Then the high frequency subband were processed by the threshold setting method, and the processed signal was reconstructed next.

然后通过设置阈值的方法对高频子带进行处理，接着进行重构。

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The iterative method of frequency estimation based on multi-channels, with high estimation precision, low SNR threshold, is easy to implement with hardware.

多通道迭代的测频算法，具有测频精度高，测频信噪比门限低，具有易于硬件实现的特点。

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In this paper the defects in a new type of high-gain, low-threshold, self-active, self-frequency-doubling NYAB crystal are investigated by optical methods.

本文报告了用光学方法研究高增益、低阈值的新型自激活自倍频的四硼酸铝钇钕(NYAB)晶体的缺陷。

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