基于MSD技术船载测控设备火箭遥测解调方法研究

Research on Rocket Telemetry Signal's Demodulation Method for the Shipborne TT&C Equipment Based on the MSD Technology

针对船载航天测控设备PCM-FM遥测系统中目前采用的调频非相干解调技术进行火箭遥测解调存在的门限效应问题,研究多符号检测技术MSD及其在PCM-FM体制中的应用,说明在接收端采用非相干最大似然序列检测算法可以有效克服门限效应,并且相比于传统的非相干PCM-FM鉴频解调能获得3dB的信道增益。

In order to solve the threshold problem existed in the rocket telemetry signal's demodulation with PCM-FM noncoherent demodulation technology which is applied in the shipborne TT&C equipments' PCM-FM telemetry system,the MSD technology and its application in the PCM-FM system are analyzed.The threshold can be overcome effectively by adopting the noncoherent maximum likelihood detection technology.And at the same time,3dB channel gain can be obtained compaired with the traditional PCM-FM noncoherent demodulation.