The role of firmware and digital signal processing in radio transceiver design has increased to meet the global coverage requirement and to cover extra features in the mobile telephony. The Software-Defined Radio (SDR) is the practical approach for this. The paper reviews the SDR concepts, the benefits, the design steps involved in SDR, some emerging concepts, technological solutions and challe...

Software radio or software defined radio (SDR) is a quite attractive field of research in terms of theoretical crossover research themes between radio engineering and computer science in academia as well as new multi-standard or all-purpose radio system products in industry [1], [2]. In order to promote research and development in a field of SDR this paper briefly introduces some prospective as...

This paper describes the 1998 TREC-7 Spoken Document Retrieval (SDR) Track which implemented an evaluation of retrieval of broadcast news excerpts using a combination of automatic speech recognition and information retrieval technologies. The motivations behind the SDR Track and background regarding its development and implementation are discussed. The SDR evaluation collection and topics are d...

This paper describes the 1998 TREC-7 Spoken Document Retrieval (SDR) Track which implemented an evaluation of retrieval of broadcast news excerpts using a combination of automatic speech recognition and information retrieval technologies. The motivations behind the SDR Track and background regarding its development and implementation are discussed. The SDR evaluation collection and topics are d...

Currently, most Software Defined Radio (SDR) related products and researches focus on analog communication and voice transmission. In this paper, we propose a SDR platform with digital data communication capability. This platform consists of Field Programmable Gate Array (FPGA) based radio hardware and open source SDR software modules. The main features include: 1) Radio Spectrum Sensing; 2) Re...

This paper describes a spoken document retrieval (SDR) system for British and North American Broadcast News. The system is based on a connectionist large vocabulary speech recognizer and a probabilistic information retrieval system. We discuss the development of a realtime Broadcast News speech recognizer, and its integration into an SDR system. Two advances were made for this task: automatic s...

Our research analyzes security policy enforcement issues inherent to handheld Software Defined Radio (SDR) devices. We have developed an abstraction for Dynamic Policy Enforcement (DPE) for a SDR system which consists of three distinct modules that monitor changes in external conditions, validate system configuration based on those conditions and a given policy, and implement changes to ensure ...

Cognitive radio is based on Software Defined Radio (SDR) technology. The commercial success of smart radio applications and cognitive radio networks will be very dependent on cost, performance, and power consumption of SDR hardware platforms. SDR hardware is now available, but many issues have yet to be studied. In this chapter, the authors detail the constraints imposed by recent radio protoco...

Many therapies using mesenchymal stem cells (MSC) rely on their ability to produce and release paracrine signals with chemotactic and pro-angiogenic activity. These characteristics, however, are mostly studied under standard in vitro culture conditions. In contrast, various novel cell-based therapies imply pre-seeding MSC into bio-artificial scaffolds. Here we describe human bone marrow-derived...

We compared the effects of streptozotocin (STZ) treatment on serum cholesterol and lipoprotein levels in spontaneously hyperlipidemic rats (HLR), a hereditary hyperlipidemic model animal, with those in Sprague-Dawley rats (SDR). The body weight of control SDR and HLR were increased continuously for 30 days. Both SDR and HLR lost their body weight after STZ administration. Glucose levels of SDR ...