Context. It has been speculated for many years that some extrasolar planets may emit strong cyclotron emission at low radio frequencies in the range 10−100 MHz. Despite several attempts no such emission has yet been seen. Aims. The hot Jupiter system τ Boötis is one of the nearest (d = 15 pc) exoplanets known to date. The gravitational influence of this massive hot Jupiter (M = 6 Mjup) has lock...

Recently, Cognitive Radio has been proposed as a promising technology to improve spectrum utilization. A highly flexible OFDM system is considered to be a good candidate for the Cognitive Radio baseband processing where individual carriers can be switched off for frequencies occupied by a licensed user. In order to support such an adaptive OFDM system, we propose a Multiprocessor System-on-Chip...

An overview of software radio and reconfigurable radio is given, with a special emphasis on results from EU-funded projects. The state-of-the art in reconfigurable radio is presented, detailing architectures providing reconfigurability for networks and services. The allsoftware approach for reconfigurable network elements and terminals is described. Finally, the Eurecom software radio platform ...

In a composite radio environment, different wireless access technologies can be co-operating components of a combined heterogeneous infrastructure. The exploitation of a wireless system, operating in a composite radio context, requires upgraded service and network management capabilities. This paper presents an integrated management system and gives evidence of its capability of optimising serv...

In simple words, smart antenna is such that it can sense its environment and can adjust its gain in different directions accordingly. They provide a smart solution to the problem of communication traffic overload i.e. they increase the traffic capacity. They also improve the QOS. RF spectrum is a limited resource and is becoming crowded day by day due to the advent of new technologies. The sour...

The increasing demand for wireless communication introduces efficient spectrum utilization challenge. To address this challenge, cognitive radio (CR) is emerged as the key technology; which enables opportunistic access to the spectrum. CR is a form of wireless communication in which a transceiver can intelligently detect which communication channels are in use and which are not, and instantly m...

Providing long-distance non-line-of-sight control for unmanned ground robots has long been recognized as a problem, considering the nature of the required high-bandwidth radio links. In the early 2000s, the DARPA Mobile Autonomous Robot Software (MARS) program funded the Space and Naval Warfare Systems Center (SSC) Pacific to demonstrate a capability for autonomous mobile communication relaying...

Flexibility and choice -The DAB signal is essentially a highly flexible over-air 'data-pipe' that can broadcast a wide range of service types, from purely audio-based to multimedia. Typically, each multiplex can broadcast five or more high-quality audio services plus a number of extra services. The multiplex can be dynamically reconfigured to introduce additional services, temporary or permanen...