一种预/后选器控制系统的设计及应用

Design and Application of Pre/Post-selector Control System

预/后选器是新一代短波数字跳频电台的关键件,它的重要组成部分是数字调谐跳频滤波器。由于滤波器谐振电路中的电容存在误差,造成谐振电路控制码不是固定的,需要根据实际情况进行调整。为了使预/后选器能够在线更改跳频滤波器的控制码,提出了一种预/后选器控制系统的设计方法,介绍了其设计原理及应用。应用结果表明,该控制系统能缩短生产周期,提高产品可靠性,并对提高增益平坦度、缩小中心频率偏差和跳频步进具有一定实际意义。

The pre/post-selector is a key component of the new generation of shortwave digital frequency hopping radios,and its essential component is the digital tuned frequency hopping filter.Since there are always some errors in the capacitors in the resonant circuits of the filter,the resonant circuit control code is not fixed and needs to be adjusted according to the actual situation.In order to make the pre/post-selector able to change the control code of the frequency hopping filter online,a design of pre/post-selector control system is proposed,and its design principle and application are introduced.Application results show that the proposed control system can shorten the production cycle and improve product reliability,and has practical significance in improving the gain flatness,reducing the center frequency deviation and reducing the frequency hopping step.