CFPI

On the basis of discussing the principles of detecting ultrasonic signals with a confocal Fabry-Perot interferometer ( CFPI), a CFPI was developed successfully. This interferometer has good characteristics, lower cost of production and is easy to operate.

本文在系统地讨论了用共焦Fabry Perot干涉仪探测超声信号的理论基础上，成功地自行设计、制作、组装一台成本较低，综合性能优良，操作方便的共焦Fabry Perot干涉仪。

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The system and its operation principle of an ultrasonic receiver with a confocal Fabry Perot interferometer ( CFPI) were given.

给出了共焦Fabry－Perot干涉仪超声探测系统及其工作原理；

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A cross-frequency permutation and inversion ( CFPI) precoding technique is proposed, which transforms signal via additional degrees of frequency freedom.

通过利用频率自由度进行信号变换，提出一种跨频率置换和求反（CFPI）的预编码技术。

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