摘要
将约束总体最小二乘法(CTLS)应用到目标来波信号方向估计(DOA)中,通过将回波角度估计问题转化为约束总体最小二乘问题,采用一种新的迭代求解方法,可以快速求解,大大简化运算,并可快速收敛到全局最优解;在低中度SNR时,CTLS法估计精度要好于求根MUSIC法(ROOT-MUSIC)和基于总体最小二乘(TLS)改进子空间的超分辨方法的估计精度,在HSNR情况下接近克拉美-罗界(CRB),通过仿真结果对比,证明了CTLS方法在超分辨中的高分辨率性能和该方法的有效性。
The Constrained Total Least Squares （CTLS） is introduced to get the DOA of the multi-goals. By switching the super-resolution estimation to the CTLS, we adopt a new iterative method to get the answer of the CTLS to reduce the quantity of computation, and gain the best solution of the whole. The estimated result of the CTLS is better than that of the ROOT-MUSIC and the sub-space division method at low or medium SNR based on TLS, whereas at the high SNR the result is as good as CRB. After simulation we get the high performance and availability of CTLS in the angle super-resolution in comparison with ROOT-MUSIC and TLS.
出处
《中国电子科学研究院学报》
2009年第1期59-62,共4页
Journal of China Academy of Electronics and Information Technology
关键词
超分辨
DOA
将约束总体最小二乘法
super-resolution
DOA
constrained total least squares （CTLS）
