Ultra-wideband is a technology that can be use at very low energy levels for short-range high bandwidth communications by using a large portion of the radio spectrum. In this paper we is specifically focused on the performance of software radio transceiver design for impulse-based UWB with the ability to transmit a raw data rate of 100 Mbps yet encompasses the adaptability of a reconfigurable d...

This chapter provides an overview of the techniques of radio astronomy. This study began in 1931 with Jansky’s discovery of emission from the cosmos, but the period of rapid progress began fifteen years later. From then to the present, the wavelength range expanded from a few meters to the sub-millimeters, the angular resolution increased from degrees to finer than milli arc seconds and the rec...

This paper proposes a new, self-reconfigurable architecture which can be used to perform Physical Layer functions in Software Radio receivers. The receiver is capable of handling any digital modulation, as long as its symbols belong to a linear, two-dimensional signal space (e.g., M-PSK and M-QAM). It operates by identifying key parameters of the incoming signal (such as symbol rate and constel...

An Ultra Wide Band CMOS Low Noise Amplifier (LNA) design is presented in this paper. Due to low power consumption and extremely high data rates the UWB system is bound to be popular in the end user market. The LNA is the first stage after antenna in an UWB transceiver. The LNA is accountable for providing enough gain to the signal with the bare minimum distortion. In this work we have designed ...

A cognitive radio (CR) node is a radio device capable of operating (transmitting and receiving) over multiple channels. As a result, a network consisting of one or more CR nodes can adapt to varying channel availability in its geographical region by dynamically changing the channel (or channels) that nodes use for communication. We investigate the problem of neighbour discovery in a network con...

The aim of this thesis is to study the feasibility of using feedback immediately at the antenna to improve the out-of-band linearity of receivers. The idea is to reject all signals at the antenna node, except for those in the wanted band, i.e. to effectively create a high-Q RF filter at the input of the receiver. An exception should be made for the desired signal which is available as a zero-IF...

General agreement has been reached recently, that the coherent optimum receivers known from the theory of conventional communication systems are not feasible to implement low-cost and robust UltraWideBand (UWB) Impulse Radio (IR) receivers, especially if they have to offer an extremely low power consumption. Instead, Energy Detector (ED)-based noncoherent receivers have to be used [1]. Unfortun...

We describe a multicore Software-Defined Radio (SDR) architecture for Global Navigation Satellite System (GNSS) receiver implementation. A GNSS receiver picks up very low power signals from multiple satellites and then uses dedicated processing to demodulate and measure the exact timing of these signals from which the user’s position, velocity, and time (PVT) can be estimated. Three GNSS SDR ar...

adiated emission from electronic equipment, co-located to a digital radio receiver, can affect receiving performance. It is therefore of great importance that this undesired emission be considered in the early design phase of a system containing radio equipment. For this purpose, methods to estimate the performance degradation on digital radio receivers in such environment must be available. Fr...

The GPS radio occultation (RO) technique [1] produces measurements in the ionosphere and neutral atmosphere [2] that contribute to monitoring space weather and climate change; and improving operational weather prediction. The high accuracy of RO soundings, traceable to SI standards, makes them ideal climate benchmark observations. For weather applications, RO observations improve the accuracy o...