关键词: 误差校正, 宽带阵列, 横向滤波器, 最小二乘拟合

Abstract: The high order of the transversal filter for array error calibration is required when designing the filter in the whole first Nyquist region. The proposed methodology only considers the match in pass band of the signal, so that the order of the filter is much less. The least square fitting criteria is employed to compute the real coefficients of the calibration filter. In addition, a passband filter is utilized before the calibration unit to keep the noise acceptable. Compared with the traditional one, the new scheme improves the accuracy of the calibration filter in signal band with the same order of filter. The experiments in indoor chamber with MSK signal illustrate the effectiveness of new methodology.

Key words: error calibration, broadband array, transversal filter, least square fitting