Method and system for fast acquisition of ultra-wideband signals
AssigneeTime Domain Corporation
InventorsJames L. Richards, Mark D. Roberts
Life of this patent
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Abstract
A system and method are provided that can detect any part of a multipath impulse radio signal. More specifically, the method compares a template pulse train and the multipath impulse radio signal to obtain a comparison result. The system performs a threshold check on the comparison result. If the comparison result passes the threshold check, the system locks onto any part of the multipath impulse radio signal including a direct path part and at least one multipath reflection part. The system may also perform a quick check, a sychronization check, and/or a command check of the multipath impulse radio signal.
Claims34
A method for detecting an impulse radio signal, said method comprising the steps of:
- receiving the impulse radio signal;
- obtaining a template pulse train shifted by an offset;
- and
- locking onto the impulse radio signal when there is a substantial match between the template pulse train and the received impulse radio signal.
A method for detecting an impulse radio signal, said method comprising the steps of:
- (a) obtaining a received impulse radio signal;
- (b) obtaining a template pulse train;
- (c) comparing the template pulse train and the received impulse radio signal;
- (d) locking onto the received impulse radio signal if the comparison result meets an acceptance criterion;
- otherwise
- (e) obtaining a template pulse train shifted by an offset in accordance with a scanning process and repeating step (c) using the shifted template pulse train and the received impulse radio signal.
A receiver for detecting an impulse radio signal, comprising:
- an antenna for receiving the impulse radio signal;
- a generator for generating a template pulse train;
- and
- a controller and lock loop for comparing the template pulse train and the impulse radio signal and locking onto the impulse radio signal if the comparison result passes a threshold check;
- otherwise generating another template pulse train shifted by an offset in accordance with a scanning process and repeating the comparing step using the shifted template pulse train and the impulse radio signal.
A method for detecting an impulse radio signal, said method comprising the steps of:
- shifting a template pulse train by an offset in accordance with a scanning process, the scanning process defining a sequence of scan positions;
- obtaining a received impulse radio signal;
- comparing the template pulse train to a first portion of a first pulse train of the received impulse radio signal and to a second portion of a second pulse train of the received impulse radio signal in accordance with a received pulse train boundary based on one of the scan positions, the second pulse train of the received impulse radio signal immediately following the first pulse train of the received impulse radio signal;
- and
- locking on the received impulse radio signal when a comparison result meets an acceptance criterion;
- otherwise
- shifting the template pulse train by another offset in accordance with the scanning process and then repeating the comparing step.
A method for detecting an impulse radio signal, said method comprising the steps of:
- shifting a template pulse train by an offset based on an environment measurement;
- obtaining a received impulse radio signal;
- comparing the template pulse train and the received impulse radio signal;
- and
- locking on the received impulse radio signal when a comparison result meets an acceptance criterion;
- otherwise
- shifting the template pulse train by another offset in accordance with the scanning process and then repeating the comparing step.
Dependencies are inferred from the claim text.