高码率多星兼容卫星信号模拟源研究

Research on the high bit rate multi⁃satellite signal analog source

针对海洋卫星地面接收设备难以在网测试的问题,设计了一种高码率多星兼容的卫星模拟源,实现了对卫星地面接收和解调系统进行测试的目的。方案采用了FPGA结合上层控制软件的方法,实现了从1 Mb/s~1.5 Gb/s不同码率下多种海洋观测卫星发送信号的模拟。通过与实际卫星地面设备的联合测试,验证了该方案设计的模拟源达到了预期设计指标,能够显著简化卫星发射前的联调成本,压缩联调时间,有效地提高了卫星地面接收站下行链路的正确性和可靠性。

Aiming at the problem that the marine satellite ground receiving equipment is difficult to test on the network,a high bit rate multi-satellite compatible satellite simulation source which realizes the purpose of testing the satellite ground receiving and demodulation system is designed.By combining the FPGA with the upper-layer control software the proposed scheme realizes the simulation of various ocean observation satellite signals the range of which can set from 1 Mb/s to 1.5 Gb/s.By testing with the actual satellite ground equipment,it is verified that the proposed simulator has reached the expected performance,and effectively improve the correctness and reliability of the downlink of the satellite ground receiving station.