针对跳频电台间同址干扰的特点―干扰强和射频干扰信号的时变特性,提出基于非线性Tansig函数的变步长LMS算法,给出其迭代公式并分析该算法性能。对该算法在自适应跳频同址干扰抵消中的性能进行仿真,仿真结果表明该算法对于非平稳强干扰系统具有很好的收敛速度、收敛精度和稳定性,且其计算量较小,能满足实时非平稳强干扰的自适应抵消的要求。 Aiming to the characteristics of strong interference and radio frequency interference signal, this paper proposes a variable step size LMS algorithm based on non-linear Tansig function. The iterative formula is given and the performance of the algorithm is analyzed. The performance of this algorithm in adaptive FH interference cancellation is simulated. The simulation results show that the proposed algorithm has good convergence speed, convergence precision and stability for non-stationary and strong interference systems, and its computational complexity is small. Meet the real-time non-stationary strong interference adaptive cancellation requirements.