The Design of Radix-4 FFT by FPGA

This paper designs and realizes a synthetic aperture radar (SAR) real-time processor by FPGA chip, Radix-4FFT is the kernel processing in compression algorithm of SAR; The memory organization of Radix-4 FFT is considered. The design of the block floating Radix-4 FFT is valuable in military and civil application, and the complete of transpose is valuable for the later SAR real-time processing research. This paper analyses the performance advantages of using FPGA, and present the processing result of a frame of airborne SAR original data.