Wireless transmitter bandwidth extension using dynamically varying capacitors

Author

Gwynne-Timothy, Thomas ; Bousquet, Jean-Francois

Author_Institution

Dept. of Electr. & Comput. Eng., Dalhousie Univ., Halifax, NS, Canada

fYear

2015

fDate

3-6 May 2015

Firstpage

202

Lastpage

207

Abstract

In this paper a technique to reduce the effect of distortion due to a band-limited front-end is proposed. The technique relies on dynamically varying the filter response at a rate that is a multiple of the symbol rate. Time-variant convolution has been used to determine a strategy to vary the filter capacitance, and two alternative circuit designs relying on switching capacitors is proposed. It has been shown that the distortion error can be reduced to 2% for a system bandwidth 7.8 times greater than the transmit front-end bandwidth.

Keywords

capacitor switching; radio transmitters; switched capacitor filters; band-limited front-end; circuit design; distortion effect reduction; distortion error; dynamically-varying capacitors; filter capacitance; filter response; switching capacitors; symbol rate; system bandwidth; time-variant convolution; transmit front-end bandwidth; wireless transmitter bandwidth extension; Bandwidth; Capacitance; Capacitors; Clocks; Distortion; RLC circuits; Resonant frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering (CCECE), 2015 IEEE 28th Canadian Conference on

Conference_Location

Halifax, NS

ISSN

0840-7789

Print_ISBN

978-1-4799-5827-6

Type

conf

DOI

10.1109/CCECE.2015.7129186

Filename

7129186