锁相环的作用是产生本振信号，然后将射频信号下变频 为中频信号(IF, Intermediate Frequency Signals)，或将中频信号上变频为射频信号； 锁相环同时也被应用于时钟恢复电路。
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Then the tracking effects with different loop patameters are simulated and compared. At last,a couple of discriminators are selected and proper loop parameters are designed to track actual GPS intermediate frequency signal,and the tracking results validate the design.
在分析GPS跟踪原理的基础上,对比码环与载波环不同鉴相器的性能,然后在不同环路参数下对跟踪效果进行了仿真比较,最后选择一组鉴相器并设计合适的环路参数,对实际采集的GPS中频信号进行跟踪,跟踪结果验证了设计环路的有效性。
参考来源 - GPS软件接收机跟踪环路设计·2,447,543篇论文数据，部分数据来源于NoteExpress
GPS digitized intermediate frequency signal sampler was used to validate the algorithm of acquisition and tracking of software receiver.
采用GPS中频信号采样器采集实际GPS数据，对搜索和跟踪算法进行了验证。
The non-ideal characteristic of intermediate frequency signal is unfavorable for band-pass sampling and affects the performance of quadrature transform.
研究用一种中频采样和数字信号正交变换理论实现脉冲多普勒雷达信号正交采样的新技术。
Conventional dual up-conversion transmitter usually employs an intermediate frequency (IF) mixer and a radio frequency (RF) mixer to convert baseband user signal to IF and RF in sequence.
传统双上变频发射器通常采用中频(IF)混合器和射频(RF)混合器将基带用户信号依次转换成IF和RF。
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