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Deep Generative Modeling for Communication Systems Testing and Data Sharing

Summary

This project aims to develop deep generative models, an emerging topic in AI, for radio frequency (RF) waveforms collected from real-world communications hardware.  This research will lead to cheaper, more realistic synthetic waveform generation for testing, modeling, and data sharing.  

Description

After initial investigations with simulated datasets, we plan to develop generative models using real datasets. Potential applications of this work include generation of waveforms for interference testing, characterization of closed-box communication systems, and signal obfuscation for data sharing. 

Objectives:

  1. Develop general-purpose deep generative models, e.g., generative adversarial networks (GANs), for modern radio frequency (RF) communication waveforms (e.g., LTE, Wi-Fi) and demonstrate their utility for laboratory-based interference testing.
  2. Collect and publish RF datasets of communication waveforms for model development. 
  3. Investigate generative models for data obfuscation to facilitate data sharing. 

Major Accomplishments

Completed:

  • RF dataset collections
  • Generative model development with simulated data 

In Progress:

  • Generative model development for real RF data.
  • Experimental assessment of efficacy of GAN-generated waveforms for laboratory-based interference testing on microwave point to point communication link.
  • Proof-of-concept demonstration of population obfuscation with generative models.
  • Publications
 

Preliminary Results: 

I/Q data segments of duration 17.07 ms, 30.72 MS/s sampling rate, visualized as 1024 x 1024 spectrograms 

Target Distribution Examples: Field captures of AWS-1 Band Uplink LTE (see NTIA Technical Report TR-21-553)

 

Targeted Gen Test 0
AI Targeted Example 2
AI Targeted 04

Generated Examples:

Generated Examples 0
AI Gen Test 5
Gen Example 4

Follow-on Research: Adaptive Closed-Box Interference Susceptibility Testing

  • Aim: Leverage machine learning for adaptive testing of closed-box commercial off-the-shelf (COTS) communication systems under dynamic conditions.

Publications:

  • J. Sklar, A. Wunderlich, “Feasibility of modeling orthogonal frequency-division multiplexing communication signals with unsupervised generative adversarial networks,” Journal of Research of National Institute of Standards and Technology Vol. 126, No. 126046, 2021. https://doi.org/10.6028/jres.126.046
  • A. Wunderlich, J.Sklar, “Learning noise with generative adversarial networks: Explorations with classical random process models,” submitted.  Preprint: https://arxiv.org/abs/2207.01110
  • S. Tschimben, S. Subray, A. Sanders, A. Wunderlich, “Collection methods for Wi-Fi and Bluetooth I/Q recordings in the 2.4 GHz and 5 GHz bands with low-cost software defined radios,” NIST Technical Note, in preparation.
  • M. Forsyth, D. Kuester, J. Sklar, A. Wunderlich, A. Sanders, “Recording LTE user equipment emissions as a function of resource block,” NIST Technical Note, in preparation.
  • M. Frey, A. Wunderlich, R. Hoover, K. Caudle, L. Koepke, D. Newton, “Population obfuscation: The problem and some solutions.” To appear in Proceedings of 2022 Joint Statistical Meetings (JSM). 

Software: 

  • J. Sklar, A. Wunderlich, “OFDM-GAN: Software for Modeling OFDM Communication Signals with Generative Adversarial Networks,” 2021. https://github.com/usnistgov/OFDM-GAN
  • J. Sklar, A. Wunderlich, “NoiseGAN: Software for Evaluating Convolutional Generative Adversarial Networks with Classical Random Process Noise Models,” 2022.  https://github.com/usnistgov/noisegan
 

Datasets:

  • Wi-Fi and Bluetooth I/Q recordings in the 2.4 GHz and 5 GHz bands with low-cost software-defined radios, in preparation. 
  • I/Q recordings of LTE user equipment emissions as a function of resource block, in preparation. 
 
Created March 23, 2021, Updated July 20, 2022