无人机测控数据链路的机载扩频接收机实现

The realization of airborne spread spectrum receiver about UAV measurement and control data link

通过具体实例介绍了基于无人机测控数据链路的机载扩频接收机的主要功能和实现原理。测控数据链路采用直接序列扩频技术,具备较强的抗干扰、抗截获和保密能力。系统采用一次变频构架,引入相关信号能量控制链路增益保持A/D采样精度,所有的数字信号处理都基于软件无线电,从而使产品具有软件无线电的诸多优点。重点阐述利用软件无线电,在低信噪比情况下,捕获与跟踪在本扩频接收机的实现。

In this paper,the main functions and implementation theory of airborne spread spectrum receiver based on UAV measurement and control data link is introduced through specific examples.Using direct sequence spread spectrum technology,measurement and control data link has strong anti-interference,anti-interception and secrecy.System adopts once frequency architecture,introducing related signal energy to control link gain and maintain A / D sampling accuracy.All digital signal processing based on software radio;so many products have the advantage of software radio.Utilizing software radio,the implementation of capture and tracking in the spread spectrum receiver under the low SNR is focused on.