说明：  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 the IP core simulation calls and error generation model for simulating the effects of FPGA implementation and FFT computation sources of error.)