为满足高性能信号处理技术要求，需要直接对中频信号进行采样来得到正交双路信号。
To satisfy the requirement of high performance signal processing technique, it is demanded to use the direct sampling of IF signal to get quadrature signals.
本文讨论了用直接对带限中频信号进行采样的方法来实现正交相干检波的基本原理，它们在工程实际中有很大的实用价值。
The principles of realizing quadrature coherent detector by direct sampling of bandlimited signal are discussed in this paper. They have great practical value in engineering.
本文讨论了用直接对带限中频信号进行采样的方法来实现正交相干检波的基本原理，它们在工程实际中有很大的实用价值。
The principles of realizing quadrature coherent detector by direct sampling of bandlimited signal are discussed in this paper. They have great practical value in engineering.
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