Title :
A dual-mode, correlation-based spectrum sensing receiver for TV white space applications achieving −104dBm sensitivity
Author :
Xiao Xiao ; Nikolic, B.
Author_Institution :
Univ. of California, Berkeley, Berkeley, CA, USA
Abstract :
A spectrum-sensing receiver targeted at the UHF TV band is implemented in 65 nm CMOS. Using known characteristics of the target signal, an efficient architecture employing subsampling downconversion and digital-analog hybrid correlation is implemented to achieve high sensitivity with low power. Fine and coarse detection modes enable both rapid sensing and the detection of very weak signals. For a 6 MHz TV band channel, the system achieves -91 dBm sensitivity with rapid energy detection, -104 dBm sensitivity with correlation, and 84 dB of full-scale dynamic range. The chip consumes only 28 mW of power.
Keywords :
CMOS integrated circuits; UHF integrated circuits; digital-analogue conversion; low-power electronics; radio spectrum management; signal detection; television receivers; TV white space applications; UHF TV band; coarse detection modes; digital-analog hybrid correlation; dual-mode correlation-based spectrum sensing receiver; frequency 6 MHz; rapid energy detection; size 65 nm; subsampling downconversion; target signal characteristics; weak signal detection; Band-pass filters; Baseband; Correlation; Noise; Radio frequency; Sensitivity; Sensors; Cognitive radio; TV white space; correlation; energy detection; sensitivity; spectrum sensing;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium, 2014 IEEE
Conference_Location :
Tampa, FL
Print_ISBN :
978-1-4799-3862-9
DOI :
10.1109/RFIC.2014.6851730
