TDRSS高速反向链路多进制扩频抗干扰方案研究

Study of M-ary Orthogonal Spread Spectrum Anti-jamming Scheme for Hight Speed Reverse Chain of TDRSS

分析了跟踪与数据中继卫星系统（trucking and data relay satellite system，TDRSS）高速反向链路数据组2（data group2，DG2）传输带宽和功率受限的特点，针对其在高信息传输速率条件下提高抗干扰能力的需求，提出了多进制扩频抗干扰方案。在研究了多进制扩频技术在高速率传输下抗干扰性能的基础上，结合该技术对高速链路进行建模，并根据模型进行了数字与半实物仿真。仿真结果证明了多进制扩频抗干扰技术能在有限的传输带宽内大大提高高速反向链路抗干扰性能。

The paper analyzes the bandwidth and power limits of high speed reverse chain of trucking and data relay satellite system（TDRSS）. By the needs of anti-jamming ability, it points out the M-ary orthogonal spread spectrum precept of anti-jamming. Based on studying of M-ary orthogonal spread spectrum technology for high speed reverse chain, it builds the high speed reverse chain, then simulates the technology by the hardware-in-the-loop simulating system. It proves that M-ary orthogonal spread spectrum technology could improve capability of anti-jamming for the high speed reverse chain of TDRSS.