摘要
研究了 DS( direct sequence)扩频系统中基于隐藏马尔可夫模型 HMM( hide Markov models)的干扰抑制技术 ,简要引述了算法原理 ,着重给出了该算法的改进方案和在具体干扰条件下的系统性能仿真。研究表明 ,该算法由于能够对干扰信号进行准确估计 ,因而减小了对有用信号的损伤 ,可以获得更好的抗干扰性能。通过减小复杂度的措施 ,可以用于实际系统 ,这对于应用 DS扩频系统的短波通信和卫星通信 。
The narrow interference rejection based on HMM for DSSS system is studied. Principle of the algorithm was quoted, the adapted means for the algorithm were given and the performance simulations were done for special interference modes. Results showed the algorithm could reduce the loss of useful signal. By reducing implementation complexity the algorithm could be used in practical system. It is meaningful for short wave communication system and satellite communication system with DSSS technology.
出处
《解放军理工大学学报（自然科学版）》
EI
2005年第1期11-15,共5页
Journal of PLA University of Science and Technology(Natural Science Edition)
关键词
直接序列扩频系统
干扰抑制
隐藏马尔可夫模型
性能仿真
DSSS direct sequence spectrum spreading system
interference rejection
HMM
performance simulation
