Title :
400–800 MHz spectrum sensing system for cognitive radio
Author :
Chen, Hsiao-Chin ; Chang, Guo-Jin
Abstract :
A 400-800 MHz spectrum sensing system is designed using 0.18 μm CMOS technology for cognitive radio in the UHF TV band. Based on the energy detection method, the system employs a mixer, a DCO, a low-pass filer, a peak detector, a comparator and successive approximation registers to realize the spectrum sensing with 10-bit frequency identification and a resolution of 400 kHz. Using variable - gain function of the LPF, signal strength can be measured and presented with a 5-bit strength indicator.
Keywords :
CMOS integrated circuits; cognitive radio; comparators (circuits); low-pass filters; CMOS technology; DCO; UHF TV band; cognitive radio; comparator; energy detection method; low-pass filter; peak detector; signal strength indicator; spectrum sensing system; successive approximation register; CMOS integrated circuits; Cognitive radio; Gain; Radiation detectors; Signal resolution; Time frequency analysis; ADCs; auto-frequency-control; cognitive radio; receivers; software-defined radio; spectrum sensing;
Conference_Titel :
Faible Tension Faible Consommation (FTFC), 2012 IEEE
Conference_Location :
Paris
Print_ISBN :
978-1-4673-0822-9
DOI :
10.1109/FTFC.2012.6231743
