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US 10,371,799 B1Granted
Methods of calibration for radar apparatus
AssigneeDelta Mobile Systems, Inc
InventorsJames C Graves, Jr., Debra A Jones
Life of this patent
Estimating the term…
Abstract
A radar apparatus is calibrated while operating in a configuration such that the receiver obtains substantially no reflection from the transmitter. The resultant received signal is written into the compensation signal memory for use during normal operation. The calibration environment is achieved by operating the radar apparatus in a quiet environment or by operating a quieting switch within the radar apparatus to quiet the reflected radar signal.
Claims16
A method of calibrating a radar apparatus prior to any interpretation of a received radar signal, comprising the steps of:
- (a) deploying a radar apparatus configured to use a sweep signal for modulating a transmit signal and compensate a received radar signal based on a compensation signal;
- (b) operating a transmitter and a receiver of the radar apparatus in a quieted environment using one or more of i) a quiet space using absorptive material or ii) a dummy load connected to the transmitter or iii) a termination load connected to a receiver input of the receiver to quiet the receiver input;
- and
- (c) storing in a compensation signal memory of the radar apparatus essentially an entirety of the received signal as the compensation signal.
1 more element
A method of calibrating a radar apparatus,
- comprising the steps of:
- (a) deploying a radar apparatus with a quieting switch configured to use a sweep signal for modulating a transmit signal and compensate a received radar signal based on a compensation signal;
- (b) operating a transmitter and a receiver of the radar apparatus;
- (c) configuring the radar apparatus such that the receiver obtains substantially no reflection from the transmitter further comprising the steps of (c1) operating the quieting switch to quiet the reflected radar signal and (c2) measuring a received signal received by the receiver when essentially all transmit signals are quieted by operating the quieting switch of said step (c1);
- and
- (d) storing in a compensation signal memory of the radar apparatus essentially an entirety of the received signal as the compensation signal further comprising the step of (d1) adjusting the compensation signal previously stored in said step (d) based on a measurement of the received signal in step (c2);
- wherein said step (c1) of operating the quieting switch to quiet the reflected radar signal further comprises the step of (c1a) switching the radar signal from the transmitter to a dummy load to absorb essentially an entirety of the radar signal;
- and
- wherein said step (d1) of adjusting the compensation signal previously stored further comprises the step of (d1a) adjusting the compensation signal previously stored in said step (d) based on a measurement of the received signal when said step (c1a) switches the transmit signal to absorb essentially an entirety of the radar signal.
6 more elements
A method of calibrating a radar apparatus,
- comprising the steps of:
- (a) deploying a radar apparatus with a quieting switch configured to use a sweep signal for modulating a transmit signal and compensate a received radar signal based on a compensation signal;
- (b) operating a transmitter and a receiver of the radar apparatus;
- (c) configuring the radar apparatus such that the receiver obtains substantially no reflection from the transmitter further comprising the steps of (c1) operating the quieting switch to quiet the reflected radar signal and (c2) measuring a received signal received by the receiver when essentially all transmit signals are quieted by operating the quieting switch of said step (c1);
- and
- (d) storing in a compensation signal memory of the radar apparatus essentially an entirety of the received signal as the compensation signal further comprising the step of (d1) adjusting the compensation signal previously stored in said step (d) based on a measurement of the received signal in step (c2);
- wherein said step (c1) of operating a quieting switch to quiet the reflected radar signal further comprises the step of (c1a) switching the radar apparatus receiver to a termination load to quiet essentially an entirety of the reflected radar signal;
- and
- wherein said step (d1) of adjusting the compensation signal previously stored further comprises the step of (d1a) adjusting the compensation signal previously stored in said step (d) based on a measurement of the received signal when said step (c1a) switches to a termination load to quiet essentially an entirety of the reflected radar signal.
6 more elements
Dependencies are inferred from the claim text.