Automatic reduction of intermodulation products in high power li

Details Automatic reduction of intermodulation products in high power li Automatic reduction of intermodulation products in high power li

1985-01-25

1986-04-01

Mullins, James B.

Amplifiers

Hum or noise or distortion bucking introduced into signal...

330 52, H03F 126

Patent

active

045801053

ABSTRACT:
A distortion simulating pilot is injected at the input of an amplifier which uses feed forward distortion correction. The magnitude of the pilot signal in the amplifier output is used to control a decreasing step size circuit algorithm for adjusting the gain and phase of the feed forward distortion signal to eliminate substantially the pilot signal and the distortion introduced by the amplifier.

REFERENCES:
patent: 3675138 (1972-07-01), Standing
patent: 3886470 (1975-05-01), O'Neil et al.
patent: 3922617 (1975-11-01), Denniston et al.
patent: 4276514 (1981-06-01), Huang
patent: 4291277 (1981-09-01), Davis et al.
patent: 4414686 (1983-11-01), Lenz
"Adaptive Linearization of Power Amplifiers in Digital Radio Systems", By A. A. M. Saleh et al., Bell System Technical Journal, vol. 62, No. 4, Apr. 1983, pp. 1019-1033.
"Correction of Non-Linearity in Low and Medium Power Transmitters and Transposers" by C. Cluniat, Review Technique Thomson-CSF, vol. 10, No. 2, Jun. 1978, pp. 1-46.

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