摘要
基于多核架构提出了一种适用于长期演进技术(LTE)下行链路128~2048/1536点快速傅里叶变换(FFT)计算的算法,并进行了仿真.利用多核结构将FFT算法进行并行划分,采用流水线并行和数据并行的结构,减少运行时间.同时将该算法基于一块使用TSMC 65nm工艺制成的多核芯片上实现,在750MHz的工作频率下,计算128~2048/1536点FFT的芯片实测功耗为282~366mW,能量效率为每点35.4~84.33nJ.与其他设计相比,运行速度最多能提高近6倍,计算大点数FFT时,能量效率可提高约20%.
We propose a 128-2048/1536-point FFT implementation based on a multi-core processor for LTE downlink system.Considering the multi-core architecture,we optimize the FFT algorithm by using the pipeline parallelism and data parallelism structure to reduce the calculation time.The multi-core processor was designed and implemented using TSMC 65nm technology.Test results show that the FFT application dissipates 282-366mW at 1.2V,750MHz for 128-2048/1536 points.And the energy dissipation ranges from 35.4-84.33nJ.Compared with other works,the calculation time of this work can be reduced by 6 times and the energy efficiency can be increased by about 20% for big FFT.
出处
《复旦学报(自然科学版)》
CAS
CSCD
北大核心
2013年第3期285-291,296,共8页
Journal of Fudan University:Natural Science
基金
"新一代宽带无线移动通讯网"重大专项2011年课题资助项目(2011ZX03003-003-03)
关键词
多核架构
长期演进技术
快速傅里叶变换
multi-core architecture
long term evolution(LTE)
fast Fourier transform(FFT)