2021 IEEE International Conference on Acoustics, Speech and Signal Processing

6-11 June 2021 • Toronto, Ontario, Canada

Extracting Knowledge from Information

2021 IEEE International Conference on Acoustics, Speech and Signal Processing

6-11 June 2021 • Toronto, Ontario, Canada

Extracting Knowledge from Information
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Paper Detail

Paper IDSPCOM-8.2
Paper Title DEEP GENERATIVE MODEL LEARNING FOR BLIND SPECTRUM CARTOGRAPHY WITH NMF-BASED RADIO MAP DISAGGREGATION
Authors Sagar Shrestha, Xiao Fu, Oregon State University, United States; Mingyi Hong, University of Minnesota, United States
SessionSPCOM-8: Deep learning for communications
LocationGather.Town
Session Time:Friday, 11 June, 14:00 - 14:45
Presentation Time:Friday, 11 June, 14:00 - 14:45
Presentation Poster
Topic Signal Processing for Communications and Networking: [SPC-ML] Machine Learning for Communications
IEEE Xplore Open Preview  Click here to view in IEEE Xplore
Abstract Spectrum cartography (SC) aims at estimating the multi-aspect (e.g., space and frequency) interference level caused by multiple emitters from limited measurements. Early SC approaches rely on model assumptions about the radio map, e.g., sparsity and smoothness, which may be grossly violated under critical scenarios, e.g., in the presence of severe shadowing. More recent data-driven methods train deep generative networks to distill parsimonious representations of complex scenarios, in order to enhance performance of SC. The challenge is that the state space of this learning problem is extremely large---induced by different combinations of key problem constituents, e.g., the number of emitters, the emitters' carrier frequencies, and the emitter locations. Learning over such a huge space can be costly in terms of sample complexity and training time; it also frequently leads to generalization problems. Our method integrates the favorable traits of model and data-driven approaches, which substantially `shrinks' the state space. Specifically, the proposed learning paradigm only needs to learn a generative model for the radio map of a single emitter (as opposed to numerous combinations of multiple emitters), leveraging a nonnegative matrix factorization (NMF)-based emitter disaggregation process. Numerical evidence shows that the proposed method outperforms state-of-the-art purely model-driven and purely data-driven approaches.