Title :
Adaptive polar work-function predistortion
Author_Institution :
Spectrian Corp., Sunnyvale, CA, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
Adaptive polar work-function predistortion (WFP) reduces the spectral regrowth of radio frequency power amplifiers such as those used in the telecommunications industry. This paper describes adaptive polar WFP equations and a system implementation. The system description includes an adaptive digital signal processing (DSP) algorithm based on measurement of out-of-band performance. It includes a discussion of the strengths and weaknesses of the DSP algorithm used and presents some current results with wideband modulation signals
Keywords :
adaptive signal processing; circuit simulation; power amplifiers; radiofrequency amplifiers; DSP algorithm; adaptive digital signal processing; adaptive polar work-function predistortion; out-of-band performance; radio frequency power amplifiers; spectral regrowth; wideband modulation signals; Baseband; Broadband amplifiers; Delay; Design optimization; Digital signal processing; High power amplifiers; Linearization techniques; Predistortion; Radio frequency; Radiofrequency amplifiers;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
