Based on the time serial signal generated by power spectrum density inversion, the closed-loop compensation residual variances of tracking loop and high-order error correction loop with finite error rejection -3 dB bandwidth and time delay are simulated. The data fitting results of relationships between residual variances and corresponding error rejection -3 dB bandwidths are obtained. The system effective bandwidths are modified so as to make the estimate of residual variances more precise.
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