Enabling cognitive radio (CR) requires revisiting the traditional task of spectrum sensing with specific and demanding requirements in terms of detection performance, real-time processing, and robustness to noise. Unfortunately, conventional spectrum sensing methods do not satisfy these demands. In particular, the Nyquist rate of signals typically sensed by a CR is prohibitively high so that sa...

Software radio has emerged as a focus of both academic research and commercial development for future wireless systems. This paper briefly reviews the foundation concepts of the software radio. It then characterizes the tradeoffs among core software-radio technologies. Object-oriented analysis leads to the definition of the radio reference platform and the related layered object-oriented archit...

power amplifiers (pas) are inherently nonlinear elements and digital predistortion is a highly cost-effective approach to linearize them. although most existing architectures assume that the pa has a memoryless nonlinearity, memory effects of the pas in many applications ,such as wideband code-division multiple access (wcdma) or orthogonal frequency-division multiplexing (ofdm), can no longer b...

With the advancement of technology, use streaming media by petitioners has taken a quantum leap in recent years. The webcasting is now common PSB (public sector broadcasting) across globe. adaptation latest technology and its different program formats, Radio Pakistan planned to best gadgets coming Webcasting increased availability radio communication, anyone who access computer. Broadcasting Co...

In the following paper the perspectives of spatial development of digital broadcasting in Slovenia will be presented. Digital broadcasting will be considered in two main streams – digital audio broadcasting and digital video broadcasting, both in the terrestrial mode. In the field of digital radio, T-DAB frequency block allotments were already coordinated at the Wiesbaden planning conference in...

This paper describes a radio equipment “signature,” a means of comparing different digital radio designs in their sensitivity to multipath fading, and reviews the concept of DFM, dispersive fade margin, as a measure of the expected outage due to selective fading. Since dispersive fade margin accounts for all contributions to sensitivity of a digital radio operating in a frequency-selective fadi...