Title :
A 600MHz to 3.4GHz flexible spectrum-sensing receiver with spectrum-adaptive reconfigurable DT filtering
Author :
Lin, David T. ; Chae, Hyungil ; Li, Li ; Flynn, Michael P.
Author_Institution :
Univ. of Michigan, Ann Arbor, MI, USA
Abstract :
A flexible spectrum-sensing receiver in 65nm CMOS consists of a wideband front-end, spectrum-adaptive (SA) filtering, switched-capacitor amplifiers, and a filtering SAR ADC. The SA filter uses a DT spectrum-analyzer and a reconfigurable DT notch filter to detect and suppress large interferers over a 55MHz range. In IEEE 802.15.4 tests, the receiver exceeds sensitivity and interferer rejection requirements. With SA filtering enabled, it achieves ≥+55dB rejection of +25 to +65MHz FM interferers.
Keywords :
CMOS integrated circuits; UHF integrated circuits; adaptive filters; cognitive radio; discrete time filters; field effect MMIC; interference suppression; microwave receivers; radiofrequency interference; CMOS process; DT spectrum-analyzer; IEEE 802.15.4 tests; SA filtering; SAR ADC filtering; discrete-time filtering; flexible spectrum-sensing receiver; frequency 25 MHz to 65 MHz; frequency 600 MHz to 3.4 GHz; interference suppression; interferer rejection; reconfigurable DT notch filter; size 65 nm; spectrum-adaptive filtering; spectrum-adaptive reconfigurable DT filtering; switched-capacitor amplifiers; wideband front-end; Band pass filters; Capacitors; Finite impulse response filter; IIR filters; Passband; Receivers; Discrete-time filter; SAR ADC; software-defined radio; spectrum-sensing; wireless receiver;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium (RFIC), 2012 IEEE
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4673-0413-9
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2012.6242279
