A Software Defined Radio (SDR) is a radio receiver and/or transmitter, whose characteristics can to a large extent be defined by software. Thus, an SDR can receive and/or transmit a wide variety of signals, supporting many different standards. In our research, we currently focus on a demonstrator that is able to receive both Bluetooth and HiperLAN/2. This helps us to identify problems associate...

Software Defined Radio (SDR) and Cognitive Radio (CR) are fast technologies, which can be used to reduce the spectrum shortage problem. The modern software defined radio has been called the heart of a cognitive radio. The applications executing on the radio differentiate a cognitive radio from a software-defined radio. Additional hardware in the form of sensors and actuators increases the more ...

A Software Defined Radio (SDR) is a radio receiver and/or transmitter, whose characteristics can to a large extent be defined by software. Thus, an SDR can receive and/or transmit a wide variety of signals, supporting many different standards. In our research, we currently focus on a demonstrator that is able to receive both Bluetooth and HiperLAN/2. This helps us to identify problems associate...

Software Defined Radio (SDR) requires a reliable, fast and flexible method to chain parametrisable algorithms. Communicating Sequential Processes (CSP) is a design methodology, which offers exactly these properties. This paper explores the idea of using a Java implementation of CSP (JCSP) to model a flexible algorithm chain for Software Defined Radio. JCSP offers the opportunity to distribute a...

Security in a communications system is the attribute that ensures that authorized traffic content is accurately delivered only to intended recipients and that use of system resources is accurately recorded. Introduction of RF links in mobile wireless introduces security considerations beyond those of wireline telephony because interception of the signal cannot be prevented. Implementation of ra...

Configuration of plasma reactors influences the generation of active species including the energized electrons, active radicals and the distribution of active species in reactor, and thus influences the removal efficiency of pollutants. Oxidation efficiency of elemental mercury (Hg) in two different DBD plasma reactors was studied in this paper. One plasma reactor is a surface discharge reactor...

Data distribution and access are major issues in space sciences as they influence the degree of data exploitation. The project “Space-Data Routers” (SDR) has the aim of allowing space agencies, academic institutes and research centres to share space data generated by single or multiple missions, in an efficient, secure and automated manner. The approach of SDR relies on space internetworking – ...

This paper presents a method of document expansion using a side collection for improving the overall performance in retrieving spoken documents using text queries. This method is applied to Chinese spoken document retrieval (SDR) tasks where a series of experiments have been carried out for both monolingual and cross-language SDR systems. In our monolingual retrieval experiments, Cantonese broa...

We present a new methodology for sufficient dimension reduction (SDR). Our methodology derives directly from the formulation of SDR in terms of the conditional independence of the covariate X from the response Y , given the projection of X on the central subspace [cf. J. Amer. Statist. Assoc. 86 (1991) 316–342 and Regression Graphics (1998) Wiley]. We show that this conditional independence ass...

The realization of Software Defined Radio (SDR) requires flexible RF front-end to accommodate multiple standards in different frequency bands. In this review paper, we survey the literature over the period 1995–2011 and discuss the state-of-the-art multiband and wideband LNAs in context of different receiver architectures suitable for SDR. Wideband and multiband LNA designs reported in open lit...