但是OFDM信号有高的峰值平均功率比，当它通过高功率放大器时会导致非线性失真，从而使得系统的性能下降。

But the OFDM signal has a large PAPR, which results in the significant nonlinear distortion when it passes through a HPA (high power amplifier), thereby the performances of the system descend.

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为充分保证信号的波形不失真，你的采样频率应比Nyquist频率高出许多，通常是你信号最高频率的5到10倍。

To adequately preserve the shape of your signal, you should sample at a much higher rate than the Nyquist frequency, generally at least 5 or 10 times the maximum frequency component of your signal.

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当原始数据的信噪比较低时， 阈值的选择受大振幅噪音的影响，使压缩比略有下降，但仍然能够保持信号基本不失真。

The results showed that, enen with compression ratio of more than 200, the data could be reconstracted with out significant loss of useful signals by the method.

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