基于互质阵列孔洞分析的稀疏阵列设计方法

针对互质阵列产生连续延迟较少且冗余度高的问题,该文提出了两种基于互质阵列的稀疏设计方法.首先,通过分析阵元位置对互质阵列差分共阵总延迟和连续延迟影响,得出互质阵列在去掉特定阵元后,将不改变连续延迟拓扑.然后,优化传感器阵列布局,在保持整个阵列的阵元数不变的条件下,增加阵列连续延迟数量.其后,分别推得了两种提出阵列设计方...

Sparse Array Design Methods Based on Hole Analysis of the Coprime Array

For the problem of a low number of consecutive lags and high redundancy of sensors in the coprime array, two sparse arrays are proposed in this paper. First, by analyzing the influence of the sensor positions on the unique lags and consecutive lags of the difference coarray, it is concluded that the range of the consecutive lags in the coprime array is not changed after removing the specific sensors. Then, entire array structure is optimized while keeping the number of sensors unchanged, increasing the number of consecutive lags. Afterward, mathematical expressions of the consecutive lags and degree of freedoms of the proposed arrays are derived respectively. Finally, simulations are carried out with the same physical sensors and the identical estimation method to verify the DOA estimation performance of the proposed sparse arrays.