PGA algorithm based on radar echo signal is one method of estimating and correcting phase error in time domain, and its algorithm is simple to use.
基于雷达回波信号的PGA算法是在时域估计和校正系统相位误差的一种方法，算法较简单。
Finally, we use error correcting coding to improve secure algorithm.
最后，利用纠错码理论进一步改进水印算法。
An improved error-correcting algorithm of extended hamming code is given, which can correct the error brought by shock noise without increasing hamming distance.
提出一种改进的扩展海明码纠错算法，在不增大海明码距的情况下，提高海明码的抗干扰能力，实现对冲击噪声引起的突发干扰进行纠错。
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