A 30-MHz–2.4-GHz CMOS Receiver With Integrated RF Filter and Dynamic-Range-Scalable Energy Detector for Cognitive Radio Systems

Autor:	Masaki Kitsunezuka, Hiroshi Kodama, Naoki Oshima, Muneo Fukaishi, Tadashi Maeda, Kazuaki Kunihiro
Rok vydání:	2012
Předmět:	Third-order intercept point Engineering Second-order intercept point business.industry Detector Electrical engineering Noise figure CMOS Electronic engineering Automatic gain control Radio frequency Electrical and Electronic Engineering Wideband business
Zdroj:	IEEE Journal of Solid-State Circuits. 47:1084-1093
ISSN:	1558-173X 0018-9200
DOI:	10.1109/jssc.2012.2185531
Popis:	A 30-MHz-2.4-GHz complementary metal oxide semiconductor (CMOS) receiver with an integrated tunable RF filter and a dynamic-range-scalable energy detector for both white-space and interference-level sensing in cognitive radio systems is reported. The second-order RF filter has only two stacked transistors, and its use, in combination with a subsequent harmonic rejection mixer, results in wideband interference rejection. The energy detector with programmable rectifiers provides dynamic-range (DR) scalability, enabling shared use for white-space/interference-level detection and automatic gain control. A prototype chip, fabricated using 90-nm CMOS technology, achieved over 42-dB harmonic rejection including 7th-order component without any external device, a 67-dB gain, a 5-8-dB noise figure, a -11-dBm in-band third-order intercept point, and a +38-dBm second-order intercept point while drawing only 25-37 mA from a 1.2-V power supply. Multi-resolution DR-scalable spectrum sensing with a 0.2-30-MHz detection bandwidth, -83-dBm minimum sensitivity, and a 29-48-dB DR was demonstrated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0ca1756468a678aefdbff0222998253a https://doi.org/10.1109/jssc.2012.2185531 Zobrazit plný text záznamu