Dissertation > Excellent graduate degree dissertation topics show
Research on Algorithms of Signal Reconstruction and Classification Based on Compressive Sensing
Author: LinLin
Tutor: JiHongBing
School: Xi'an University of Electronic Science and Technology
Course: Signal and Information Processing
Keywords: Compressive Sensing Generalized Directional S Transform Signal Reconstruction Supervised Classification Algorithm
CLC: TN911.7
Type: Master's thesis
Year: 2012
Downloads: 349
Quote: 0
Read: Download Dissertation
Abstract
Compressive Sensing which develops from the fundamental premise named sparserepresentation, breaking the normal pattern in the traditional signal processing of firstsampling and then compress, using the sampling rate which is far below the request ofShannon theorem to sampling the signal when the compression is finished at the sametime. It is a new frame of signal processing cutting down the cost of sampling、storageand process. Based on the theory of Compressive Sensing, this dissertation focuses onthe research of various algorithms for the signal reconstruction and classification, aswell as choose the S transform as the timefrequency filtering tool for the denoisingpretreatment, in the purpose of reducing the impact of the noise on the signalreconstruction and classification.For signal denoising, propose the generalized directional S transform byintroducing the varyingtendency window and the directional parameter, and thenincorporating spectral subtraction and threshold processing proposes the denoisingmethod based on the generalized directional S transform. The experimental resultsvalidate the advantage of the proposed method over denoising, taking it further, theproposed method can provide effective denoising pretreatment for the subsequentreconstruction and classification.For signal reconstruction based on the CS, analysis and comparisons are made tothe classical signal reconstruction algorithms, including Iteratively Reweighted LeastSquares in the convex relaxation, Matching Pursuit、Orthogonal Matching Pursuit、Compressive Sampling Matching Pursuit and Subspace Pursuit in the greedy pursuitalgorithm. Experiments validate the feasibility of the signal reconstruction methodbased on CS、the superiority of the transform matrix which train from the KSVDalgorithm、 the improvement of the reconstruction probability with the proposeddenoising method.For signal classification based on the CS, for the drawbacks of the traditionalreconstruction algorithms that it only can be applied to the unsupervised classification,due to the reason that its objective function only consists of reconstruction error itemand sparse item, propose a supervised classification algorithm applied to signalclassification by introducing the Fisher discrimination item into the object function.Further, for the limitation of the SKSVD that different classes may be have intersection, obtaine the MSKSVD algorithm by modifying the atom set of the SKSVD, in whichdifferent classes have mutually disjunct atom sets, while the atom in the same class islinear independence. The experimental results show the superiority of the MSKSVDover classification performance compared with other algorithm, and the robustness ofthe MSKSVD to different parameter、training set rate、sparse dimension and the SNR.

Related Dissertations
 Algorithm Research on SINS/GPS Integrated Navigation Syste,V249.328
 Compressive Sensing of the Speech Signal and Its Application in Speech Coding,TN912.3
 The Research of Adaptively Sparsity in the Matching Pursuit Algorithm,TN911.7
 Research on Channel Estimation for OFDM System,TN919.3
 Application of Compressive Sensing to FBMC in Cognitive Radio System,TN925
 Airborne Radar Clutter Simulator,V243.2
 A new biological sonar guide the blind instrument of Research and Development,TH789
 Research on Image Reconstruction Algorithms Based on Compressive Sensing,TP391.41
 Research on Algorithms for ConeBeam CT Image Reconstruction from LimitedView Projections,TP391.41
 Sparse Scene Synthetic Aperture Radar Image Compression,TN957.52
 DOA Estimation Based on Compressive Sensing,TN911.7
 Research of Distributed Compressive Sensing Based on Unbalanced Expander,TN929.5
 Research of Data Compression Method Based on Compressive Sensing in Wireless Sensor Networks,TN929.5
 Spectrum sensing based on compressed sampling algorithm,TN925
 Exact Reconstruction Based on the Prior Knowledge of the Unkown Signal,O224
 Research on Image Acquision and ReconstructionBased on Compressive Sensing,TP391.41
 Research on Compressive Sensing Signal Reconstruction by Convex Optimization,TN911.7
 Research on Detection and Imaging of Ground Moving Target with Airborne Synthetic Aperture Radar,TN958
 Wireless Sensor Network Localization Based on Rangefree Technique,TN929.5
 Face Recognition Based on Compressed Sensing Theory,TP391.41
 The Structure of One Class of Signal Compression Algorithm,TP301.6
CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication theory > Signal processing
© 2012 www.DissertationTopic.Net Mobile
