求翻译：压缩扩张变换主要是对较小幅值信号的功率进行放大，而保持较大幅值信号的功率不变，以增大整个系统的平均功率为代价来达到降低PAPR的目的。是什么意思？

Transform compression expansion is mainly the smaller amplitude signal power amplification, while maintaining a large amplitude signal power unchanged, in order to increase the overall system cost to achieve an average power of the PAPR reduction purposes.

Fourier Transform compression expansion is mainly to a relatively small increase in signal power with zoom value, and maintain a relatively substantial value of signal power remains unchanged, so as to increase the average power throughout the system as the cost to achieve lower PAPR purposes.

The compression expansion transformation mainly is carries on the enlargement to the small peak-to-peak value signal power, but maintains the great peak-to-peak value signal the power to be invariable, take increases the overall system the average power as the price to achieve reduces PAPR the goal.

Transform compression expansion mainly on smaller amplitude of signal power to zoom in, and maintain a relatively large value signal power intact, at the expense of increasing the average power of the entire system to achieve the goal of reducing PAPR.

Transform compression expansion is mainly the smaller amplitude signal power amplification, while maintaining a large amplitude signal power unchanged, in order to increase the overall system cost to achieve an average power of the PAPR reduction purposes.