Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
Power series digital predistorter and distortion compensation control method thereof
Coefficients W0, W1 and W2 to be used in finding a new quadratic function f2(W) indicating dependence of a distortion component on an coefficient by the least square method are obtained as values that satisfy a relational expression f1(W0)=f1(W2)=f1(W1)+P (where P is a true value) on the basis of a quadratic function f1(W) indicating unupdated distortion component coefficient dependence.
NTT DoCoMo, Inc.
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inventional inventional inventional
Junya Shoichi Yasunori
Ohkawara Narahashi Suzuki