文件名称:F2812-FFT
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- 上传时间:2012-11-16
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文件大小:395.39kb
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FFT 并不是一种新的变换,它是离散傅立叶变换(DFT)的一种快速算法。由于我们在计算DFT 时一次复数乘法需用四次实数乘法和二次实数加法;一次复数加法则需二次实数加
法。每运算一个X(k)需要4N 次复数乘法及2N+2(N-1)=2(2N-1)次实数加法。所以
整个DFT 运算总共需要4N^2 次实数乘法和N*2(2N-1)=2N(2N-1)次实数加法。如此一来,计算时乘法次数和加法次数都是和N^2 成正比的,当N 很大时,运算量是可观的,因而需要
改进对DFT 的算法减少运算速度。-FFT is not a new transformation, it is the discrete Fourier transform (DFT) of a fast algorithm. Since we have a complex multiplication when calculating DFT Xuyong four real multiplications and real additions secondary a complex quadratic addition Zexu real addition. Each operator of a X (k) requires 4N times complex multiplication and 2N+2 (N-1) = 2 (2N-1) times the real number addition. Therefore, the DFT computation requires 4N ^ 2 times in total real multiplications and N* 2 (2N-1) = 2N (2N-1) times the real number addition. Thus, when calculating the number of multiplications and additions and are proportional to N ^ 2, when N is large, the computation is considerable and, therefore, need to improve on the DFT algorithm to reduce computational speed.
法。每运算一个X(k)需要4N 次复数乘法及2N+2(N-1)=2(2N-1)次实数加法。所以
整个DFT 运算总共需要4N^2 次实数乘法和N*2(2N-1)=2N(2N-1)次实数加法。如此一来,计算时乘法次数和加法次数都是和N^2 成正比的,当N 很大时,运算量是可观的,因而需要
改进对DFT 的算法减少运算速度。-FFT is not a new transformation, it is the discrete Fourier transform (DFT) of a fast algorithm. Since we have a complex multiplication when calculating DFT Xuyong four real multiplications and real additions secondary a complex quadratic addition Zexu real addition. Each operator of a X (k) requires 4N times complex multiplication and 2N+2 (N-1) = 2 (2N-1) times the real number addition. Therefore, the DFT computation requires 4N ^ 2 times in total real multiplications and N* 2 (2N-1) = 2N (2N-1) times the real number addition. Thus, when calculating the number of multiplications and additions and are proportional to N ^ 2, when N is large, the computation is considerable and, therefore, need to improve on the DFT algorithm to reduce computational speed.
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下载文件列表
F2812-FFT/
F2812-FFT/cc_build_Debug.log
F2812-FFT/Debug/
F2812-FFT/Debug/DSP281x_CodeStartBranch.obj
F2812-FFT/Debug/DSP281x_DefaultIsr.obj
F2812-FFT/Debug/DSP281x_GlobalVariableDefs.obj
F2812-FFT/Debug/DSP281x_PieCtrl.obj
F2812-FFT/Debug/DSP281x_PieVect.obj
F2812-FFT/Debug/DSP281x_Spi.obj
F2812-FFT/Debug/DSP281x_SysCtrl.obj
F2812-FFT/Debug/fft.map
F2812-FFT/Debug/fft.obj
F2812-FFT/Debug/fft.out
F2812-FFT/Debug/fir.map
F2812-FFT/Debug/fir.obj
F2812-FFT/Debug/fir.out
F2812-FFT/Debug.lkf
F2812-FFT/Debug.lkv
F2812-FFT/Example_281xSpi_FFDLB.gel
F2812-FFT/Example_281xSpi_FFDLB.paf
F2812-FFT/f2812a.h
F2812-FFT/fft.c
F2812-FFT/fft.cmd
F2812-FFT/fft.CS_/
F2812-FFT/fft.CS_/FILE.CDX
F2812-FFT/fft.CS_/FILE.DBF
F2812-FFT/fft.CS_/FILE.FPT
F2812-FFT/fft.CS_/SYMBOL.CDX
F2812-FFT/fft.CS_/SYMBOL.DBF
F2812-FFT/fft.CS_/SYMBOL.FPT
F2812-FFT/fft.paf
F2812-FFT/fft.paf2
F2812-FFT/fft.pjt
F2812-FFT/fft.sbl
F2812-FFT/sina1.dat
F2812-FFT/sine.dat
icetek.cfg
ICETEKEMUReset.bat
DSP281x_board_headers/
DSP281x_board_headers/GEL/
DSP281x_board_headers/GEL/f2812a.gel
DSP281x_board_headers/include/
DSP281x_board_headers/include/f2812a.h
DSP281x_board_headers/include/f2812a.h.bak
DSP281x_common/
DSP281x_common/cmd/
DSP281x_common/cmd/F2810.cmd
DSP281x_common/cmd/F2812.cmd
DSP281x_common/cmd/F2812_EzDSP_RAM_lnk.cmd
DSP281x_common/cmd/F2812_XintfBoot.cmd
DSP281x_common/include/
DSP281x_common/include/DSP281x_DefaultIsr.h
DSP281x_common/include/DSP281x_Examples.h
DSP281x_common/include/DSP281x_GlobalPrototypes.h
DSP281x_common/include/DSP281x_SWPrioritizedIsrLevels.h
DSP281x_common/source/
DSP281x_common/source/DSP281x_Adc.c
DSP281x_common/source/DSP281x_CodeStartBranch.asm
DSP281x_common/source/DSP281x_CpuTimers.c
DSP281x_common/source/DSP281x_CSMPasswords.asm
DSP281x_common/source/DSP281x_DBGIER.asm
DSP281x_common/source/DSP281x_DefaultIsr.c
DSP281x_common/source/DSP281x_ECan.c
DSP281x_common/source/DSP281x_Ev.c
DSP281x_common/source/DSP281x_Gpio.c
DSP281x_common/source/DSP281x_InitPeripherals.c
DSP281x_common/source/DSP281x_Mcbsp.c
DSP281x_common/source/DSP281x_MemCopy.c
DSP281x_common/source/DSP281x_PieCtrl.c
DSP281x_common/source/DSP281x_PieVect.c
DSP281x_common/source/DSP281x_Sci.c
DSP281x_common/source/DSP281x_Spi.c
DSP281x_common/source/DSP281x_SWPrioritizedDefaultIsr.c
DSP281x_common/source/DSP281x_SWPrioritizedPieVect.c
DSP281x_common/source/DSP281x_SysCtrl.c
DSP281x_common/source/DSP281x_SysCtrl.c.bak
DSP281x_common/source/DSP281x_usDelay.asm
DSP281x_common/source/DSP281x_Xintf.c
DSP281x_common/source/DSP281x_XintfBootReset.asm
DSP281x_common/source/DSP281x_XIntrupt.c
DSP281x_common/source/myapp.h
DSP281x_headers/
DSP281x_headers/cmd/
DSP281x_headers/cmd/DSP281x_Headers_BIOS.cmd
DSP281x_headers/cmd/DSP281x_Headers_nonBIOS.cmd
DSP281x_headers/gel/
DSP281x_headers/gel/DSP281x_GpioQuickRef.gel
DSP281x_headers/gel/DSP281x_Peripheral.gel
DSP281x_headers/include/
DSP281x_headers/include/DSP281x_Adc.h
DSP281x_headers/include/DSP281x_CpuTimers.h
DSP281x_headers/include/DSP281x_DefaultIsr.h
DSP281x_headers/include/DSP281x_DevEmu.h
DSP281x_headers/include/DSP281x_Device.h
DSP281x_headers/include/DSP281x_ECan.h
DSP281x_headers/include/DSP281x_Ev.h
DSP281x_headers/include/DSP281x_Gpio.h
DSP281x_headers/include/DSP281x_Mcbsp.h
DSP281x_headers/include/DSP281x_PieCtrl.h
DSP281x_headers/include/DSP281x_PieVect.h
DSP281x_headers/include/DSP281x_Sci.h
DSP281x_headers/include/DSP281x_Spi.h
DSP281x_headers/include/DSP281x_SysCtrl.h
DSP281x_headers/include/DSP281x_Xintf.h
DSP281x_headers/include/DSP281x_XIntrupt.h
DSP281x_headers/include/f2812a.h
DSP281x_headers/include/stdio.h
DSP281x_headers/source/
DSP281x_headers/source/DSP281x_GlobalVariableDefs.c
F2812-FFT/cc_build_Debug.log
F2812-FFT/Debug/
F2812-FFT/Debug/DSP281x_CodeStartBranch.obj
F2812-FFT/Debug/DSP281x_DefaultIsr.obj
F2812-FFT/Debug/DSP281x_GlobalVariableDefs.obj
F2812-FFT/Debug/DSP281x_PieCtrl.obj
F2812-FFT/Debug/DSP281x_PieVect.obj
F2812-FFT/Debug/DSP281x_Spi.obj
F2812-FFT/Debug/DSP281x_SysCtrl.obj
F2812-FFT/Debug/fft.map
F2812-FFT/Debug/fft.obj
F2812-FFT/Debug/fft.out
F2812-FFT/Debug/fir.map
F2812-FFT/Debug/fir.obj
F2812-FFT/Debug/fir.out
F2812-FFT/Debug.lkf
F2812-FFT/Debug.lkv
F2812-FFT/Example_281xSpi_FFDLB.gel
F2812-FFT/Example_281xSpi_FFDLB.paf
F2812-FFT/f2812a.h
F2812-FFT/fft.c
F2812-FFT/fft.cmd
F2812-FFT/fft.CS_/
F2812-FFT/fft.CS_/FILE.CDX
F2812-FFT/fft.CS_/FILE.DBF
F2812-FFT/fft.CS_/FILE.FPT
F2812-FFT/fft.CS_/SYMBOL.CDX
F2812-FFT/fft.CS_/SYMBOL.DBF
F2812-FFT/fft.CS_/SYMBOL.FPT
F2812-FFT/fft.paf
F2812-FFT/fft.paf2
F2812-FFT/fft.pjt
F2812-FFT/fft.sbl
F2812-FFT/sina1.dat
F2812-FFT/sine.dat
icetek.cfg
ICETEKEMUReset.bat
DSP281x_board_headers/
DSP281x_board_headers/GEL/
DSP281x_board_headers/GEL/f2812a.gel
DSP281x_board_headers/include/
DSP281x_board_headers/include/f2812a.h
DSP281x_board_headers/include/f2812a.h.bak
DSP281x_common/
DSP281x_common/cmd/
DSP281x_common/cmd/F2810.cmd
DSP281x_common/cmd/F2812.cmd
DSP281x_common/cmd/F2812_EzDSP_RAM_lnk.cmd
DSP281x_common/cmd/F2812_XintfBoot.cmd
DSP281x_common/include/
DSP281x_common/include/DSP281x_DefaultIsr.h
DSP281x_common/include/DSP281x_Examples.h
DSP281x_common/include/DSP281x_GlobalPrototypes.h
DSP281x_common/include/DSP281x_SWPrioritizedIsrLevels.h
DSP281x_common/source/
DSP281x_common/source/DSP281x_Adc.c
DSP281x_common/source/DSP281x_CodeStartBranch.asm
DSP281x_common/source/DSP281x_CpuTimers.c
DSP281x_common/source/DSP281x_CSMPasswords.asm
DSP281x_common/source/DSP281x_DBGIER.asm
DSP281x_common/source/DSP281x_DefaultIsr.c
DSP281x_common/source/DSP281x_ECan.c
DSP281x_common/source/DSP281x_Ev.c
DSP281x_common/source/DSP281x_Gpio.c
DSP281x_common/source/DSP281x_InitPeripherals.c
DSP281x_common/source/DSP281x_Mcbsp.c
DSP281x_common/source/DSP281x_MemCopy.c
DSP281x_common/source/DSP281x_PieCtrl.c
DSP281x_common/source/DSP281x_PieVect.c
DSP281x_common/source/DSP281x_Sci.c
DSP281x_common/source/DSP281x_Spi.c
DSP281x_common/source/DSP281x_SWPrioritizedDefaultIsr.c
DSP281x_common/source/DSP281x_SWPrioritizedPieVect.c
DSP281x_common/source/DSP281x_SysCtrl.c
DSP281x_common/source/DSP281x_SysCtrl.c.bak
DSP281x_common/source/DSP281x_usDelay.asm
DSP281x_common/source/DSP281x_Xintf.c
DSP281x_common/source/DSP281x_XintfBootReset.asm
DSP281x_common/source/DSP281x_XIntrupt.c
DSP281x_common/source/myapp.h
DSP281x_headers/
DSP281x_headers/cmd/
DSP281x_headers/cmd/DSP281x_Headers_BIOS.cmd
DSP281x_headers/cmd/DSP281x_Headers_nonBIOS.cmd
DSP281x_headers/gel/
DSP281x_headers/gel/DSP281x_GpioQuickRef.gel
DSP281x_headers/gel/DSP281x_Peripheral.gel
DSP281x_headers/include/
DSP281x_headers/include/DSP281x_Adc.h
DSP281x_headers/include/DSP281x_CpuTimers.h
DSP281x_headers/include/DSP281x_DefaultIsr.h
DSP281x_headers/include/DSP281x_DevEmu.h
DSP281x_headers/include/DSP281x_Device.h
DSP281x_headers/include/DSP281x_ECan.h
DSP281x_headers/include/DSP281x_Ev.h
DSP281x_headers/include/DSP281x_Gpio.h
DSP281x_headers/include/DSP281x_Mcbsp.h
DSP281x_headers/include/DSP281x_PieCtrl.h
DSP281x_headers/include/DSP281x_PieVect.h
DSP281x_headers/include/DSP281x_Sci.h
DSP281x_headers/include/DSP281x_Spi.h
DSP281x_headers/include/DSP281x_SysCtrl.h
DSP281x_headers/include/DSP281x_Xintf.h
DSP281x_headers/include/DSP281x_XIntrupt.h
DSP281x_headers/include/f2812a.h
DSP281x_headers/include/stdio.h
DSP281x_headers/source/
DSP281x_headers/source/DSP281x_GlobalVariableDefs.c
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