摘要
对于扩频系统(DSSS)多分量线性调频信号的干扰抑制,介绍单个信号修正Chirp-Fourier的基本原理和基本性质。在此基础上提出了基于修正Chirp-Fourier变换和自适应滤波相结合的多分量LFM信号检测及其抑制方法。修正离散Chirp-Fourier变换可有效地估计出加入多分量LFM信号的各个分量的固定频率和调频率,利用自适应滤波,采用逐次消去的思想,可以很好地对其抑制。仿真结果证明了采用该算法能大大改善有用信号的性能。
For the disturbance and suppressing of multi - component linear frenquency - modulated signal in a Direct Sequence Spread Spectrum （DSSS） system. The basic theory and quality of modified Chirp - Fourier for a signal is introduced. Based on that,the mothod which modified chirp - Fourier and excised adaptive filter together for the detection and suppressing of multi - component LFM signals are put forward. Modified Chirp - Fourier transform is used as an effective technique for the fixing and modulating frequency to estimate each LFM signal in multi - component signal. Adaptive filter can eliminate one after one,and it is good to suppress LFM signal. The simulations show its effectivity.
出处
《现代电子技术》
2009年第10期125-127,132,共4页
Modern Electronics Technique
基金
教育部留学回国人员科研启动基金资助项目(教外司留(2005)546号)
