一种小型化星载模拟发射机的设计

Miniaturization Design of Spcaceborne Simulated Transmitter

为了模拟卫星数据广播分发的功能,设计了一种小型化星载模拟发射机。此发射机射频模块核心为AD9364,中频电路的核心为FPGA,具有体积小、重量轻、成本低、性能高以及多普勒频偏模拟功能。设计中采用扩频通信体制结合CCSDS标准下信道编码的方法,以保证下行链路的高可靠、抗干扰、隐秘性及低误码率。研制的发射机通过了测试和联调试验,实测指标和特点均符合设计要求。

A miniaturized spaceborne simulated transmitter is designed to simulate satellite data broadcasting. This transmitter has small volume, light weight, low cost, and high performance and a RF core chip named AD9364 and a MF core chip named FPGA, and the added functionality of Doppler frequency shift simulation. The spread spectrum communication system in combination with channel coding under the CCSDS standard is utilized to ensure high reliability, anti-interference, secret, and low BER of the down link. The developed transmitter passes the function tests and co-operative tests. The measured data and features are quite consistent with the design requirements.