Baseband predistortion system for the adaptive linearization of

Details Baseband predistortion system for the adaptive linearization of Baseband predistortion system for the adaptive linearization of

1994-12-14

1996-06-04

Pham, Chi H.

Telecommunications

Transmitter

With feedback of modulated output signal

375297, 330149, H04B 104, H04L 2549

Patent

active

055242863

ABSTRACT:
The invention relates to a baseband predistortion system for the adaptive linearization of power amplifiers and to a radiotransmitter using the predistortion system. It is based upon the updating of two error tables, one for the amplitude and one for the phase, whose content is used for correcting the baseband samples. The content of the tables is obtained by accumulating the difference, suitably weighed, between the sampling entering the predistortion device and the demodulated feedback value.

REFERENCES:
patent: 5123031 (1992-06-01), Kuisma
patent: 5266906 (1993-11-01), Inahashi
Transactions of the Institute of Electronics and Communication Engineers of Japan, Section E., vol. E74, No. 6 Jun. 1991, Tokyo, Japan, pp. 1503-1511, Y. Akaiwa, "Digital Modulation/Demodulation Techniques for Mobile Radio Communic. in Japan".
"Adaptive Linerisation Using Pre-Distortion" by Michael Faulkner et al, IEEE CH 2846-4/90 pp. 35-40.
Nagata, Yoshinori, "Liner Amplification Technique for Digital Mobile Communications", IEEE CH2379-1/89, pp. 159-164.

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