Digital spread spectrum methods and apparatus for testing aircraft wiring
AssigneeUtah State University
InventorsJacob Gunther, Deekshit Dosibhatla, Cynthia Furse
Life of this patent
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Abstract
A system and method that utilizes direct sequence spread spectrum signal (DSSS) encoding to enable testing of a live wire, wherein an original data signal is modified and then transmitted along the wire, and a reflected signal is collected and analyzed using correlation techniques to determine characteristics of the live wire, including the location of a fault.
Claims44
A method of determining impedance of a wire under test utilizing direct sequence spread spectrum (DSSS) techniques, said method comprising the steps of:
- (1) coupling the DSSS wire testing system to a connecting end of the wire under test;
- (2) obtaining a pseudo-random noise (PN) code;
- (3) multiplying a test signal by the PN code;
- (4) transmitting the multiplied test signal from the DSSS wire testing system to the wire under test;
- (5) receiving a reflected multiplied test signal from the wire under test;
- and
- (6) determining a length of the wire under test from the reflected multiplied test signal.
A method of using spread spectrum techniques for wire testing of a live wire, said method comprising the steps of:
- (1) generating a pseudo random code;
- (2) modifying a test signal using the code;
- (3) transmitting the modified test signal on the live wire, wherein the modified test signal has a signal strength that is comparable to noise on the live wire;
- (4) measuring a propagation delay of the modified test signal via the code;
- and
- (5) determining impedance of the live wire.
A method of using spread spectrum techniques for testing of a live wire, said method comprising the steps of:
- (1) generating a pseudo random code;
- (2) modifying a test signal using the pseudo random code;
- (3) spreading out the test signal for transmission on a live wire such that the spread test signal is comparable in strength to noise on the live wire;
- (4) transmitting the spread test signal on the live wire;
- (5) measuring a propagation delay of the spread test signal;
- and
- (6) determining impedance of the live wire.
Dependencies are inferred from the claim text.