Implementation of memory architecture for real-time spaceborne SAR imaging system

Due to the existence of the large scale matrix transposition, the memory bandwidth becomes the bottleneck of the real-time processing in spaceborne SAR imaging. The paper reports a preliminary study result of the memory architecture in the spaceborne SAR imaging system. It consists of algorithm summarizations, implementation difficulty discussions and processing requirement analysis. Then, a new memory architecture is being proposed to improve memory access efficiency and its implementation is specified. Finally, results of different methods are compared and imaging results validates the presented memory architecture.