3．完成系统的FPGA程序开发与调试，主要包括FFT，IFFT，CMUL和转置

存储控制等模块，在此基础上，重点介绍了一种基于DDR SDRAM的行写行读高

效转置存储算法，在采用该算法进行转置存储操作时，读写两端的速度相匹配，

满足流水线操作要求，提高了整个系统的实时性。最后介绍了采用CORDIC算法

实现复图像求模运算的方法，分析了算法的硬件实现结构，并给出了基于FPGA

的实现方法及仿真结果。-he FPGA s development and debugging are implemented,including FFT, IFFT, CMUL and C0ntrol of CTM．Based Oll this，Implementation of a high efficient corner turn memory arithmetic with writing and reading by row based on DDR SDRAM is introduced．When using CTM with this algorithm，me speed of reading and writing maItches and meets the requirement of pipelined operation．Finally a method of model implementation for complex image based on CORDIC algorithm is introduced．The algorithm’s hardware implementation structure is analysed, and implementation methodology and simulation results are given