Title :
A Low-Power Adaptive Receiver Utilizing Discrete-Time Spectrum-Sensing
Author :
Lin, D.T. ; Hyungil Chae ; Li Li ; Flynn, Michael P.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan at Ann Arbor, Ann Arbor, MI, USA
Abstract :
A flexible spectrum-sensing receiver in 65-nm CMOS consists of a wideband front-end spectrum-adaptive (SA) filtering, switched-capacitor amplifiers, and a filtering specific absorption rate ADC. The SA filter uses a discrete-time (DT) spectrum-analyzer and a reconfigurable DT notch filter to detect and suppress strong interferers over a 55-MHz range. In IEEE 802.15.4 tests, the receiver exceeds sensitivity and interferer rejection requirements. With SA filtering enabled, it achieves ≥ + 55-dB rejection from + 25- to + 65-MHz FM interferers.
Keywords :
CMOS integrated circuits; adaptive filters; amplifiers; analogue-digital conversion; broadband networks; discrete time filters; interference suppression; low-power electronics; notch filters; radio receivers; radio spectrum management; radiofrequency interference; spectral analysers; ADC; CMOS; DT spectrum-analyzer; FM interferer; IEEE 802.15.4 test; SA filtering; absorption rate; discrete-time spectrum-analyzer; discrete-time spectrum-sensing; flexible spectrum-sensing receiver; frequency 55 MHz; interference detection; interference suppression; interferer rejection requirement; low-power adaptive receiver; reconfigurable DT notch filter; sensitivity; size 65 nm; switched-capacitor amplifier; wideband front-end spectrum-adaptive filtering; Bandwidth; Clocks; Finite impulse response filter; Frequency measurement; Passband; Power measurement; Receivers; Discrete-time (DT) filter; spectrum-sensing (SS); wireless receiver;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2013.2243747
