Patent ID: 8737937

Claim:
A distortion compensation apparatus comprising: an amplifying unit that amplifies an input signal; a plurality of distortion compensation coefficient storage units that store distortion compensation coefficients for compensating for a distortion of the amplifying unit by being associated with two different addresses; a first address generating unit that generates a first address based on a current input signal which is the input signal to be currently input to the amplifying unit; a second address generating unit that generates a second address different from the first address based on a previous input signal which is the input signal to be previously input to the amplifying unit; a distortion compensating unit that obtains the distortion compensation coefficient corresponding to a combination of the first and second addresses from each of the distortion compensation coefficient storage units and performs a pre-distortion processing for the current input signal to be input to the amplifying unit using the obtained distortion compensation coefficient; a bandwidth obtaining unit that obtains a bandwidth of the current input signal; and an abort instructing unit that instructs the second address generating unit to abort generation of the second address in a case where the bandwidth of the current input signal is equal to or greater than a predetermined threshold value, wherein the distortion compensating unit obtains the distortion compensation coefficient corresponding to the first address from each of the distortion compensation coefficient storage units and performs the pre-distortion processing using the obtained distortion compensation coefficient in a case where the generation of the second address in the second address generating unit is aborted.