Owing to the specific characteristics of Unmanned Aerial Vehicles (UAVs), demands and applications increase dramatically for them being deployed in confined or closed space surveying, inspection detection substitute human. However, Global Positioning System (GPS) may lose effectiveness become unavailable due potential signal block interference that operational environment. Under such circumstan...

High-Speed, Low-Power A/D Converter for a Low-Cost UWB Sub-sampling Radio by Shuo-Wei Michael Chen Doctor of Philosophy in Electrical Engineering and Computer Sciences University of California, Berkeley Professor Robert W. Brodersen, Chair Ultra-Wideband (UWB) technology was approved by the FCC in 2002 and has since drawn considerable attention for a variety of applications, including imaging, ...

An energy efficient ultra-wideband (UWB) transmitter based on the novel transmitted reference pulse cluster (TRPC) modulation scheme is presented. The TRPC-UWB transmitter integrates, namely, wideband active baluns, wideband I-Q modulator based up-conversion mixer, and differential to single-ended converter. The integrated circuits of TRPC-UWB front end is designed and implemented in the 130-nm...

Demand for low cost and high data-rate wireless communication systems is increasing. Since the FCC has authorized communication in the 3.1 GHz to 10.6 GHz frequency band, several technologies have been developed to satisfy the communication market. Typically, Orthogonal Frequency Division Multiplexing (OFDM) technique appears to be good candidate for high speed data communication whereas carrie...

Despite the fact ultra-wideband technology has been around for over 30 years, there is a newfound excitement about its potential for communications. In this paper we are specifically focused on a software radio transceiver design for impulse-based UWB with the ability to transmit a raw data rate of 100 Mbps yet encompass the adaptability of a reconfigurable digital receiver. Direct sequence spr...

In present day society where communication technologies are advancing at spiral rate, the need for efficient integrated circuit design to transmit and receive signals at unlicensed frequency spectrum is inevitable. This study tries to shed new light on the latter topic by evaluating the issues associated with the design in advanced CMOS technologies of a critical RF building block, namely a sin...

Ultra-Wideband (UWB) is the promising technology for localization of the objects behind the walls. Recent terrorist activities and law-enforcement situations underscore the need for effective through-wall detection. UWB radar signals has extremely large frequency spectrum and since low frequencies has more penetration capabilities through dielectric materials it is best suitable for Through-the...