Demodulation with dirty templates for UWB impulse radios
Farahmand, S.; Xiliang Luo; Giannakis, G.B.
Global Telecommunications Conference, 2005. GLOBECOM apos;05. IEEE
Volume 4, Issue , 2-2 Dec. 2005 Page(s):5 pp. - 2443
Digital Object Identifier   10.1109/GLOCOM.2005.1578181
Summary:A low-complexity, high performance demodulation algorithm suitable for ultra-wideband impulse radio (UWB-IR) is developed. Capitalizing on the recently proposed acquisition scheme based on dirty templates (TDT), the novel demodulator can cope with unknown timing offsets, unknown time-hopping spreading codes, and unknown multipath channels. Both data-aided (DA) and non-data-aided (NDA) TDT schemes are considered. Performance of the resultant TDT-based demodulator is evaluated and shown to be robust to timing estimation errors. Comparisons are provided with the UWB-RAKE receiver when timing errors are absent. It is asserted that the TDT-based demodulator outperforms the RAKE with limited number of fingers in the medium to high signal-to-noise-ratio (SNR) range. Analytical results are corroborated by simulations

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