Improving The Performance Of 3-D Sensor Array By Rotation

摘要

In this paper, a method is proposed to improve the performance of 3-D array for DOA estimation. Cancellation of ground clutter received at the array (of sensors) is an important problem to be considered. The approach being addressed to reduced the clutter is based on rotating the 3-D array (a cubical array) by a fixed angle in all the three directions simultaneously. The computer simulations carried out showed that this method was capable of resolving closely spaced sources and also yielded optimum performance in achieving direction of arrivals. Compared to normal cubical array with the same number of elements, the rotated array provides a significant DOA accuracy. Further simulations were also carried out for various angles of rotation.