Intrusion detection
AssigneeHoneywell International Inc.
InventorsSrinivasaRao Katuri, Steve Huseth, Amit Kulkarni
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Abstract
Systems, methods, and devices for an intrusion detection system are described herein. For example, one or more embodiments include transmitting a DSSS signal, receiving a reflected DSSS signal from a target, correlating the reflected DSSS signal and the transmitted DSSS signal, and determining a distance to the target based on the correlation between the reflected DSSS signal and the transmitted DSSS signal.
Claims20
A method for intrusion detection, comprising:
- transmitting a direct sequence spread spectrum (DSSS) signal, wherein the signal includes a chipping sequence formed from multiple chips and wherein a chip length is a time between each of the chips and the chip length determines a time period corresponding to a phase delay;
- receiving a reflected DSSS signal from a target, via a receiver;
- determining the phase delay by correlating the reflected DSSS signal and the transmitted DSSS signal based upon comparison of the chipping sequences of the reflected DSSS signal and the transmitted DSSS signal;
- determining a distance to the target based on the phase delay between the reflected DSSS signal and the transmitted DSSS signal;
- and
- determining a location of the target based on an azimuth of the reflected DSSS signal and the distance to the target, wherein the azimuth of the reflected DSSS signal is an angle at which the receiver receives the reflected DSSS signal.
A machine-readable non-transitory medium storing instructions for intrusion detection, the instructions executable by a machine to cause the machine to:
- transmit a first direct sequence spread spectrum (DSSS) signal from a first point and a second DSSS signal from a second point, wherein each of the first DSSS signal and the second DSSS signal include a chipping sequence formed from multiple chips and wherein a chip length is a time between each of the chips and the chip length determines a first time period corresponding to a first phase delay and a second time period corresponding to a second phase delay;
- receive a reflection of the first DSSS signal from a target at the first point and a reflection of the second DSSS signal from the target at the second point;
- determine the first phase delay between the reflection of the first DSSS signal and the first transmitted DSSS signal based upon comparison of the chipping sequences of the reflected first DSSS signal and the transmitted first DSSS signal and the second phase delay between the reflection of the second DSSS signal and the second transmitted DSSS signal based upon comparison of the chipping sequences of the reflected second DSSS signal and the transmitted second DSSS signal;
- determine a position of the target based on the first and second phase delay and a distance between the first and second point;
- and
- determine an azimuth of the target based on the first and second point.
A system for intrusion detection, the system comprising a processing resource in communication with a non-transitory computer-readable medium, wherein the computer-readable medium contains a set of instructions and wherein the processing resource is designed to execute the set of instructions to:
- transmit a direct sequence spread spectrum (DSSS) signal with a transmitter, wherein the signal includes a chipping sequence formed from multiple chips and wherein a chip length is a time between each of the chips and the chip length determines a time corresponding to a phase delay;
- receive a reflected DSSS signal from a target with a receiver;
- generate a replica of the transmitted DSSS signal;
- determine the phase delay between the replica of the transmitted DSSS signal and the reflected DSSS signal based upon comparison of the chipping sequences of the reflected DSSS signal and the replica of the transmitted DSSS signal, and an azimuth of the reflected DSSS signal;
- and
- determine a position of the target based on the phase delay and the azimuth of the reflected DSSS signal, wherein the azimuth of the reflected DSSS signal is an angle at which the receiver receives the reflected DSSS signal.
Dependencies are inferred from the claim text.