Signal predistortion in radio transmitter

Details Signal predistortion in radio transmitter Signal predistortion in radio transmitter

2007-01-25

2010-06-22

Nguyen, Lee (Department: 2618)

Telecommunications

Transmitter

Noise or interference elimination

C330S149000, C375S296000

Reexamination Certificate

active

07742748

ABSTRACT:
A transmission signal to be transmitted from a radio transmitter is predistorted in order to compensate for the signal distortion caused by a power amplifier. The transmission signal and a signal modeling a power supply voltage applied to the power amplifier are compared with distortion properties of the power amplifier using these signals. The distortion information is comprised in an amplitude distortion lookup table and a phase distortion lookup table. Transmission signal and power supply signal values are associated with envelope and phase predistortion information comprised in the respective lookup tables and the envelope and the phase of the transmission signal is predistorted accordingly.

REFERENCES:
patent: 5091919 (1992-02-01), Kuisma
patent: 5123031 (1992-06-01), Kuisma
patent: 6774719 (2004-08-01), Wessel et al.
patent: 2006/0091950 (2006-05-01), Hayase
patent: 1 672 783 (2006-06-01), None

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