CAJ | 학술논문

针对非相干散射信号源稳健波束形成问题，提出了一种均匀直线阵下通用信号模型稳健波束形成算法。该算法通过引入数据共轭重排理论，利用定义的两个转换矩阵，重新构造信号协方差矩阵，给出了最优权矢量的实值闭式表达式，减少了算法的计算复杂度。仿真分析了期望信号信噪比、指向误差、快拍数及失配约束参数对输出信干噪比的影响。仿真实验表明，通过对接收数据的共轭重排再利用，提高了算法在快拍数有限、存在有用信号失配及其他失配等非理想条件下的输出性能。
침대비상간산사신호원은건파속형성문제，제출료일충균균직선진하통용신호모형은건파속형성산법。해산법통과인입수거공액중배이론，이용정의적량개전환구진，중신구조신호협방차구진，급출료최우권시량적실치폐식표체식，감소료산법적계산복잡도。방진분석료기망신호신조비、지향오차、쾌박수급실배약속삼수대수출신간조비적영향。방진실험표명，통과대접수수거적공액중배재이용，제고료산법재쾌박수유한、존재유용신호실배급기타실배등비이상조건하적수출성능。
For the robust adaptive beamforming problem of incoherently scattered signals,a robust beamforming algorithm for general signal models based on the uniform linear array(ULA)is proposed.By introducing the conj ugate data rearrangement method, two transformation matrices are defined to reconstruct the signal covariance matrices.Based on the new signal covariance matrices,the proposed algorithm gives a real valued close-form solution for the optimum weight vector to reduce the computational complexity.Then,the influences of the Signal-Noise-Ratio,snapshots,look direction errors and mismatch constraint parameters on the output Signal-Interference-Noise-Ratio are discussed in detail.The conj ugate data is rearranged and reused in the new covariance matrix,so that the performance is obviously improved under the conditions of a limited number of snapshots,the severe signal mismatch and so on.Simulations illustrate the effectiveness of the proposed method.