跳频同址干扰的自适应IIR抵消方法

摘要

Frequency-selective frequency hopping (FH) cosite interference is a typical wideband time-varying interference. The Infinite Impulse Response (IIR) filter can match this long impulse response system better with much fewer coefficients compared with the Finite Impulse Response (FIR) filter. Using IIR filter can get the merit of little computation and high efficiency but cannot ensure global convergence and stability. A new adaptive interference canceller based on the equation-error structure IIR-SHARF filter is proposed and is characterized with the superiority of global convergence and stability. The superiority of the algorithm in the cancellation for frequency-selective FH cosite interference is shown via the computer simulation.%频率选择性跳频同址干扰是一个典型的宽带时变干扰,使用IIR滤波器以较少的阶数即可与这样的长脉冲响应系统匹配,但其不能保证全局收敛和稳定性因而影响其实际应用.提出一种基于自适应方程误差结构IIR-SHARF算法的干扰抵消器,新算法具有良好的全局收敛性和稳定性,仿真结果表明该算法对具有长脉冲响应特性的跳频同址干扰抑制效果较好.