PEAK-AVERAGE-RATIO RESTRAINING METHOD AND DEVICE FOR MULTI-CARRIER ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM

摘要

A peak-average-ratio restraining method for a multi-carrier orthogonal frequency division multiplexing (OFDM) system, pre-generating a lengthened kernel wave, includes: base band frequency domain signals of each carrier are combined into time domain multi-carrier combination channel signals on each orthogonal frequency division multiplexing symbol (S301); clipped noises are extracted from the multi-carrier combination channel signals, and impulse-like signals with a channel length are intercepted from the lengthened kernel wave according to the position of the clipped noises in the multi-carrier combination channel signals (S302); the impulse-like signals are multiplied by the extracted clipped noises to obtain cancellation noises (S303); the cancellation noises are inversely superposed on the delayed multi-carrier combination channel signals to carrying out peak-average-ratio restrain (S304). Also a peak-average-ratio restraining device for OFDM system is provided.