Multiple Access in Ultra-Wideband Communications Using Multiple Pulses [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 2003.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: PDF-FILE: 9 ; SIZE: 0.3 MBYTES pages
Additional Creators:: Lawrence Livermore National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

Multiple access (MA) in UWB communication is an area of active research. To date several time-division or code-division pulse amplitude modulation (PAM) or pulse position modulation (PPM) schemes have been proposed to separate multiple users in UWB communications. Conventionally, all users employ the same pulse shape and modulate the transmit pulse based on changing amplitude or position. One concern with using the same pulse for all channels is that the multiple access interference (MAI) increases as the number of users increase. This is due to increased cross-correlation between similar pulses of the different channels, raising thus the noise floor in such systems. In this paper we introduce and study the performance of a new MA scheme in the context of multiple orthogonal transmitted-reference (T-R) short duration (nsec) chirp pulses in the presence of multipath and additive white Gaussian noise (AWGN).

Report Numbers:

E 1.99:ucrl-jc-152106
ucrl-jc-152106

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Note:

Published through SciTech Connect.
04/11/2003.
"ucrl-jc-152106"
Wireless Data Communications Onboard Spacecraft-Technology and Applications Workshop, Noordwijk (NL), 04/14/2003--04/16/2003.
Dowla, F; Nekoogar, F.

Funding Information:

W-7405-ENG-48

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