Software-defined radio requires the combination of software-based signal processing and the enabling hardware components. In this paper, we present an overview of the criteria for such platforms and the current state of development and future trends in this area. This paper will also provide details of a high-performance flexible radio platform called the maynooth adaptable radio system (MARS) ...

Ad hoc network is a collection of wireless mobile nodes that dynamically form a temporary network without the use of any existing network infrastructure or centralized administration. A cognitive radio is a radio that can change its transmitter parameters based on interaction with the environment in which it operates. The basic idea of cognitive radio networks is that the unlicensed devices (co...

Radio wave propagation models are extremely important in radio network planning, design as well as in interference planning.All the models predict mean path loss as a function of different variables such as frequency, distance between transmitting and receiving antenna, antenna heights, etc. Radio propagation is essential for emerging technologies with appropriate design, deployment and managem...

In a shadowing-free environment, the improvement introduced by slow frequency-hopping (SFH) on a time-division multiple-access based mobile radio system can be taken into account by redefining the minimum carrier-to-interference ratio. This protection ratio, with SFH, is dependent on the transmission system, channel model, traffic, and frequency reuse parameters. In this paper, the above-mentio...

We briefly explain the concept of cyclic delay diversity (CDD) as a variant of standard conformable delay diversity techniques. Usually being implemented at the transmitter side of an OFDM based system, the application of CDD is recognized at the receiver side only by observing modified channel propagation conditions. Therefore, we analyze the effect of CDD on the channel fading properties obse...

FUTURE TRENDS OF MOBILE AND PERSONAL COMMUNICATIONS (Invited Paper) Theodore S. Rappaport Mobile & Portable Radio Research Group Bradley Department of Electrical Engineering Virginia Tech Blacksburg, VA 24061-0350 email: wireless@vt.edu This tutorial paper provides an overview of the fundamental concepts used in cellular radio communications, and illustrates the likely evolution and growth of t...

WiMax broadband MAN based on the IEEE 802.16d/e standard supports mobile as well as fixed wireless access services. Both types of subscriber data links are characterized by totally different radio conditions such as e.g. propagation, interference rejection capability, terminal antenna gain, pattern and height. This leads to a significant coverage mismatch, different user application throughput ...

—Cognitive radio is regarded as a key technique in the fifth generation communication system. We consider that the popular contents can be cached in cognitive mobile users who compose a cognitive Device-to-Device (D2D) network. Cached

Radio-interferometric ranging is a novel technique that allows for fine-grained node localization in networks of inexpensive COTS nodes. In this paper, we show that the approach can also be applied to precision tracking of mobile sensor nodes. We introduce inTrack, a cooperative tracking system based on radio-interferometry that features high accuracy, long range and low-power operation. The sy...

The new digital radio system DAB (Digital Audio Broadcasting), developed within the Eureka 147 project is a very innovative and universal multimedia broadcast system that has the potential to replace existing AM and FM audio broadcast services in many parts of the world in the near future. DAB employs coded OFDM technology that enables it for mobile reception and makes receivers highly robust a...