Systems Engineering and Electronics ›› 2022, Vol. 44 ›› Issue (2): 357-364.doi: 10.12305/j.issn.1001-506X.2022.02.01

• Electronic Technology •     Next Articles

Design of optimal sampling set for bandlimited graph signal

Xuan XIE1, Hui FENG1,*, Bo HU1, Dan LI1,2   

  1. 1. Research Center of Smart Networks and Systems, Fudan University, Shanghai 200433, China
    2. Shanghai Key Laboratory of Aerospace Intelligent Control Technology, Shanghai 200433, China
  • Received:2020-10-19 Online:2022-02-18 Published:2022-02-24
  • Contact: Hui FENG

Abstract:

For the limitation of manpower or the equipment, we design a sampling set for multi-stage graph signal sampling. Given sampling budget constraints, the design of the sampling set aims to minimize the estimation error. We formulate the design of sampling set as an optimization problem and find the suboptimal solution by a relaxation-quantization approach. The applying condition and the asymptotic optimality of our approach are also proposed. Different from the existing methods, in addition to obtaining the optimal sampling set, we analyze the factors affecting the importance of vertices in sampling. Meanwhile, the metric of sampling importance and some insights into it are also given. Finally, a low-complexity approximation algorithm is proposed for large-scale graph signal sampling. The algorithm approaches the optimal solution efficiently.

Key words: graph signal, sampling theory, experimental design

CLC Number: 

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