In this paper, the Analog to Digital Converter interface of a pulse based UWB system operating in the presence of strong interferer is specified. The minimum number of quantization bits is determined for interfering signals caused either by in-band or out-of-band service signals and for different front-end realizations. While for an undisturbed UWB communication link 4 quantization bits are sufficient, up to 14bits are necessary for an UWB short range communication distance from 3-15 meters for a 'worst-case' interference scenario. Results show that a non-linear Analog to Digital Converter approach can significantly reduce the number of required bits from 14 to 8bits. Fast Fourier Transformation processing methods have also been investigated in terms of processing load and influence on receiver sensitivity. We show that, with a moderate 32-points Fast Fourier Transformation resolution that enables simple serial processing, we can implement efficient interference notch filtering with negligible Bit Error Rate degradation of less than 0.5dB at a Bit Error Rate of 10{sup}3.
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