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Robust Weighted Non-Coherent Receiver for Impulse Radio UWB PPM Signals

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4 Author(s)
Khan, M.G. ; Dept. of Electr. Eng., Blekinge Inst. of Technol., Karlskrona, Sweden ; Sallberg, B. ; Nordberg, J. ; Claesson, I.

This letter proposes an energy detection based robust weight estimation scheme for pulse-position modulated (PPM) impulse radio ultra-wideband (IR-UWB) signals using weighted non-coherent receiver (WNCR). Conventional data-aided WNCR (DA-WNCR) scheme estimates the weighting coefficients, or channel state information (CSI), using a large number of training symbols over time-varying channels. In contrast, the proposed Robust WNCR (R-WNCR) scheme is non-data-aided (NDA), adaptive and robust to channel variations. The proposed R-WNCR estimates the weighting coefficients adaptively based on the received stochastic data, and the weight estimation process is refined using a decision directed approach.

Published in:

Communications Letters, IEEE  (Volume:15 ,  Issue: 6 )