累量域虛擬陣列二維波達方向估計算法
Cumulant-Based Virtual Array 2-D Direction of Arrival Estimation
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摘要: 利用空間四階累量的孔徑擴展性質(zhì),構(gòu)造了一種新的累量域虛擬陣列波達方向矩陣。由累量域虛擬陣列波達方向矩陣非零特征值的幅值和相位即可分別估計出信號源的方位角和俯仰角。本算法陣元利用率高,陣列布置靈活,由于采用了累量,通過適當(dāng)布置陣列可壓制任意分布噪聲,獲得較好的估計效果。
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關(guān)鍵詞:
- 累量; 波達方向矩陣; DOA; 波達方向估計
Abstract: A new type cumulant-based virtual DOA matrix is formed using the property of aperture extension of fourth-order cumulants. The azimuth and elevation of the incident sources can be estimated simultaneity from the amplitude and phase information of non-zero eigenvalue of the new matrix respectively. With arbitrary geometry of the array, this method can extend actual array aperture efficiently. By properly laying out the array, this algorithm can suppress arbitrary distributed background noise and better estimation of DOA can be obtained. -
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