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... [9]. 3.1. Approximation For the unit-energy second-derivative Gaussian pulse 5 , � £¦¥¨§�© � ��� � � � � � � � � � � £ � � � £¦¥¤� � � ��� §�§ ��� � � ��£ � � � £¦¥���� � §�§ � ����� it can be shown =-=[11]-=- that for large � � , the autocorrelation (11) can be approximated by � ��� � �s���s� � ¢ ��� � ��� where, for � � © � � � � � � � § ����� ��� ����� § ����� � ��� � � (14) £ � � � § £�¤ £ ����� ��� ��...

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...es of normalized scale spread γmax as solid lines in Fig. 2. γo We assume a ring-of-scatterers model such that the scattering function Ψ(a,τ) is flat across lag τ and has a “bathtub” shape in scale a =-=[9]-=-. The dashed lines in Fig. 2 correspond to damped zeroth-order Bessel functions of the first kind J0�4π γmax γmax − j�e γo γo j , which closely approximate the autocorrelation sequence of a wideband c...

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...unction characterization forslinear time variant (LTV) systems and CWT isspresented. The proportionality of the widebandsdensity function to continuous wavelet transform issalso addressed in [11]. In =-=[32]-=- Marggetts consideredsthe effect of mobility on a wideband direct sequencesspread spectrum communication system and study asjoint scale-lag diversity technique in mobileswideband systems.sIn this pape...