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Wideband quadrature error correction (using SVD) forstepped-frequency radar receivers

机译:步进频率雷达接收机的宽带正交误差校正(使用SVD)

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摘要

We present a new technique which corrects the wideband quadrature errors associated with homodyne stepped frequency radar receivers. The correction algorithm is derived using singular value decomposition (SVD) which diagonalizes and scales the covariance matrix of a test signal while preserving the coherent phasor alignment across all frequency steps of the homodyne receiver. Using our technique, the wideband quadrature errors of a 1-2 GHz stepped-frequency radar receiver were corrected to within a 0.1 dB gain imbalance, and to within a 0.5 deg phase imbalance. The Hermitian images were shown to be suppressed by more than 50 dB below the main target peaks
机译:我们提出了一种纠正与零差步进频率雷达接收机相关的宽带正交误差的新技术。使用奇异值分解(SVD)导出校正算法,该算法对角化并缩放测试信号的协方差矩阵,同时在零差接收器的所有频率阶跃上保持相干相量对齐。使用我们的技术,将1-2 GHz步进频率雷达接收机的宽带正交误差校正到0.1 dB的增益不平衡内和0.5度的相位不平衡内。埃尔米特影像显示在主要目标峰以下被抑制了50 dB以上

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