Sparse presentation based classification with position-weighted block dictionary

2014 ◽  
Author(s):  
Jun He ◽  
Tian Zuo ◽  
Bo Sun ◽  
Xuewen Wu ◽  
Lejun Yu ◽  
...  
Keyword(s):  
Sparse Presentation

A Novel Anti-Jamming Driven Sparse Analysis-Based Spread Spectrum Communication Methodology

2018 ◽  
Vol 33 (01) ◽  
pp. 1958001 ◽  
Author(s):  
Wenzhun Huang ◽  
Zhe Liu ◽  
Lintao Lv ◽  
Liping Wang ◽  
Shanwen Zhang
Keyword(s):  
Spread Spectrum ◽  
Direct Sequence Spread Spectrum ◽  
Research Topic ◽  
Spread Spectrum Communication ◽  
Experimental Result ◽  
Direct Sequence ◽  
Analysis Framework ◽  
Communication Analysis ◽  
Spread Spectrum Modulation ◽  
Sparse Presentation

With the rapid and bursting development of communication engineering and some related techniques, spread spectrum communication and sparse analysis have been a hot research topic in the research community. A novel anti-jamming driven sparse analysis-based spread spectrum communication methodology is proposed in this paper, which mainly increases the spread spectrum modulation and the spread spectrum demodulation in the receiving end. The process of spread spectrum communication according to the working methods of different methodologies including direct-sequence spread spectrum. In this paper, the sparse presentation, dictionary learning, anti-jamming analysis and the basic communication theories are integrated altogether to enhance the traditional spread spectrum communication analysis framework. The experimental result proves the robustness of the proposed method.

A Regularized Locality Projection-Based Sparsity Discriminant Analysis for Face Recognition

2018 ◽  
Vol 32 (05) ◽  
pp. 1856006 ◽  
Author(s):  
Chuanbo Yu ◽  
Rencan Nie ◽  
Dongming Zhou
Keyword(s):  
Discriminant Analysis ◽  
Sparse Representation ◽  
Manifold Learning ◽  
Recognition Performance ◽  
Collaborative Representation ◽  
Scatter Matrix ◽  
Linear Discriminant ◽  
Face Images ◽  
Training Samples ◽  
Sparse Presentation

Manifold learning and classifiers based on sparse representation are widely used in pattern recognition. Most of the conventional manifold learning methods are subjected to the choice of parameters. In this paper, we present a Regularized Locality Projection based on Sparsity Discriminant Analysis (RLPSD) method for Feature Extraction (FE) to understand the high-dimensional data such as face images. In RLPSD, firstly, we show the sparse representation of training samples by collaborative representation-based classification (CRC). Secondly, the idea of part optimization based on sparse representation is used to ensure the within-class compactness which combines with the labels of measurements and the weights of sparse presentation can be as small as possible. Finally, whole optimization can be directly obtained without the iteration of local optimization. Meanwhile, the separability information of between-class can be well discriminated by scatter matrix which is similar to Fisher linear discriminant analysis (LDA). The great recognition performance of the proposed method is verified by comparing with the popular algorithms on Yale, ORL, AR and Extended YaleB face databases and Oxford 102 flowers dataset.

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