A low-cost PC-based telemetry system for biomedical signals achieved sample rates up to 1.6 kHz, delay times below 100 ms, and bit error rates less than 10(-7) across various communications media.
A low-cost PC-based telemetry system demonstrated high-fidelity transmission of analogue biomedical signals over various telephone networks, suitable for telemedicine applications.
A low-cost, general-purpose telemetry system was developed for use in rural health centres, hospitals, ambulances and clinics. It was designed to transmit a range of analogue biomedical signals using various communications media. The system was tested using different telephone systems, including mobile telephony. The results showed a maximum sample rate of 1.6 kHz using the public telephone network. With three data channels the system produced sample rates of 500 Hz at 8 bit/sample. Typical overall delay times were below 100 ms. Mobile tests showed that the GSM telephone was superior to the Nordic mobile telephone (NMT 900). In field tests, sample rates of 990 Hz were obtained using GSM telephony. Bit error rates were less than 10(-7) for all applications and high-fidelity regeneration was obtained at the receiver. The tests showed that the system was well suited for telemetry of analogue biomedical signals in a broad range of telemedicine applications.
Bjørn Hofmann (Sun,) reported a other. PC-based biomedical signals telemetry unit was evaluated on System performance (sample rate, delay times, bit error rates). A low-cost PC-based telemetry system for biomedical signals achieved sample rates up to 1.6 kHz, delay times below 100 ms, and bit error rates less than 10(-7) across various communications media.