Cognitive Radio (CR) is an embryonic technology which able to increase the spectrum utilization by allowing the CR users to carry unused radio spectrum from primary licensed users or share the spectrum with the primary users without causing the inference by spectrum sensing method. This method is used for sensing the used spectrum, and we focus on the performance of CR users based on spectrum s...

As the generation grown up, designing of the wireless communication system towards providing best performance by the services such as high speed of data delivery, high capacity and high bit rate. MC-CDMA (Multi CarrierCode Division Multiple Access) is a desired technique for such cases, MC-CDMA gives best results by the combination of OFDM (Orthogonal Frequency Division Multiplexing) and CDMA (...

Developments in Medical imaging systems which are providing the anatomical and physiological details of the patients made the diagnosis simple day by day. But every medical imaging modality suffers from some sort of noise. Noise in medical images will decrease the contrast in the image, due to this effect low contrast lesions may not be detected in the diagnostic phase. So the removal of noise ...

Several popular classification algorithms used to segment magnetic resonance brain images assume that the image intensities, or log-transformed intensities, satisfy a finite Gaussian mixture model. In these methods, the parameters of the mixture model are estimated and the posterior probabilities for each tissue class are used directly as soft segmentations or combined to form a hard segmentati...

This analysis extends to Rician fading our earlier studies for Rayleigh fading of maximal-ratio eigencombining (MREC) — also known as eigenbeamforming — vs. maximal-ratio combining (MRC) and statistical beamforming (BF), for single-input multiple-output (SIMO) wireless systems. MREC is a superset of BF and MRC. Given instantaneous channel state information (ICSI), which is the channel gain vect...

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