| 摘要: |
| 面向无线个人局域网应用设计了一种高吞吐量、低复杂度的2 048点快速傅里叶变换处理器。提出了新型改良基-26算法用于降低硬件实现复杂度，采用多路径负反馈架构来提高数据吞吐量。为了减少硬件成本，采取正则有符号数常数乘法器替代布斯乘法器完成除旋转因子W2048外所有旋转因子的复数乘法运算。另外，采用了一种减少存储旋转因子W2048系数只读存储器空间的方法，将其存储空间减少为原来的一半。基于QUARTUS PRIME平台的仿真结果显示，工作频率为320 MHz时，最高数据吞吐速率达到了2.6 Gsample/s,而且对比以往的研究方案至少可节约逻辑单元使用量23%,记忆体单元使用量12%。 |
| 关键词: 无线个局域网（WPAN） 快速傅里叶变换处理器 多路径延迟负反馈(MDF)架构 改良基-26算法 |
| DOI： |
|
| 基金项目:河北省自然科学基金项目(F2020101001) ；河北省引进留学人员资助项目(C20210301) ；河北省承德市科学技术研究与发展计划项目(202001B014) ；河北省承德市高新区汇智领创空间项目(HZLC2021015) |
|
| Design of a low-complexity and high-throughput FFT processor by using modified radix-26 algorithm |
| YU Jian |
| (School of Physics and Electronic Engineering,Hebei Normal University for Nationalities,Chengde 067000,China) |
| Abstract: |
| A high-throughput low-complexity 2 048-point fast Fourier transform(FFT) processor is designed for wireless personal area network(WPAN) applications.A novel modified radix-26 algorithm is proposed for reducing the hardware complexity,and multi-path delay feedback(MDF) architecture is adopted for high data throughput.For less hardware-cost,it also uses canonical signed digit(CSD) constant multiplier instead of Booth multiplier to achieve thecomplex multiplications of twiddle factors except W2048.In addition,a reduction method of read-only memory(ROM) for storing the coefficients of twiddle factor W2048 is adopted,which can halve the ROM size.The simulation result based on QUARTUS PRIME shows that the highest throughput rate is up to 2.6 Gsample/s at 320 MHz.Furthermore,the proposed scheme can reduce at least 23% logic elements and 12% memory bits compared with previous schemes. |
| Key words: wireless personal area network(WPAN) FFT processor multi-path delay feedback(MDF) architecture modified radix-2 6 algorithm |
