Title :
A novel adjustable harmonic rejection mixer for cognitive radio
Author :
Shen, Zhaoyang ; Sun, Xuekang ; Guo, Caili
Author_Institution :
Lab. of Network Syst. Archit. & Convergence, Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
Currently, how to achieve a flexible RF front-end of cognitive radio becomes a research hotspot. Cognitive user receives the wideband signal which contains the unwanted signals, and suffers from the issue that LO harmonics will down-convert the unwanted signals to the baseband along with the desired baseband signal. In this paper, we propose a novel Adjustable Harmonic Rejection Mixer (AHRM) which utilizes the nonlinearity of mixer and changes the number of operation-paths to satisfy the variable harmonic rejection requirement of cognitive user. The simulation results show that the harmonic rejection ratio of the AHRM can reach about 300 dB for the required harmonics, and the AHRM uses as few operation-paths as possible to save power consumption.
Keywords :
cognitive radio; mixers (circuits); AHRM; LO harmonics; adjustable harmonic rejection mixer; baseband signal; cognitive radio; flexible RF front-end; power consumption; Baseband; Copper; Harmonic analysis; Mixers; Power harmonic filters; Radio frequency; adjust operation-paths; cognitive radio; down-conversion; harmonic rejection;
Conference_Titel :
Telecommunications (ICT), 2012 19th International Conference on
Conference_Location :
Jounieh
Print_ISBN :
978-1-4673-0745-1
Electronic_ISBN :
978-1-4673-0746-8
DOI :
10.1109/ICTEL.2012.6221237
