中文摘要：

针对空时联合抗干扰方法（STAP）计算复杂度高,不能有效抑制来自导航信号方向的窄带干扰等问题。利用改进的频域LMS滤波器进行前期处理,滤除来自导航信号方向的窄带干扰;再利用改进的变遗忘因子恒模约束递归最小二乘算法（ITVFF-CCM-RLS）来降低空时处理的计算复杂度。通过仿真实验结果表明,改进的空时联合抗干扰算法能够在降低计算复杂度的同时,有效地抑制来自导航信号方向的窄带干扰,明显提高了算法的输出信干噪比。

英文摘要：

The performance of joint space-time anti-jamming interference method is better than the pure airspace or pure temporal anti-jamming interference.Because of its computational complexity and not suppressing the narrowband interference owning the same direction with navigation signal,the method is subjected to certain limitations in the practical application.To solve these problems,the improved Frequency LMS filter is introduced in this paper to filter the narrowband interference from the navigation signal direction in advance;the improved variable forgetting factor recursive least squares constant modulus algorithm ITVFF-CCM-RLS is introduced in this paper to reduce the computational complexity and complete space-time array weights fast iteration;The simulation results show that the anti-jamming capability of the improved spacetime joint processing algorithm is significantly enhanced under the premise that the complexity of the algorithm is significantly reduced.