Radoš S. Dabić, Nenad S. Jovičić

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Presentation transcript:

Radoš S. Dabić, Nenad S. Jovičić Wireless Functional Electrical Stimulation System

Introduction FES considers use of electrical charge pulses to stimulate sensory or motor nerves in order to get controlled muscle contraction Variety of centralized FES systems and stimulators Distributed FES systems Flexible Displaced processing to powerful host computers Low complexity Wireless communication Reliability – minimizing transport delay Various wireless protocols in use nowadays

FES stimulator design Architecture of the system Block diagram of the stimulator unit Block diagram of the coordinator unit

Testbed Main task – reliability of data transfer Basic idea – precise bit-rate control at critical points Variable bit-rate Transmit power Combined gives longer range Design under test: Transmit power -16dBm Various bit-rates RSSI, LQI included 2-FSK signal modulation (@10kbps), MSK modulation (@100kbps, 250kbps, 500kbps)

Testing results (1)

Testing results (2)

Conclusion Bit-rate control is of interest for reliable communication in proposed FES system Precise bit-rate selection in critical situations Lower bit-rate in order to increase range and throughput of transmission link RSSI, LQI – help in bit-rate selection

THANK YOU FOR YOUR ATTENTION!