内嵌高斯白噪声模块的可编程卫星信号模拟源

由于卫星通信的遥测参数和数据格式的多样性,为满足不同卫星测试的要求,需要提供不同的信号源。考虑到成本因素,采用遥测参数和数据格式均可编程卫星信号模拟源。给出了内嵌高斯白噪声模块的可编程卫星信号模拟源的系统组成及工作原理,对其中关键模块——已调副载波生成模块和高斯白噪声生成模块进行了分析讨论,前者采用包括直接数字频率合成方法在内的全数字方法,后者采用延时斐波那契算法和公式法的算法组合。试验结果表明:本方案实现的可编程卫星信号模拟源能够满足多数卫星测试的需要。

A Programmable Satellite Signal Source with Gauss White Noise Embedded

As the telemetry parameters and the data formats of satellite communication are various,the differ- ent signal sources are needed to satisfy the requests of tests for different satellites.Considering the cost factor, the telemetry parameters and data formats for programmable satellite signal source are needed.The system compositions and the working principle of this kind of satellite signal source are introduced.The PSK realiza- tion modulation and the white Gauss noise production modulation,key parts of the system,are analyzed and dis- cussed also.The former one uses digital method including direct digital frequency synthesis,the latter one uses the combination of Lagged-Fibonacci arithmetic and formula method.The test results indicate that this kind of programmable satellite signal source can satisfy most satellites's test requirements.