelet domain bilateral filtering process is implemented to reduce the noise in the images. This filter is a modification of Kazubek's al...

Most of the prior works on designing codebooks for limited feedback systems have not considered presence strong line-of-sight (LOS) channel component. This paper proposes design polar-cap codebook (PCC) multipleinput single-output (MISO) subject to Rician fading channels. The codewords designed PCC are adaptively constructed according instantaneous strength LOS Simulation results show that can ...

The aim of this paper is to analyze the bit error rate (BER) performance of WiMAX physical layer with the implementation of different concatenated channel coding schemes under QAM and 16QAM digital modulations over realistic channel conditions (i.e. noise and multipath fading). In concatenated channel coding, the WiMAX system incorporates CRC-CC (Cyclic Redundancy Check and Convolutional) or RS...

In this thesis, the outage probabilities of correlated sources transmission systems are analyzed. The primary goal of this work is to derive theoretical limit for correlated sources transmission which utilize the source correlation, and to establish theoretical bases for wireless cooperative communications system design utilizing the correlated sources transmission concept. We focus on the prob...

We present a novel statistical model, the generalized-Gaussian-Rician (GG-Rician) distribution, for characterization of synthetic aperture radar (SAR) images. Since accurate models lead to better results in applications such as target tracking, classification, or despeckling, characterizing SAR images various scenes including urban, sea surface, agricultural is essential. The proposed model bas...

INTRODUCTION MR signals are complex numbers where the real and imaginary components are independently Gaussian distributed [1]. The phase of the complex MRI signal is highly sensitive to many experimental factors, e.g., see [1,2], and as such, the magnitude of the complex MR signal is used instead in quantitative studies. Although several techniques have been proposed to correct the phase error...

This letter studies deep learning methods for beam selection in multiuser beamforming with limited feedback. We construct a set of orthogonal random beams and allocate the to users maximize sum rate, based on feedback regarding channel power beams. formulate allocation problem as classification or regression task using neural network (DNN). The results demonstrate that DNN-based achieve higher ...

We present a study on the end-to-end performance of a cooperative diversity system over random fading channels at high signal-to-noise ratio (SNR). The performance criteria we consider are the average symbol error probability (SEP) and outage probability. At high SNR, both average SEP and outage probability can be characterized by two parameters: the diversity and coding gains. We provide analy...

The paper presents a technique to transmit 16QAM signals in mobile radio environments. The conventional method for compensating the multipath fading e ect using pilot symbol assisted modulation (PSAM) is extended, employing not only the pilot symbols but also the previously estimated fading values for evaluating the fading in the current frame. The main results of this paper are the symbol erro...

This article considers the varying K-factor of Rician channels and attempts to derive an upper bound on the K-factor of an indoor Radio Frequency Identification Tag channel based solely on the physical shape of the area in which experiments are conducted. The K-factor is found to be highly dependent upon the physical size and shape of the area in which the channel exists. Ray-tracing is used in...