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

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3 Author(s)
R. C. Qiu ; Dept. of Electr. & Comput. Eng., Tennessee Technol. Univ., Cookeville, TN, USA ; J. Q. Zhang ; Nan Guo

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.

Published in:

IEEE Journal on Selected Areas in Communications  (Volume:24 ,  Issue: 4 )