采用MATLAB实现定点的FFT运算，但是仿真硬件结构的IP核调用以及误差产生模式，用于仿真FPGA实现FFT运算的效果和误差来源。-FPGA to realize the company s 68013A paragraph Cypress USB chip used SLAVEFIFO read operation, the fixed-point implementation using MATLAB FFT operation, but the hardware structure of