Passive Switched Capacitor RF Front Ends for Spectrum Sensing in Cognitive Radios

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="947373.fig.0020a" src="https://static.hindawi.com/articles/ijap/volume-2014/947373/figures/947373.fig.0020a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Example on-bin input</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="947373.fig.0020b" src="https://static.hindawi.com/articles/ijap/volume-2014/947373/figures/947373.fig.0020b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Output (rotation due to asynchronous triggering)</td></tr></table></td></tr></table>

<table>Time-domain latched CRAFT outputs and single-bin input, with fractional triggering rate for periodic phase rotation of output.</table>

International Journal of Antennas and Propagation

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Figure 20

Figure 20: Passive Switched Capacitor RF Front Ends for Spectrum Sensing in Cognitive Radios 