CAJ | 학술논문

针对有源干扰背景下信号源和干扰源的个数超过线阵的自由度而产生线阵饱和现象，提出一种将约束最小冗余线阵与干扰对消技术相结合的测向方法。通过将无源状态和有源状态下线阵输出数据的协方差矩阵进行对消运算去除有源干扰和噪声分量，并对约束最小冗余线阵的波达方向（DOA）估计算法进行改进，构造了新的协方差Toeplitz矩阵，有效抑制了由阵列非均匀性导致的伪峰，提高了阵列的DOA估计性能。仿真结果表明：该算法在低信噪比背景下具有抗有源干扰能力，扩展了阵列孔径，并具有较高的测向精度和鲁棒性。
침대유원간우배경하신호원화간우원적개수초과선진적자유도이산생선진포화현상，제출일충장약속최소용여선진여간우대소기술상결합적측향방법。통과장무원상태화유원상태하선진수출수거적협방차구진진행대소운산거제유원간우화조성분량，병대약속최소용여선진적파체방향（DOA）고계산법진행개진，구조료신적협방차Toeplitz구진，유효억제료유진렬비균균성도치적위봉，제고료진렬적DOA고계성능。방진결과표명：해산법재저신조비배경하구유항유원간우능력，확전료진렬공경，병구유교고적측향정도화로봉성。
To resolve the problems of linear array saturation phenomenon when the number of signal and jammer were larger than the degree of freedom of linear array in active, a technique of direction finding based on re-stricted minimum redundant linear arrays and interference canallation was proposed. The jammers and noises were cancelled after doing subtraction of two covariance matrices of the linear array output in passive and ac-tive cases. The DOA estimation algorithm on restricted minimum redundant linear array was improved by con-structing a new toeplitz covariance matrix. The simulation showed that the algorithm was of better performance in low SNR, such as anti-active jamming, extending aperture, high precision and robustness.