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Neural Netw. 2007 Mar;20(2):274-84. Epub 2006 Dec 20.

Self-organizing maps with dynamic learning for signal reconstruction.

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  • 1Computational NeuroEngineering Lab., University of Florida, Gainesville, FL 32611, United States.


Wireless Brain Machine Interface (BMI) communication protocols are faced with the challenge of transmitting the activity of hundreds of neurons which requires large bandwidth. Previously a data compression scheme for neural activity was introduced based on Self Organizing Maps (SOM). In this paper we propose a dynamic learning rule for improved training of the SOM on signals with sparse events which allows for more representative prototype vectors to be found, and consequently better signal reconstruction. This work was developed with BMI applications in mind and therefore our examples are geared towards this type of signals. The simulation results show that the proposed strategy outperforms conventional vector quantization methods for spike reconstruction.

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