Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
Power series digital predistorter and distortion compensation control method therefor
A power series digital predistorter and a distortion compensation control method for the power series digital predistorter are capable of adjusting the coefficients of a frequency characteristic compensator at high speed. A controller in the power series digital predistorter collectively sets adjustment amounts for the phases in bands in an N-th order frequency characteristic compensator; collectively sets adjustment amounts for the amplitudes in the bands in the N-th order frequency characteristic compensator; determines whether an index indicating the degree of cancellation of a distortion component generated in a power amplifier satisfies a preset condition; and, if the index does not satisfy the condition, performs control such that the adjustment amounts for the phases and the adjustment amounts for the amplitudes are set again.
NTT DoCoMo, Inc.
H H
H03F H03F
inventional inventional
Junya Yasunori Shoichi
Ohkawara Suzuki Narahashi