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arXiv · 2505.05983

Architectural Exploration of Hybrid Neural Decoders for Neuromorphic Implantable BMI

Vivek Mohan·Biyan Zhou·Zhou Wang·Anil Bharath·Emmanuel Drakakis·Arindam Basu
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Abstract

This work presents an efficient decoding pipeline for neuromorphic implantable brain-machine interfaces (Neu-iBMI), leveraging sparse neural event data from an event-based neural sensing scheme. We introduce a tunable event filter (EvFilter), which also functions as a spike detector (EvFilter-SPD), significantly reducing the number of events processed for decoding by 192X and 554X, respectively. The proposed pipeline achieves high decoding performance, up to R^2=0.73, with ANN- and SNN-based decoders, eliminating the need for signal recovery, spike detection, or sorting, commonly performed in conventional iBMI systems. The SNN-Decoder reduces computations and memory required by 5-23X compared to NN-, and LSTM-Decoders, while the ST-NN-Decoder delivers similar performance to an LSTM-Decoder requiring 2.5X fewer resources. This streamlined approach significantly reduces computational and memory demands, making it ideal for low-power, on-implant, or wearable iBMIs.

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Vivek Mohan, Biyan Zhou, Zhou Wang, Anil Bharath, Emmanuel Drakakis, Arindam Basu. 2025-05-09. Architectural Exploration of Hybrid Neural Decoders for Neuromorphic Implantable BMI. https://arxiv.org/abs/2505.05983

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