A distortion compensation method and apparatus for compensating distortion components of a device, such as a power amplifier, extremely readily. Should distortion persist in an output of a power amplifier 23, desired to be compensated, only distortion components are represented on subtracted results...http://www.google.com.hk/patents/US20020010567?utm_source=gb-gplus-share專利 US20020010567 - Distortion compensation method and apparatus