摘要
简述了空间超分辨测向原理,指出目前国内外大都是研究线阵超分辨测向,但不适用于舰载测向系统.根据舰载测向系统需要对360°范围内进行测向,提出了圆阵超分辨测向的设想,建立了圆阵空间谱估计超分辨测向的数学模型.由于所测信源之间是非相干的,故采用MUSIC算法.以五单元圆阵为例,实现了对360°范围内的4个信源同时超分辨测向.进行了计算机仿真,并分别对分布在不同方向上的4个信源进行了仿真测试,取得了良好的效果.证实了设想、数学模型及算法的正确性和可使用性.
This paper introduces a space super-resolution direction estimate principle and points out that most of the researches now are focusing on line-antenna array super_resolution direction estimation, but this method is not fit for direction estimate system on ship. On the grounds of 360°range direction estimation request of ship-based direction estimate system, this paper expounds circle_antenna array super_resolution direction estimate principle and establishes mathematical model. Because the radiate targets which we want to direction estimate are irrelevance, we intend to use MUSIC algorithm. Four radiate targets in 360°range are super_resolution direction estimated by five units-circle array. We emulate the algorithm by estimating four targets on different direction on computer and get good result. The emulation proves that this paper's algorithm is valid and executable.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
2002年第5期102-106,共5页
Journal of Harbin Engineering University
