A 7.4mW 200MS/s wideband spectrum sensing digital baseband processor for cognitive radios

A digital baseband cognitive radio spectrum sensing with channel-specific threshold and sensing time is integrated in 1.64mm
²
in 65nm CMOS. The processor achieves detection probability ≥ 0.9 and false-alarm probability ≤ 0.1 for −5dB SNR within a 50ms sensing time. The chip dissipates 7.4mW for a 200MHz sensing bandwidth. A 22x reduction in power per sensing bandwidth is achieved compared to prior work.