Then digital matched filter (DMF), which is used to synchronize spread spectrum code, especially the multi-rate sampling in DMF is studied.

然后探讨了用于扩频码同步的数字匹配滤波器（DMF），着重分析了DMF的多倍码速率采样问题；

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Furthermore, matched software of the image sampling system is presented.

另外，本文编写了配套的图像采集系统应用软件。

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Condition effect is an important source of non-sampling error in continuous surveys with matched samples.

条件的影响是有匹配样本的连续调查特有的计量误差来源。

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