计算机科学 ›› 2015, Vol. 42 ›› Issue (11): 53-55.doi: 10.11896/j.issn.1002-137X.2015.11.009

• 2014年全国高性能计算机学术年会 • 上一篇    下一篇

互相关运算在银河飞腾DSP上的实现及优化

杨琳,吴家铸,扈啸,田希   

  1. 国防科学技术大学计算机学院 长沙410073,国防科学技术大学计算机学院 长沙410073,国防科学技术大学计算机学院 长沙410073,国防科学技术大学计算机学院 长沙410073
  • 出版日期:2018-11-14 发布日期:2018-11-14

Realization and Optimization of Cross-correlation Based on YHFT-QDSP

YANG Lin, WU Jia-zhu, HU Xiao and TIAN Xi   

  • Online:2018-11-14 Published:2018-11-14

摘要: 在信号处理领域中,互相关运算对于寻找未知信号中的特性具有重要的作用。互相关常被用于图像匹配、粒子图像测速等领域。针对互相关运算计算量大而实时系统中要求较快运算速度的问题,利用银河飞腾多核DSP(YHFT-QDSP)的FFT加速器完成二维FFT运算,在YHFT-QDSP上实现了互相关运算,从而提高了互相关运算在实时系统中的性能,并在此基础上针对输入数据大小的不同提出了若干优化的方法,进一步提高了互相关运算的性能。

关键词: 二维FFT,互相关,优化,银河飞腾DSP

Abstract: In the field of signal processing,cross-correlation plays an important role in finding an unknown signal’s feature.Cross-correlation is often used in areas such as image matching and particle image velocimetry.For large cross-correlation calculation and requirements of faster computing speed in real-time systems,in order to improve cross-correlation’s performance in real-time systems,we used the FFT accelerators of YHFT-QDSP to achieve 2D-FFT.Cross-correlation was realized based on YHFT-QDSP and this paper proposed some optimizations based on the size of input to improve the performance of cross-correlation.

Key words: 2D-FFT,Cross-correlation,Optimization,YHFT-QDSP

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