Method and apparatus for wideband predistortion linearization

Details Method and apparatus for wideband predistortion linearization Method and apparatus for wideband predistortion linearization

1997-12-22

2000-06-13

Pascal, Robert

Amplifiers

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

375297, H03F 126

Patent

active

060754117

ABSTRACT:
A predistortion signal is generated which compensates for third order and higher order intermodulation distortion over a wideband. The predistortion signal is applied to an input radio frequency signal, for example a multi-tone radio frequency signal. The predistortion signal is a low order polynomial having adjustable coefficients. The predistortion signal can compensate for intermodulation products produced a nonlinear amplifier, and the polynomial coefficients can be adjusted based on the difference between the amplifier output and the input radio frequency signal.

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Stapleton S.P., et al: "Simulation and Analysis of an Adaptive Predistorter Utilizing a Cimplex Spectral Convolution", IEEE Transactions on Vehicular Technology, vol. No. 4, pp. 387-394, Nov. 1994.

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