Title :
A 0.7 – 2.6 GHz high-linearity rf front-end for cognitive radio spectrum sensing
Author :
Stadius, Kari ; Kaltiokallio, Mikko ; Ollikainen, Jussi ; Pärnänen, Tuomas ; Saari, Ville ; Ryynänen, Jussi
Author_Institution :
Sch. of Sci. & Technol., Dept. of Micro & Nanosci., Aalto Univ. Sch. of Sci. & Technol., Espoo, Finland
Abstract :
A wideband receiver for cognitive radio spectrum sensing unit is presented. The circuit consists of a high-linearity low-noise amplifier, passive mixer, and base-band buffer. IQ signals for the LO are generated using a divide-by-two circuit. Low-noise amplifier includes common-gate common-source combination for simultaneous interference suppression and noise canceling. The receiver operates in the LTE bands at 0.7 - 2.6 GHz, with measured performance of 31-dB gain, 11-dB noise figure, and 2-dBm IIP3 linearity. The circuit is fabricated in 65 nm CMOS technology and it occupies 0.3-mm2 active area.
Keywords :
Long Term Evolution; buffer circuits; cognitive radio; interference suppression; low noise amplifiers; microwave integrated circuits; microwave mixers; radio receivers; radio spectrum management; CMOS technology; LTE; RF front end; base-band buffer; cognitive radio; frequency 0.7 GHz to 2.6 GHz; interference suppression; low noise amplifier; noise canceling; passive mixer; radio spectrum sensing; wideband receiver; Cognitive radio; Gain; Linearity; Mixers; Noise; Receivers; Transistors;
Conference_Titel :
Circuits and Systems (ISCAS), 2011 IEEE International Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4244-9473-6
Electronic_ISBN :
0271-4302
DOI :
10.1109/ISCAS.2011.5938032
