Detection of PPM-UWB random signals
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Cita com:
hdl:2117/1959
Tipus de documentArticle
Data publicació2008-04-23
EditorIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Condicions d'accésAccés obert
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Abstract
This paper focuses on the symbol detection problem of random pulse-position modulation (PPM) ultrawideband (UWB) signals in the absence of interframe interference. Particular attention is devoted to severely time-varying channels where optimal detectors are proposed for both uncorrelated and correlated scattering scenarios. This is done by assuming the received waveforms to be unknown parameters. In UWB communication systems, the assumption of unknown random waveforms is consistent with the fact that the received waveform has very little resemblance with the original transmitted pulse. In order to circumvent this limitation, a conditional approach is presented herein by compressing the likelihood ratio test with the information regarding the second-order moments of the end-to-end channel response. Both full-rank and rank-one detectors are derived. For the reduced complexity rank-one detector, an iterative procedure is presented that maximizes the J-divergence between the hypotheses to be tested. Finally, simulation results are provided to compare the performance of the proposed detectors in different propagation environments.
CitacióLópez Salgado, J.A; Vázquez Grau, G. Detection of PPM-UWB random signals. IEEE Transactions on Signal Processing, 2008, vol. 56, núm. 5, p. 2003-2016.
ISSN1053-587X
Fitxers | Descripció | Mida | Format | Visualitza |
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SPCOM 2008. Lopez-Salcedo.pdf | 1,162Mb | Visualitza/Obre |