用于抗丢失数据轴承故障诊断的快速频率稀疏学习方法”的MATLAB代码 matlab代码.rar

Tunable Q-Factor Wavelet Transform (TQWT) Version 1.7 This is a MATLAB implementation of the tunable Q-factor wavelet transform (TQWT) described in the paper. An implementation in C, which runs faster than the MATLAB code, is available by request. See the guide: TQWT_guide.pdf for more complete information. For questions/comments/etc contact selesi@poly.edu Reference: 'Wavelet Transform with Tunable Q-Factor' IEEE Trans. on Signal Processing. 59(8):3560-3575, August 2011. http://eeweb.poly.edu/iselesni/TQWT/ http://taco.poly.edu/selesi/TQWT/ Ivan Selesnick selesi@poly.edu Polytechnic Institute of New York University Brooklyn, NY 11201, USA -------------------------------------------------- List of functions: tqwt_radix2.m Main function for the radix-2 TQWT itqwt_radix2.m Inverse radix-2 TQWT These functions use radix-2 FFTs only tqwt.m TQWT (First form of TQWT described in the TQWT paper) itqwt.m Inverse TQWT These functions are slower than tqwt_radix2 The radix-2 versions are preferred for practical use test_PR_radix2.m Verify perfect reconstruction properties test_PR.m demo1.m Illustrates the use of functions demo1_radix2.m sparsity_demo.m Reproduces Example 2 in the TQWT paper resonance_demo.m Demonstration of resonance decomposition tqwt_bp.m Sparse representation using basis pursuit (BP) tqwt_bpd.m Sparse approximation using basis pursuit denoising (BPD) dualQ Resonance decomposition (BP with dual Q-factors) dualQd Resonance decomposition (BPD with dual Q-factors) PlotFreqResps.m Plot frequency responses of the TQWT PlotSubbands.m Plot subbands computed using TQWT PlotEnergy Plot distribution of signal energy over subbands PlotWavelets.m Plot wavelets associated with TQWT ComputeWavelets.m Compute wavelets associated with TQWT ComputeNow.m Compute norms of wavelets tqwt_fc.m Center frequencies afb.m Analysis filter bank (called by tqwt and tqwt_radix2) sfb.m Synthesis filter bank (called by itqwt and itqwt_radix2) lps.m Low-pass scaling next.m Next power of two uDFT.m unitary DFT (normalized DFT) uDFTinv.m unitary inverse DFT (normalized inverse DFT) -------------------------------------------------- Versions version 1.7 Added mex files for more versions of Matlab version 1.6 Modify to handle complex data (mfiles) Correction to tqwt_bpd mex file Miscellaneous other minor changes version 1.5 April 15, 2011 Added mex files version 1.4 April 5, 2011 version 1.3 February 23, 2011 version 1.2 February 22, 2011 version 1.0 January 6, 2011