A high data-rate wireless receiver for implantable biomedical devices
An external device for receiving radio frequency (RF) encoded neurological signals is presented. RF-encoded neurological signals often require high data-rates to transmit from multiple electrodes with 10-bit resolution per channel. The transmission frequency is a frequency-shift key (FSK) modulated, 2.45 GHz signal with a 100 MHz bandwidth. The external receiver demodulates the transmission at speeds up to 8 Mbps, with >10-5 bit-error rate (BER), and possesses the flexibility to demodulate FSK and on/off key (OOK) signals. Down-conversion to a 120 MHz IF frequency provides lower power amplification and filtering. An implantable transmitter consuming ∼0.7 mW is used for in vivo validation. Transmitter/Receiver link BER is quantified in typical and controlled RF environments for ex vivo and in vivo performance. The receiver is tested with the transmitter in vivo to prove demodulation efficacy at high data-rates.^
Pedro P. Irazoqui, Purdue University.
Engineering, Biomedical|Engineering, Electronics and Electrical