NDLI: Analog/RF physical layer issues for UWB systems

Content Provider	IEEE Xplore Digital Library
Author	Harjani, R. Harvey, J. Sainati, R.
Copyright Year	2004
Description	Author affiliation: Minnesota Univ., Minneapolis, MN, USA (Harjani, R.; Harvey, J.; Sainati, R.)
Abstract	Ultra-wideband communications systems offer unique challenges and opportunities for RF circuit design. Proper understanding of the trade-offs that system specifications impose upon the circuit designer is essential in optimizing a system for UWB. The defining attribute of UWB is the wide fractional bandwidth of the signal. This wide bandwidth can be achieved in several ways: with carrierless systems, with a wide-bandwidth single carrier spread-spectrum system, with a multi-carrier system such as OFDM, via frequency hopping, or via some combination of these methods. This paper provides detailed impact analysis of wide fractional bandwidth on RF frontend circuits and examines the various tradeoffs. In particular, wide-bandwidth channels limit the instantaneous Q allowable in the signal path. This requires modifications of the traditional narrowband design methods. Some of the issues discussed in this paper include: issues of broadbanding, power impact, fast hopping tradeoffs, power amplifier, and antenna issues.
Sponsorship	VLSI Soc. of India Minist. of Inf. and Commun. Technol., Gov. of India IEEE Electron Devices Soc. IEEE Circuits and Syst. Soc. Tata Consultancy Services Texas Instruments Inc. Nat. Semiconductor Intel Synopsys Cypress Semiconductor Corp. Infineon Technol. Cadence Conexant
Starting Page	941
Ending Page	948
File Size	431130
Page Count	8
File Format	PDF
ISBN	0769520723
DOI	10.1109/ICVD.2004.1261052
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-01-09
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radio frequency Physical layer Bandwidth Ultra wideband technology Circuit synthesis Design optimization Spread spectrum communication OFDM Narrowband Design methodology
Content Type	Text
Resource Type	Article

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