模型误差对阵列信号特征结构的影响及一种校准方法

The Influnce of Model Error to Array Signal Eigenstructure and a Calibration Method

本文针对阵列信号处理中存在的阵元位置扰动和通道特性不一致两种模型误差，讨论了相位误差对阵列信号特征结构的影响。提出了一组扰动前后特征结构变化的关系式。基于这组公式，提出了一种基于辅助源的校准方法，这种方法可以避免多维搜索和受随机噪声的影响。计算机仿真结果表明了这种方法的有效性。进一步的研究工作尚在进行。

Based on the two kinds of model error. sensor perturbance and channel phase uncertianity. the affect of phase error to array recieved signal correlation matrix eigenstructure is discussed in this paper. The relationship of eigenstructure between ideal model and the error-influnced model is proposed. Based on this relationship. a method of phase error calibration by additional source is proposed. This method can avoid multi-dimension search process and influnce by stochastic noise. Simulation results have proved the advantages of this method.