摘要
采用4K点复数FFT实现8K实数点FFT;数据存储单元采用双口乒乓RAM结构;采用级联结构流水线的设计方式,基4蝶形结构完成前6级的运算,双基2蝶形结构完成最后一级运算;使用块浮点溢出检测.实验结果表明,在时钟周期为8.74ns的正常状态下,采用FFT处理器实现8K实数点FFT仅需要35.799μs,达到了高速运算的目的.
The paper is about using 4k - point complex FFT to realize 8k - point real FFT, the data storage units adopts double - port Ping - pong RAM and the level coupling structure design mode. A pipeline is employed. The radix 4 butterfly implement forward 6 grades computation and Double Radix 2 butterfly implement the last grades computation. At the same time, the block floating- point overflow was used to test. Experimentation indicates that adopting FFT processor realizes 8K - point real FFT just needs 35,799μs, under the common state that the clock - period is 8.74 ns, this gets the results of high - speed calculation.
出处
《佳木斯大学学报（自然科学版）》
CAS
2009年第2期217-220,共4页
Journal of Jiamusi University：Natural Science Edition
