摘要:
提出一种改进的基于信号空时特征结构的高分辨二维波达方向(DOA)估计方法——时空DOA矩阵方法。该方法在保持原时空DOA矩阵方法无需二维谱峰搜索和参数配对等优点的基础上,通过构造X轴上的平移不变子阵列,产生2个DOA矩阵,利用这2个DOA矩阵的角度兼并曲线的差异,解决了原时空DOA矩阵方法的角度兼并问题。由于2个子阵可以重复利用阵元,该方法基本无冗余阵元和孔径损失。仿真结果证明了该方法的有效性。
关键词:
阵列天线,
智能天线,
波达方向估计,
空时二维处理
Abstract:
Based on the space-time eigenstructure of signals, an improved space-time Direction Of Arrival(DOA) estimation matrix method is proposed to estimate the high-resolution 2-D DOA of narrowband signals. The method obtains two DOA matrices through creating another sub array, which is the primary sub array shifted down X axes. Because these two matrices are different in angle ambiguity curves, the method can get accurate DOA; therefore advantages of the traditional space-time DOA matrix method, such as automatic parameter alignment and no need of 2-D search, are still available. Simulation results show that the method is effective.
Key words:
array antenna,
smart antenna,
Direction Of Arrival(DOA) estimation,
space-time 2-D processing
中图分类号:
许培培, 龚文斌, 余金培, 刘会杰. 一种改进的卫星空时DOA矩阵算法[J]. 计算机工程, 2010, 36(20): 268-271.
HU Pei-Pei, GONG Wen-Bin, TU Jin-Pei, LIU Hui-Jie. Improved Satellite Space-time DOA Matrix Algorithm[J]. Computer Engineering, 2010, 36(20): 268-271.