Open Access

Novel Radio Architectures for UWB, 60 GHz, and Cognitive Wireless Systems

  • Danijela Cabric1Email author,
  • Mike SW Chen1,
  • David A Sobel1,
  • Stanley Wang1,
  • Jing Yang1 and
  • Robert W Brodersen1
EURASIP Journal on Wireless Communications and Networking20062006:017957

DOI: 10.1155/WCN/2006/17957

Received: 18 October 2005

Accepted: 19 January 2006

Published: 19 March 2006

Abstract

There are several new radio systems which exploit novel strategies being made possible by the regulatory agencies to increase the availability of spectrum for wireless applications. Three of these that will be discussed are ultra-wideband (UWB), 60 GHz, and cognitive radios. The UWB approach attempts to share the spectrum with higher-priority users by transmitting at power levels that are so low that they do not cause interference. On the other hand, cognitive radios attempt to share spectra by introducing a spectrum sensing function, so that they are able to transmit in unused portions at a given time, place, and frequency. Another approach is to exploit the advances in CMOS technology to operate in frequency bands in the millimeter-wave region. 60 GHz operation is particularly attractive because of the 7 GHz of unlicensed spectrum that has been made available there. In this paper, we present an overview of novel radio architecture design approaches and address challenges dealing with high-frequencies, wide-bandwidths, and large dynamic-range signals encountered in these future wireless systems.

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Authors’ Affiliations

(1)
Berkeley Wireless Research Center, University of California

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Copyright

© Danijela Cabric et al. 2006

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.