摘要
阵列幅相误差会影响MUSIC算法的测向精度和角度分辨性能。针对阵列存在小幅相误差的情况,分别推导了MUSIC算法的测向成功概率和角度分辨概率理论公式。通过一阶Taylor级数展开得到了测向偏差和受幅相扰动空域谱的一阶近似表示,结合幅相误差的统计模型和分布特性给出了测向成功概率和角度分辨概率的计算公式。针对均匀线阵给出了数值实验,仿真结果表明:理论值和仿真实验值能够较好的吻合,验证了理论推导的正确性。
Direction-finding（DF）performanee of MUSIC algorithm by the gain-phase errors. Aimed at the case of small gain-phase err ors be affected the DF suceess probability and angle resolution probability of MUSIC algorithm are derived. The first-order approximate mathematical expressions of DF error and spatial spectrum,which is disturbed by the gain-phase errors, are given by the means of firstorder Taylor series expansion, and then the calculation formulas of DF success probability and angle resolution probability of MUSIC algorithm are obtained according to the statistical model and distribution feature of the gain-phase errors. The theoretical analysis is validated through the numerical experiments which are given in the case of uniform linear array（ULA）.
出处
《电波科学学报》
EI
CSCD
北大核心
2010年第4期749-756,共8页
Chinese Journal of Radio Science
关键词
MUSIC算法
幅相误差
测向成功概率
角度分辨概率
Taylor级数展开
MUSIC algorithm
gain-phase errors
direction-finding success probability
angle resolution probability
Taylor series expansion
