Out-of-band compensation for non-linear device

Details Out-of-band compensation for non-linear device Out-of-band compensation for non-linear device

1995-12-29

1998-01-20

Mottola, Steven

Amplifiers

With pilot frequency control means

330149, H03F 366, H03F 126

Patent

active

057105219

ABSTRACT:
A system for substantially eliminating nonlinear distortion, such as intermodulation products, introduced when a signal is processed by a nonlinear device. The system adds an out-of-band signal to an input signal to produce a combined signal having a power that substantially equals a nominal operating point power for a nonlinear device. Preferably, the instantaneous power of the out-of-band signal is adjusted by an automatic gain amplifier. The combined signal is input to the nonlinear device to produce an output. A filter processes the output of the nonlinear device to recover the information content of the original signal after processing by the nonlinear device. For example, if the nonlinear device is a power amplifier, the filtered output is an amplification of the input signal.

REFERENCES:
patent: 5166634 (1992-11-01), Narahashi et al.
EPO, Patent Abstracts of Japan, Application No. 60025625, Publication No. 61186035 published Aug. 19, 1986 of Fijitsu Ltd.

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