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

fYear

2012

fDate

23-25 April 2012

Firstpage

1

Lastpage

5

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICTEL.2012.6221237

Filename

6221237