The temporal variation of spatial correlation between on-body radio links is empirically characterized for different walking scenarios. Nonstationary behaviors are highlighted, and a model is proposed for the long-term fading correlation.
Pasquero, O. P., Rosini, R., DaErrico, R., & Oestges, C. (2015). A Correlation Model for Nonstationary Time-Variant On-Body Channels. IEEE Antennas and Wireless Propagation Letters, 14(14), 1294-1297. https://doi.org/10.1109/LAWP.2015.2403237 (Original work published 2015)