| 实序列并行IFFT在Blackfin DSP上的实现 |
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| 引用本文： | 李刚,高峰,林凌.实序列并行IFFT在Blackfin DSP上的实现[J].电子技术应用,2009,35(2). |
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| 作者姓名： | 李刚 高峰 林凌 |
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| 作者单位： | 天津大学,天津市生物医学检测技术与仪器重点实验室,天津,300072,China |
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| 摘 要： | 针对DSP上常用的实序列IFFT算法运算速度慢的缺陷,采用两行实序列合并为一行复序列进行IFFT运算的方法编制了在Blackfin系列DSP上进行实序列基-2 IFFT运算的程序。实验表明,结合DSP指令的并行性及硬件并行结构的软件设计提高了运算速度,完成两行512点实序列的IFFT运算只需要11864个时钟周期,为原来方法所需时间的一半。该方法应用于基于BF561的并行频域OCT图像处理系统中,满足系统实时处理的要求。
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| 关 键 词： | 实序列IFFT Blackfin DSP 并行 |
Implementation of real-number parallel IFFT algorithm in Blackfin DSP |
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| LI Gang,GAO Feng,LIN Ling.Implementation of real-number parallel IFFT algorithm in Blackfin DSP[J].Application of Electronic Technique,2009,35(2). |
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| Authors: | LI Gang GAO Feng LIN Ling |
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| Abstract: | To calculate real-number IFFT,and avoid low processing speed of existing real-number IFFT algorithm in DSP,a new program of real-number radix-2 IFFT in the Blackfin DSP is designed,which combines two real-number rows to one complex-number row.Results of experiment show that software based on parallel instruction and hardware parallel architecture improves the processing speed,can process two real-number rows(512 points per row)IFFT during 11864 cycles,which is half of time of former algorithm.The new program has been applied to the PSDOCT image pre-process system based on BF561,and satisfy the real-time imaging. |
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| Keywords: | Blackfin DSP |
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