NDLI: Differential UWB Communications with Digital Multi-Carrier Modulation

Content Provider	IEEE Xplore Digital Library
Author	Xu, H. Yang, L.
Copyright Year	2006
Description	Author affiliation: Dept. of ECE, Florida Univ., Gainesville, FL (Xu, H.; Yang, L.)
Abstract	As a high-rate alternative of impulse radio (IR) ultra-wideband (UWB) communications, analog and digital multi-carrier UWB radios with coherent detection have been introduced. In this paper, we investigate digital multi-carrier differential (MCD) modulation and demodulation schemes for UWB. In our approach, the differential encoding and decoding are carried out across multiple digital carriers in the frequency domain. Hence, channel estimation is bypassed by using neighboring carriers as reference carriers. Compared with the transmitted reference (TR) UWB which relies on delaying and correlating received segments in time domain, our MCD-UWB avoids the need for the analog delay element. In addition, our digital carrier based approach does not incur any spectrum expansion. We also show that our approach enables variable data rates, and remains operational even in the presence of severe inter-frame interference (IFI). In addition, the small spacing between differentially encoded carriers guarantees that the data rate is not limited by the channel coherence bandwidth. Simulations are also carried out to support our theoretical analysis
Starting Page	49
Ending Page	54
File Size	7266455
Page Count	6
File Format	PDF
ISBN	1424401011
DOI	10.1109/ICU.2006.281514
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-09-24
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Infrared detectors Digital modulation Delay effects Ultra wideband communication Channel estimation Interference Decoding Frequency domain analysis Ultra wideband technology Demodulation
Content Type	Text
Resource Type	Article

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