Analog integrator and analog-to-digital converter effect on a Multi-Resolution Spectrum Sensing (MRSS) for cognitive radio systems

The proposed multi-resolution spectrum sensing (MRSS) technique is a flexible, low-power, high-speed spectrum-sensing solution for cognitive radio systems. Meanwhile, impairments of analog building blocks may degrade the accuracy of the proposed MRSS performance. In this paper, the effect of non-idealities of an integrator is explored. The dominant pole position is suggested to be less than 20% of the spectrum-sensing resolution- bandwidth. Then, the quantization effect of an analog-to-digital converter (ADC) is addressed when one of a linear amplifier and logarithmic amplifier is present in front of the ADC, respectively. A 7-bit ADC is suggested when a high-dynamic- range logarithmic amplifier is accompanied.