摘要
随着卫星导航系统在军事上的广泛应用,研究导航系统的抗干扰技术已经成为当务之急。文中创新的将跳时技术与现有导航系统相结合,提出基于直扩/跳时(DS/TH)混合扩频的导航卫星系统方案。并分别在4种卫星导航干扰模式下,对此方案进行了抗干扰性能仿真及分析。结果表明在信噪比为-33 dB误码率为10-4时,该方案抗干扰性能比传统导航信号至少提高17 dB,尤其对于抗脉冲干扰,其性能可以改善20 dB左右。
With the satellite navigation systems widely used in the military, the research on anti-jamming techniques of navigation system has become imperative. Based on the DS/TH hybrid spread spectrum, a navigation satellite system is proposed by applying time-hopping to the existing navigation system. Anti-jamming performance of the navigation link is simulated under four typical jamming modes. Simulation results show that when the snr is -33dB and bet is 104, the proposed satellite navigation system can provide more than 17dB anti-jamming performance improvement than conventional scheme. Especially for pulse jamming, the anti-jamming performance can be raised about 20dB.
出处
《电子设计工程》
2012年第6期79-82,共4页
Electronic Design Engineering
关键词
卫星导航
跳时
混合扩频
抗干扰
satellite navigation
time-Hopping
hybrid speed spectrum
anti-jamming
