A compressed-sampling time-segmented quadrature analog-to-information converter for wideband rapid detection of up to 6 interferers with adaptive thresholding

A rapid interferer-detector for cognitive radio systems is presented that uses a compressed-sampling time-segmented quadrature analog-to-information converter (TS-QAIC). The TS-QAIC introduces system scalability through adaptive thresholding and time segmentation, while limiting silicon cost and complexity. The TS-QAIC can detect 6 interferers in 2.7-3.7GHz in 10.4μs with 8 physical I/Q branches. The TS-QAIC chip implemented in 65nm CMOS on 0.517mm
²
(active area) consumes 81.2mW from 1.2V.