A Novel Phase Error Estimation Algorithm Based on Extended Subspace Projection of Multi-plane Waves Reconstruction Model

A minimum side-zone power to central-zone power ratio (MSPCPR) phase error estimation algorithm is proposed to address the challenge of high-precision phase error estimation under the condition of low signal-to-noise ratio(SNR). This algorithm is based on the extended subspace projection multiplane-wave (SP-M) reconstruction model and the law of signal clutter spectrum attenuation. According to the experimental results, this algorithm still performs well when there is small SNR.