A 7.4-mW 200-MS/s Wideband Spectrum Sensing Digital Baseband Processor for Cognitive Radios Tsung-Han Y u, Student Member , IEEE, Chia-Hsiang Y ang,M e m b e r ,I EEE, Danijela Čabrić, Member , IEEE,a n d Dejan Marković, Member , IEEE

Abstract

A digital baseband cognitive radio spectrum sensing processor with 200-kHz resolution over 200-MHz bandwidth is in- tegrated in 1.64 mm in 65-nm CMOS. The processor uses adap- tive channel-speci fic threshold and sensing time to achieve detec- tion probability 0.9 and false-alarm probability 0.1 for 5-dB SNR and adjacent-band interferers of 30-dB INR within a 50-ms sensing time. The chip power an d area are minimized by jointly considering algorithm, architecture, and circuit parameters. The chip dissipates 7.4 mW for a 200-MHz sensing bandwidth, which is a 22 reduction in power per sensing bandwidth compared with prior work.