Compensation of nonlinear distortion in OFDM systems with high power amplifier

摘要

Non-linear characteristic of an amplifier in an OFDM system that uses a high power amplifier receives data reproduction when the bit error rate: there is a problem that increase (BER bit error rate). The present invention relates to a compensation method for reducing the effect of this non-linear characteristic on the received signal. Aqueous phase of a received signal in a linear compensation, and the reception terminal of the high output amplifier through the output back-off (OBO) pre-distorter (predistorter) of the method and transmitter for operating the amplifier in a manner at a relatively linear portion for compensating a distortion degree coming three compensation technique of the reverse rotation (de-rotation) (constellation) are used separately. In the present invention, it is developing an effective compensation method for improving the bit error rate by using, as a mix of the three methods as appropriate.