Relationship Between Mutual Coupling Coefficient Calibration Error and Number of Snapshots in Array Signal Processing

In array signal processing, there exists a significant correlation between mutual coupling coefficient calibration error and the number of snapshots. Mutual coupling coefficient calibration error refers to the deviation occurring during mutual coupling compensation in array signal processing systems, caused by various influencing factors. The number of snapshots represents the quantity of data captures processed in array signal acquisition and analysis. Research indicates that as the number of snapshots increases, the mutual coupling coefficient calibration error correspondingly increases. This relationship can be modeled using statistical estimation algorithms where calibration accuracy depends on sample size. Therefore, when implementing array signal processing systems, careful consideration of the relationship between mutual coupling calibration error and snapshot count is essential to ensure processing accuracy and reliability. Implementation typically involves covariance matrix estimation and mutual coupling matrix inversion operations, where snapshot quantity directly affects estimation variance.