中频信号采样与正交相干检波

Sampling of IF Signal and Quadrature Coherent Detector

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。对迄今为止提出的各种方法进行了分析与总结,用统一的观点给予了解释。并在统一指标下比较了它们各自的性能与适用条件。

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. Various proposed methods so far have been analysised and summarized. Their features and application condition are compared under the same index. They are also interpreted using the same point of view.