The DECT Standard Cipher (DSC) is a proprietary stream cipher used for enciphering payload of DECT transmissions such as cordless telephone calls. The algorithm was kept secret, but a team of cryptologists reverse-engineered it and published a way to reduce the key space when enough known keystreams are available [4]. The attack consists of two phases: At first, the keystreams are analyzed to b...

B.P. 3038 Sfax Tunisia. (e-mail: [email protected]). F. Touati is with Sultan Qaboos University, P.O. Box 33, Muscat 123, Oman. (phone: 968-24142535; fax: 968-24413454; e-mail: touatif@ squ.edu.om). M. Loulou is with the national National School Of Engineering of Sfax, B.P. 3038 Sfax Tunisia. (e-mail: [email protected]). Abstract—A design flow of multi-standard down-conversion CMOS mi...

In this paper, low-IF receiver planning for Digital European Cordless Telephone (DECT) systems operating around 1.9 GHz is described. A low-IF receiver architecture is chosen, since it allows a high degree of integration. Unlike zero-IF receivers, this architecture does not have a DCoffset or self-reception problem. The main features of the DECT system are presented, including the translation f...

The usage of object-oriented methodologies in conjunction with formal description techniques has arisen as a promising way of dealing with the increasing complexity of embedded real-time systems. These methodologies are currently well supported by a set of tools that allow the specification, simulation and validation of the functional aspects of these systems. However, most of these methodologi...

In this paper, a mixer topology selection for a multi-standard high image-reject front-end is presented. The receiver is intended to work for Digital Enhanced Cordless Telephone (DECT) systems (at 1.9 GHz and 2.4 GHz) and for Bluetooth (at 2.4 GHz). It will be implemented in 0 18 μm CMOS technology. A double-quadrature low-IF architecture is employed because it can provide a high image rejectio...

BACKGROUND We evaluated if exposure to RF-EMF was associated with reported quality of sleep in 2,361 children, aged 7 years. METHODS This study was embedded in the Amsterdam Born Children and their Development (ABCD) birth cohort study. When children were about five years old, school and residential exposure to RF-EMF from base stations was assessed with a geospatial model (NISMap) and from i...

Future wireless networks will enable people on the move to communicate with anyone, anywhere, at any time, using a range of multimedia services. The exponential growth of cellular telephone and paging systems coupled with the proliferation of laptop and palmtop computers indicate a bright future for such networks, both as stand-alone systems and as part of the larger networking infrastructure. ...

the last decade, the telecommunications industry has experienced explosive growth in wireless technology. This growth, together with recent developments in hardware miniaturization, has opened a new dimension to future wireless networks whose ultimate goal is to provide ubiquitous and universal personal communications without regard to mobility or location [1, 2]. To achieve such an objective, ...

Commencing with the brief history of mobile communications and the portrayal of the concept of wireless multimedia communications, the implications of Shannon's theorems regarding joint source and channel coding are addressed. Following a brief introduction to speech, video and graphical source coding as well as the cellular concept, a short description of the mobile propagation channel is o er...

significantly to 8.0 mU/ml with T3-T4 within normal range. Oedema feet, puffiness of face disappeared and patient became asymptomatic. Again after six months he developed oedema feet and other milder symptoms; T.S.H. was 12.5 mU/ml, T3-0.6 ng/L and T4-5.0 pg/dL Thyroxine dose was raised to 100 ugm . He became asymptomatic in two months under guidance of physician and psychiatrist. In this parti...