Patent ID: 7812670

Claim:
A baseband predistorter, comprising: an address generator, for calculating, in accordance with an inputted signal, an address of a phase basic lookup table and an address of an amplitude basic lookup table; a parameter determining unit, for determining, in accordance with scalar quantity information of a feedback signal, a phase translational amount (j), an amplitude translational amount (i), a phase curvature adjustment amount (v) and an amplitude curvature adjustment amount (u); a phase translating unit, for changing the address calculated by the address generator, in accordance with the phase translational amount (j) determined by the parameter determining unit; an amplitude translating unit, for changing the address calculated by the address generator, in accordance with the amplitude translational amount (i) determined by the parameter determining unit; a phase basic lookup table searching section, for searching the phase basic lookup table in accordance with the address changed by the phase translating unit to determine a corresponding phase output of the phase basic lookup table; an amplitude basic lookup table searching section, for searching the amplitude basic lookup table in accordance with the address changed by the amplitude translating unit to determine a corresponding amplitude output of the amplitude basic lookup table; a phase curvature adjusting section, for adjusting the phase output determined by the phase basic lookup table searching section, in accordance with the phase curvature adjustment amount (v) determined by the parameter determining unit; and an amplitude curvature adjusting section, for adjusting the amplitude output determined by the amplitude basic lookup table searching section, in accordance with the amplitude curvature adjustment amount (u) determined by the parameter determining unit.