Title :
Adaptive digital predistortion technique for microwave power amplifiers
Author :
Jeckeln, Ernesto G. ; Ghannouchi, P.M. ; Sawan, Mohamad
Author_Institution :
Dept. of Electr. & Comput. Eng., Ecole Polytech. de Montreal, Que., Canada
Abstract :
The proposed technique is based on the use of algorithms executed by a digital signal processing circuit. A third-order spline function is deduced for application as a signal generator which can provide a predistorted equivalent output for any value or input signal. Samples of the baseband complex equivalent of the signal at the input and output of the amplifier are entered into a lookup table to serve as data for interpolating such a function. This technique affords 45 dB reduction of intermodulation products and requires only a few input and output samples for good compensation of the distortion
Keywords :
adaptive signal processing; digital circuits; intermodulation distortion; interpolation; microwave power amplifiers; signal generators; splines (mathematics); table lookup; adaptive digital predistortion technique; baseband complex equivalent; compensation; input samples; intermodulation products; interpolation; lookup table; microwave power amplifiers; output samples; predistorted equivalent output; signal generator; third-order spline function; Baseband; Circuits; Digital signal processing; Intermodulation distortion; Microwave theory and techniques; Predistortion; Signal generators; Signal processing algorithms; Spline; Table lookup;
Conference_Titel :
Electrical and Computer Engineering, 1995. Canadian Conference on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2766-7
DOI :
10.1109/CCECE.1995.526309
