用Laguerre滤波器实现自适应跳频同址干扰抵消

摘要

跳频同址干扰具有频率选择性,是典型的长脉冲响应干扰.Laguerre滤波器同时具有FIR和IIR滤波器的优点,对长脉冲响应干扰具有更优的匹配性能和稳定性.在研究跳频同址干扰多径信道特性的基础上,提出采用自适应Laguerre滤波器实现跳频同址干扰抵消,给出自适应干扰抵消器实现算法和自适应Laguerre滤波器最优极点估计方法.仿真结果表明基于Laguerre滤波器的自适应跳频同址干扰抵消器在恒参信道和时变信道中均能获得良好的抵消性能和稳定性,具有很好的实际应用价值.%Frequency-selective frequency hopping (FH) cosite dinterference is a typical long impulse response interfe-rence.The Laguerre structure is a compromise between Finite Impulse Response (FIR) and Infinite Impulse Response (IIR) structure, so the Laguerre filter can match this long impulse response interference effectively and have better sta-bility.Based on the research of the characteristic of the cosite multi-path channel, the new adaptive Laguerre FH cosite interference canceller was proposed,and the algorithm of the canceller and the estimation of the optimum pole of the Laguerre filter were presented.The simulation results show the new canceller can achieve much better performance of cancellation and stability in both non-time-varying channel and time-varying channel.