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Radoš S. Dabić, Nenad S. Jovičić

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

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Radoš S. Dabić, Nenad S. Jovičić

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

  2. 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

  3. FES stimulator design • Architecture of the system • Block diagram of the stimulator unit • Block diagram of the coordinator unit

  4. 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)

  5. Testing results (1)

  6. Testing results (2)

  7. 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

  8. THANK YOU FOR YOUR ATTENTION!

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