An Efficient Real-Time Data Compression Method for Frequency-Modulated Continuous Wave SAR

FMCW-SAR reduces data rate through dechirping, but its raw data still contains a significant amount of redundancy, which affects real-time imaging. This article introduces an efficient data compression method that utilizes FMCW-SAR fixed system and motion parameters. It can significantly reduce data rates through simple data extraction, windowing, and other operations. Through actual flight test data, this method achieved a nearly 20-fold reduction in data rate without compromising image quality, effectively alleviating the burden of subsequent real-time image processing.