Abstract
A distortion compensation method and apparatus for compensating distortion components of a device, such as a power amplifier, wherein should distortion persist in an output of the power amplifier 23 , only distortion components are represented on subtracted results S 40 . These subtracted results S 40 are summed to data written in a random access memory 17 with a signal S 3 as an address, and are again written in a second memory 17 . The data in the random access memory 17 provide an address for a next following third memory 19 to help output data S 44 stored in the third memory 19 . These data S 44 in the third memory are summed by an adder 7 provided in an amplitude distortion correction channel to amplitude correct data in the first memory 6 . The resulting sum data is input to the power amplifier 23 desired to be compensated to contribute to correction of the amplitude distortion.
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