基于ASIC的128点FFT处理器的设计

所研究的芯片是128点定点FFT处理器,该处理器主要应用于超宽带无线通信系统.采用一种适合于128点快速傅里叶变换(FFT)的混合基-22/2的按频率抽取算法,并在此基础上设计一种并行运算与流水线结构相结合的硬件系统.详细描述了系统状态机的设计,最终实现了一个满足时序和设计工艺要求,达到了以下指标:工作频率66 MHz,芯片面积3.54 mm2,功耗为71.6 mW的高性能的FFT的IP处理器核.

The design of 128- point FFT processor based on ASIC

We introduces the design of 128-point fixed-point FFT processor which is primarily applied in the MB-OFDM based UWB system,and based on the radix-22/2 arithmetic of 128-point Fast Fourier Transform(FFT),a parallel and pipeline hardware architecture of FFT processor was designed.Then the state machine of the FFT controller was designed.Finally a FFT IP controller core with high performances was realized,which meets the demand timing and design technology and the whole system reaches the following target: the 66MHz working frequency,the 3.54mm2 area and the 71.6mW power dissipation.