Physiological data communication system

• US 5,718,234 A
• Filed: 09/30/1996
• Issued: 02/17/1998
• Est. Priority Date: 09/30/1996
• Status: Expired due to Fees

• Current Assignee: Northrop Grumman Corporation
• Original Assignee: Northrop Grumman Corporation
• Inventors: Alley, Daniel M., Warden, Stephen Nevin
• Primary Examiner(s): GETZOW, SCOTT M
• Application Number:
  US08/724,258
• Time in Patent Office: 505 Days
• Field of Search: 128/903, 128/904, 128/696, 370/95.1, 375/1
• US Class Current: 600/300
• CPC Class Codes: A61B 5/0006 ECG or EEG signals
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

The present invention provides for a communication system for conveying biomedical data between a plurality of patient monitors and a centralized base station. The communication system includes a plurality of base transceivers within the base station. Each of the base transceivers is coupled with a dedicated transmit antenna and a dedicated receive antenna. The communication system additionally includes a plurality of remote transceivers each coupled with one of the patient monitors. Each of the remote transceivers communicates with a respective base transceiver. Each of the base transceivers may be interconnected via a common bus. The base transceivers and remote transceivers each have at least one tuning device controlled by a microcontroller for varying the center frequency thereof according to a hop sequence. The communication system may include a forward error correction device, a scrambler and a modem for providing GMSK modulation of the biomedical data.

Claims

1. A communication system for conveying biomedical data between a plurality of patient monitors and a centralized base station, comprising:

a transmit antenna;

a receive antenna separated from said transmit antenna;

a plurality of base transceivers within said base station;

means including a single transmit port coupling said base transceivers of said plurality to said transmit antenna;

means including a single receive port coupling said base transceivers of said plurality to said receive antenna;

a plurality of remote transceivers each coupled with one of said patient monitors and corresponding to a respective one of said base transceivers for communicating biomedical data therewith;

said base transceivers and said remote transceivers each having at least one tuning device for varying the center frequency thereof and a microcontroller coupled with each of said at least one tuning device for controlling the varying of the center frequency according to a hop sequence.

2. The communication system of claim 1 wherein said hop sequence of each of said remote transceivers corresponds to said hop sequence of said respective one of said base transceivers.

3. The communication system of claim 1 wherein said hop sequence of each of said base transceivers is orthogonal to said hop sequence of other said base transceivers.

4. The communication system of claim 1 wherein each frequency in said hop sequence is separated from other frequencies therein by at least about 50 kHz.

5. The communication system of claim 1 wherein each said base transceiver and each said remote transceiver is coupled with a forward error correction device for reducing errors within said biomedical data.

6. The communication system of claim 1 wherein each said base transceiver and each said remote transceiver is coupled with a scrambler for one of scrambling and descrambling said biomedical data.

7. The communication system of claim 6 wherein said scrambling removes bit redundancy within said biomedical data.

8. The communication system of claim 1 wherein each said base transceiver and each said remote transceiver is coupled with a modem for one of modulating and demodulating said biomedical data.

9. The communication system of claim 8 wherein said modem provides GMSK modulation and GMSK demodulation of said biomedical data.

10. The communication system of claim 1 wherein said tuning devices are phase lock loops.

11. The communication system of claim 1 further comprising a bus for interconnecting each of said base transceivers and said base station.

12. A communication system for conveying biomedical data between a plurality of patient monitors and a centralized base station, comprising:

a transmit antenna;

a receive antenna separated from said transmit antenna;

a plurality of base transceivers within said base station;

means including a single transmit port coupling said base transceivers of said plurality to said transmit antenna;

means including a single receive port coupling said base transceivers of said plurality to said receive antenna;

a plurality of remote transceivers each coupled with one of said patient monitors and corresponding to a respective one of said base transceivers for communicating biomedical data therewith;

said base transceivers and said remote transceivers each having at least one tuning device for varying the center frequency thereof and a microcontroller coupled with each of said at least one tuning device for controlling the varying of the center frequency according to a hop sequence;

said hop sequence of each of said remote transceivers corresponds to said hop sequence of said respective one of said base transceivers and said hop sequence of each of said base transceivers is orthogonal to said hop sequence of other said base transceivers.

13. The communication system of claim 12 wherein each frequency in said hop sequence is separated from other frequencies therein by at least about 50 kHz.

14. The communication system of claim 13 wherein each said base transceiver and each said remote transceiver is coupled with a forward error correction device for reducing errors within said biomedical data.

15. The communication system of claim 14 wherein each said base transceiver and each said remote transceiver is coupled with a scrambler for one of scrambling and descrambling said biomedical data.

16. The communication system of claim 15 wherein said scrambling removes bit redundancy within said biomedical data.

17. The communication system of claim 16 wherein each said base transceiver and each said remote transceiver is coupled with a modem for one of modulating and demodulating said biomedical data.

18. The communication system of claim 17 wherein said modem provides GMSK modulation and GMSK demodulation of said biomedical data.

19. The communication system of claim 18 wherein said tuning devices are phase lock loops.

20. The communication system of claim 19 further comprising a bus for interconnecting each of said base transceivers and said base station.