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...

Introduction: Various systems for intraoral digital radiography have been available as an alternative to film–based radiography. In consideration of several advantages of digital radiography such as less patient absorbed dose, manipulation of im‌age quality and elimination of processing, it has been extensively used in different fields of denti‌stry in recent years. The purpose of this study wa...

This paper describes the coming new generation of communication systems solving interoperability problem between systems operating in different frequency bands and using different standards. These software definable radio (SDR) systems provide all processing in digital form. The paper explains what type of fundamental features the SDR products must possess to function as true software radio (TS...

XM radio service is an emerging satellite digital audio radio service suitable for automotive environment, it offers users high-quality radio programs with better signal coverage by adopting communication satellite broadcasting technology. In order to incorporate XM radio function into a digital car audio system based on the embedded system industry standard ITRON, we analyze both software and ...

A very crucial task of a Wireless Acoustic Sensor Network (WASN) is the wireless transmission of the acoustic signal to a central fusion node. The positioned microphones experience different radio channel qualities, since they may be, e.g., positioned at different distances to the fusion node. The design of the coding and modulation scheme is usually governed by the worst-case radio channel qua...

In recent years, there has been an explosive demand for wireless and portable applications, which resulted in more flexible communication systems that can handle various standards in different environments. In an ideal software radio, the data conversion occurs immediately after the signal received from the receiving antenna.. This paper presents multi-standard reconfigurable modulators, which ...

SMIQ is a signal generator capable of digital and analog modulation for use in the development and production of digital mobile-radio receivers and components as well as for general-purpose measurements (FIG 1). Its frequency range covers all common mobile-radio frequencies and applications in the IF range. The generator comes in four models: SMIQ02, SMIQ03, SMIQ02E and SMIQ03E. The figures 02 ...

adiated emission from electronic equipment, co-located to a digital radio receiver, can affect receiving performance. It is therefore of great importance that this undesired emission be considered in the early design phase of a system containing radio equipment. For this purpose, methods to estimate the performance degradation on digital radio receivers in such environment must be available. Fr...

A setup for electron paramagnetic resonance with narrow band digital detection is described. A low frequency reference tone is added to the radio frequency signal. This reference signal, after digital detection, is used to lock the resonance signal, even in the absence of hardware time locking among the radio frequency generator, the conversion local oscillators, and the sampling stage. Results...