An effective SAR Doppler center estimation method based on inner product

This paper reports a low-complexity method for Doppler center estimation of synthetic aperture radar (SAR) based on inner product operation. Compared to the conventional correlation-based method, the optimal performance may be obtained but with a high computational efficiency. Besides, the problem of "spectrum splitting", trouble for existing inner product-based method, may also be well avoided. Last, the effectiveness of the proposed method is demonstrated using detailed performance analysis based on numerical experiments.