RADAR DETECTOR FREQUENCY DISTURBANCE SENSOR FILTERING SYSTEM AND METHOD
A method to determine the presence of frequency-modulated continuous wave (FMCW) radar with user-selectable rejection of radar signals or modification of alert modes based on detection of radar signals of minimal interest.
1 . A method for confirming the presence of frequency-modulated continuous wave radar signal during continuous wave police radar detection operation, comprising the steps of:
scanning a frequency band between a first frequency and a second frequency;
detecting a first radar signal;
interrupting the continuous wave police radar detection operation; and
confirming that the detected radar signal is not a frequency-modulated continuous wave radar signal.
2 . The method according to claim 1 , wherein the interrupted continuous wave police radar detection operation is a sweep occurring in a vicinity of the detected radar signal to determine an average rate of the frequency-modulated continuous wave radar signal.
3 . The method according to claim 2 , wherein the average rate of the frequency-modulated continuous wave signal is determined by pulses detected during an interruption period.
4 . The method according to claim 2 , wherein the first detected radar signal comprises a two-pulse signal signature.
5 . The method according to claim 2 , wherein the first identified radar signal comprises a single-pulse signal signature.
6 . The method of claim 1 , further comprising:
alerting a user that a continuous wave radar signal has been detected; and
resuming continuous wave radar detection operation.
7 . The method of claim 1 , wherein the confirmation that the detected signal is not a frequency-modulated continuous wave radar signal occurs when no signal is detected during interruption of continuous wave radar detection operation.
8 . The method of claim 6 , wherein the alerting comprises a visual indication of detection of a continuous wave radar signal.
9 . The method of claim 6 , wherein the alerting comprises an audio indication of detection of a continuous wave radar signal.
10 . A method of informing an operator of a vehicle of the presence of a frequency disturbance sensor device emitting a frequency-modulated continuous wave radar signal, the method comprising the steps of:
detecting a frequency-modulated continuous wave radar signal;
calculating an average rate of the radar signal;
comparing the average rate of the radar signal to a predetermined threshold rate; and
modifying a mode of alerting the operator of the presence of the radar signal according to the calculated average rate.
11 . The method of claim 10 , wherein the radar signal is determined to be an unwanted signal if the average rate of the signal is less than a predetermined threshold value.
12 . The method of claim 10 , wherein the radar signal is determined to be a signal of interest if the average rate of the signal is greater than a predetermined threshold value.
13 . The method of claim 10 , wherein the radar signal is determined to be an unwanted signal if the average rate of the signal is greater than a predetermined threshold value.
14 . The method of claim 10 , wherein the radar signal is determined to be a signal of interest if the average rate of the signal is less than a predetermined threshold value.
15 . The method of claim 10 , wherein the modified mode of alerting the user comprises a silent mode.
16 . The method of claim 10 , wherein the modified mode of altering the user comprises a unique abbreviated audio alert mode.
17 . The method of claim 10 , wherein the modified mode of altering the user comprises a unique visual alert mode.
18 . The method of claim 17 , wherein the visual alert mode includes presenting the operator with unique a textual indicator via a light emitting diode (LED) display.
19 . The method of claim 17 , wherein the visual alert mode includes presenting the operator with a unique numerical indicator via a light emitting diode (LED) display.
20 . The method of claim 17 , wherein the visual alert mode includes presenting the operator with a unique icon indicator.
21 . A system for confirming the presence of a frequency disturbance sensor device emitting a frequency-modulated continuous-wave radar signal, comprising:
a housing;
an antenna; and
at least one controller configured to:
scan a frequency band between a first frequency and a second frequency according to a first mode of operation to detect a continuous wave radar signal;
interrupt the scan after a first radar signal is detected; and
determine according to a second mode of operation whether the first radar signal is a frequency-modulated continuous wave radar signal.
22 . The system of claim 21 , wherein the interrupted scan occurs in a vicinity of the detected radar signal to determine an average rate of the frequency-modulated continuous wave radar signal.
23 . The system of claim 22 , wherein the average rate of the frequency-modulated continuous wave signal is determined by pulses detected during the interruption of the scan.
24 . The system of claim 21 , wherein the first detected radar signal comprises a two-pulse signal signature.
25 . The system of claim 21 , wherein the first identified radar signal comprises a single-pulse signal signature.
26 . The system of claim 21 , wherein the controller is further configured to:
alert a user that a continuous wave radar signal has been detected; and
resuming the first mode of operation following the determination of whether the first radar signal is a frequency-modulated continuous wave radar signal.
27 . The system of claim 21 , wherein the determination that the detected signal is not a frequency-modulated continuous wave radar signal occurs when no signal is detected during interruption of the scan.
28 . The system of claim 21 , wherein the determination that the detected signal is a frequency-modulated continuous wave radar signal occurs when a second radar signal is detected during interruption of the scan.
29 . The system of claim 26 , wherein the alert comprises a visual indication of detection of a continuous wave radar signal.
30 . The system of claim 26 , wherein the alert comprises an audio indication of detection of a continuous wave radar signal.
31 . The system of claim 26 , wherein the controller is further configured to:
calculate an average rate of the frequency-modulated continuous wave radar signal;
compare the average rate of the frequency-modulated continuous wave radar signal to a predetermined threshold rate; and
modify a mode of alerting the user of the presence of the first radar signal according to the calculated average rate.
32 . The system of claim 31 , wherein the first radar signal is determined to be an unwanted signal if the average rate of the signal is less than a predetermined threshold value.
33 . The system of claim 31 , wherein the radar signal is determined to be a signal of interest if the average rate of the signal is greater than a predetermined threshold value.
34 . The system of claim 31 , wherein the radar signal is determined to be an unwanted signal if the average rate of the signal is greater than a predetermined threshold value.
35 . The system of claim 31 , wherein the radar signal is determined to be a signal of interest if the average rate of the signal is less than a predetermined threshold value.
36 . The system of claim 31 , wherein the modified mode of alerting the user comprises a silent mode.
37 . The system of claim 31 , wherein the modified mode of altering the user comprises a unique abbreviated audio alert mode.
38 . The system of claim 31 , wherein the modified mode of altering the user comprises a unique visual alert mode.
39 . The system of claim 38 , wherein the visual alert mode includes presenting the operator with unique a textual indicator via a light emitting diode (LED) display.
40 . The system of claim 38 , wherein the visual alert mode includes presenting the operator with a unique numerical indicator via a light emitting diode (LED) display.
41 . The system of claim 38 , wherein the visual alert mode includes presenting the operator with a unique icon indicator.