Adaptive, performance-optimizing communication system for communicating with an implanted medical device

• US 5,843,139 A
• Filed: 03/12/1997
• Issued: 12/01/1998
• Est. Priority Date: 01/11/1996
• Status: Expired due to Term

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Haubrich, Gregory J., Goedeke, Steven D., Thompson, David L., Keimel, John G.
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): LAYNO, CARL HERNANDZ
• Application Number:
  US08/816,223
• Time in Patent Office: 629 Days
• Field of Search: 607/60, 607/31, 607/32, 128/903
• US Class Current: 607/32
• CPC Class Codes: A61N 1/37223 Circuits for electromagnetic coupling
• CPC Class Codes: A61N 1/37247 User interfaces, e.g. input or presentation means
• CPC Class Codes: A61N 1/37254 Pacemaker or defibrillator security, e.g. to prevent or inhibit programming alterations by hackers or unauthorised individuals
• CPC Class Codes: A61N 1/3727 characterised by the modulation technique
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

An adaptive, performance-optimizing communication system for communicating with an implanted medical device in which signals are transmitted and received in accordance with predetermined, interrelated operational parameters, such as transmission rate, transmitter power, and the like. Various aspects of system performance, including bit error rate in received signals, the strength of received signals, the signal-to-noise ratio of received signals, the presence of local RF noise and non-telemetry related RF signals, and the like, are dynamically monitored by the communication system, to determine whether predetermined system performance goals are being met. If it is determined that one or more system performance goals are not being met, one or more operational parameters may be automatically adjusted so that desired performance can be achieved.

Claims

1. A system comprising an impulse radio transmitter and an impulse radio receiver, wherein said impulse radio transmitter comprises means for generating a pseudo-random baseband pulse stream and means for modulating said pseudo-random baseband pulse stream with data to be transmitted, such that for a first data state, at least one pulse in said pseudo-random baseband pulse stream is not transmitted and means for transmitting said modulated pseudo-random baseband pulse stream, wherein said modulating means comprises means for deleting a pulse from said generated pseudo-random pulse stream in order to transmit said first data state.

2. A system according to claim 1, wherein said modulating means comprises means for retaining a pulse in said generated pseudo-random pulse stream in order to transmit a second data state.

3. A system according to claim 1 or claim 2 wherein said impulse radio receiver comprises;

means for generating a pseudo-random pulse stream corresponding to said pseudo-random baseband pulse stream generated by said generating means of impulse radio transmitter;

means for receiving a modulated pseudo-random pulse stream from said impulse radio transmitter;

means for correlating a received modulated pseudo-random pulse stream from said impulse radio transmitter with the pseudo-random pulse stream generated by said generating means of said impulse radio receiver; and

means for recognizing lack of correlation between a pulse in the pseudo-random pulse stream generated by said generating means of said impulse radio receiver and the received modulated pseudo-random pulse stream from said impulse radio transmitter as indicative of said first data state.

4. A system according to claim 1 or claim 2 wherein said impulse radio receiver further comprises means for recognizing correlation between a pulse in the pseudo-random pulse stream generated by said generating means of said impulse radio receiver and the received modulated pseudo-random pulse stream from said impulse radio transmitter as indicative of said second data state.