Detection of physics-based ultra-wideband signals using generalized RAKE with multiuser detection (MUD) and time-reversal mirror

Authors:
R. C. Qiu;J. Q. Zhang;Nan Guo
Affiliations:
Dept. of Electr. & Comput. Eng., Tennessee Technol. Univ., Cookeville, TN, USA;-;-
Venue:
IEEE Journal on Selected Areas in Communications - Part 1
Year:
2006

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Abstract

This paper first introduces per-path pulse distortion in multiuser detection for ultra-wideband communications. A new generalized RAKE structure that estimates and compensates for the pulse distortion is used. An finite-impulse response filter representation of the per-path impulse response is used and estimated. The new structure greatly improves the system performance. With four users considered in our simulations in a high-rise building environment, it is found that the average performance of the generalized RAKE using minimum mean-square error (MMSE) detection is improved over the conventional RAKE by 1.8 dB. Both synchronous and asynchronous transmission schemes for decorrelating detector and MMSE detector are considered.