多约束实数权的直接数据域算法在空时自适应处理中的应用

传统的空时自适应处理算法通过权矢量幅度和相位的改变来实现,本文研究了空时自适应处理中一种改进的直接数据域(Directdata domain,DDD)算法。该方法仅通过权矢量幅度的改变,对一次样本数据进行处理,有效地抑制杂波和干扰,实现对目标信号的正确估计。采用实数权减小了运算量,降低系统的复杂程度。当目标信号的方向与天线波束指向有偏差时,采用多约束的方法,保证系统在目标信号方向的增益。仿真结果表明该方法的有效性。

Space-Time Adaptive Processing Using Multiple Constraints of Real Weighs Based on Direct Data Domain Approach

Traditional space-time adaptive processing algorithms can be implemented in the airborne radar system by changing both the amplitude and the phase of weights associated with each array element.An improved direct data domain(DDD) method is studied in the space-time adaptive processing.Based on a single snapshot,the algorithm can estimate the interest signal and null interference.The amplitude variation with the fixed phase for weights connected with the spacetime data reduce the computational complexity.By implementing multiple space-time constraints,the system gain is maintained on the interest signal when the signal arrivals slightly offset in angle,Doppler,or both.Simulation results prove the effectiveness of the method.