Design and implementation of UWB pulse with multiple narrow-band interferences mitigation

Abstract

In this paper, a novel ultra-wideband (UWB) pulse shaping method was presented to generate IR-UWB waveforms which can suppress multiple narrow-band interferences. The proposed method includes two steps. First, to completely satisfy and fully utilize the FCC power spectral density mask, an “interim-pulse” was generated by combining several Gaussian derivative pulses with proper combination coefficients. Then, combining two such “interim-pulses” with a certain delay time, a composite UWB waveform which can mitigate multiple narrowband interferences was eventually generated. To verify the accuracy of the proposed method, a simulation setup was conducted by using MATLAB. Moreover, a low-power, low-cost waveform generator was designed and simulated with Spectra-RF 0.13um CMOS technology. The results indicate that the composite waveform generated by the proposed method can suppress multiple narrow-band interferences by introducing inherent notch frequencies in the power spectral density. Furthermore, the notch frequencies and the number of notches can be adjusted by changing the delay time.