CREST FACTOR REDUCTION APPARATUS AND METHOD FOR MSR SYSTEM TRANSMITTER

摘要

A crest factor reduction apparatus and method for an MSR system transmitter. The apparatus comprises a carrier signal amplitude obtaining module used for obtaining the amplitude of each sampling point signal of a carrier data signal from an MSR signal, a crest factor reduction threshold obtaining module connected with the carrier signal amplitude obtaining module and used for obtaining a crest factor reduction threshold needed by the current MSR system transmitter, and a crest factor reduction processing module connected with the carrier signal amplitude obtaining module and the crest factor reduction threshold obtaining module separately and used for carrying out crest factor reduction processing on the MSR signal according to a signal amplitude input by the carrier signal amplitude obtaining module and a crest factor reduction threshold input by the crest factor reduction threshold obtaining module. By means of embodiments of the present invention, the crest factor reduction threshold can be adjusted adaptively according to multi-standard radio carrier RF bandwidths and the number of each type of standard radio carriers to achieve an optimal peak-to-average ratio of the MSR signal sent out from radio frequency power amplification of a base station, so that the device linearity and efficiency are balanced, and the signal emission quality is improved at the same time.