吉林大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (4): 1209-1214.doi: 10.13229/j.cnki.jdxbgxb201404047

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Non-uniform information acquisition and reconstruction within compressed sensing framework

TIAN Wen-biao, RUI Guo-sheng, ZHANG Hai-bo, WANG Lin   

  1. Key Laboratory of Signal and Information Processing in Shandong Province, Naval Aeronautical and Astronautical University, Yantai 264001, China
  • Received:2013-02-06 Online:2014-07-01 Published:2014-07-01

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Abstract: The existing Analog to Information Conversation (AIC) is based on uniform-low-rate information measurement, and the importance prior information contained in the signal is underused. Under the energy criterion, a Non-Uniform Information Acquisition (NUIA) method is proposed. After random modulation, the signal is sampled at non-uniform-rate that the bigger the energy is the higher the sampling rate is and vice versa. Combing the idea of support merger with pruning, a Variable Rate Matching Pursuit (VRMP) algorithm is proposed. The prior support set, which is united with the set of signal appropriation support, is able to promote the recovery accuracy. Compared with the Subspace Pursuit (SP) reconstruction of conventional AIC, the combination of NUIA-VRMP can obtain 50dB reconstruction gain at ultra-low-rate, (e. g. 20% Nyquist Rate).

Key words: information processing technology, analog to information conversion, compressed sensing, reconstruction algorithm, non-uniform sampling

CLC Number: 

  • TN911.72
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