阵元位置误差和通道不一致性的校正方法

Calibration Method for Sensor Position Error and Channel Uncertainty

针对等距线性阵列天线的阵元位置误差和通道幅度相位不一致性问题 ,提出了一种采用单校正源分时多方位的无相位延迟模糊校正方法 .该方法无须准确已知校正源入射角 ,对于通道幅度相位参数没有任何限制 ,对于噪声具有较强的坚韧性 ,而且在校正源频率有一定的估计误差时也可较准确地估计阵元位置参数 .文中对校正方位的配置问题进行了分析 ,提出了使测量误差较小的优化配置方案 .

A method of calibrating the sensor position error, channel gain and phase uncertainties of equi-spaced linear array without phase delay ambiguity was presented. It uses single calibration source at different relative position to the array without exact information of direction-of-arrival. It is robust to the noise without any limitation on channel gain and phase parameters and can still estimate the sensor position under the calibration frequency estimation errors. The problem of calibration direction configuration was probed and some optimizing method was presented to minimize the estimation errors. The computer simulations demonstrate the effectiveness of the proposed method and some results as to the calibration direction configuration.