• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
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Volume 19 Issue 4
Aug.  2006
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Article Contents
SHAO Jun, YIN Zhongke, WANG Jianying. Improved FFT-Based MP Algorithm for Signal Sparse Decomposition[J]. Journal of Southwest Jiaotong University, 2006, 19(4): 466-470.
Citation: SHAO Jun, YIN Zhongke, WANG Jianying. Improved FFT-Based MP Algorithm for Signal Sparse Decomposition[J]. Journal of Southwest Jiaotong University, 2006, 19(4): 466-470.

Improved FFT-Based MP Algorithm for Signal Sparse Decomposition

  • Received Date: 11 Apr 2005
  • Publish Date: 25 Aug 2006
  • An improved FFT(fast Fourier transformation) based MP(matching pursuit) algorithm was proposed to reduce the calculation load in signal sparse decomposition.In the algorithm,a radix-2 FFT is performed to calculate the crosscorrelation, because the calculation speed is the fastest when the length of the transform is of integral power of 2.Theoretical analysis shows that,for a digital signal with a length of 1 024,the speed of calculation of crosscorrelation using radix-2 FFT is 10.6 times as fast as that using direct calculation.Simulation results show that the calculation speed of the improved FFT based MP algorithm is 8.05 times as fast as that of direct calculation,and 3.64 times as fast as that of the FFT-based MP algorithm.

     

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