Minimizing regenerative distortion due to nonlinear amplification in RF repeaters with digital echo cancellation

Author

Braithwaite, R. Neil

Author_Institution

Powerwave Technol., Santa Ana, CA

fYear

2009

fDate

18-22 Jan. 2009

Firstpage

610

Lastpage

613

Abstract

Repeaters with high forward gain and high output power can suffer from echoes due to RF coupling between the input and output antennas, and distortion due to nonlinearities in the output stage. Distortion generated outside of the echo cancellation loop is amplified by the regenerative effect of the feedback loop formed by the RF coupling. This paper proposes a method of minimizing regenerative distortion by including a model of the power amplifier nonlinearity within the digital echo cancellation so that echo cancellation does not increase the linearity requirements of the output power amplifier.

Keywords

echo suppression; power amplifiers; repeaters; RF coupling; RF repeaters; digital echo cancellation; echo cancellation loop; feedback loop; nonlinear amplification; power amplifier nonlinearity; regenerative distortion; Couplings; Echo cancellers; Feedback loop; Linearity; Nonlinear distortion; Power amplifiers; Power generation; Radio frequency; Radiofrequency amplifiers; Repeaters; Repeaters; echo cancellation;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio and Wireless Symposium, 2009. RWS '09. IEEE

Conference_Location

San Diego, CA

Print_ISBN

978-1-4244-2698-0

Electronic_ISBN

978-1-4244-2699-7

Type

conf

DOI

10.1109/RWS.2009.4957425

Filename

4957425