Method and apparatus for maximum permissible exposure proximity sensor fault detection
Techniques are provided which may be implemented using various methods and/or apparatuses in a mobile device to address maximum permissible exposure (MPE) proximity sensor failure. A mobile device may include a maximum permissible exposure (MPE) sensor control unit to actively monitor signals associated with proper operation of the MPE proximity sensors. Upon detecting an anomaly in any of these signals, such as a value drop below a given threshold, an MPE sensor control Unit will inform an AP (application processor, or other processor or controller) which in turn trigger display of a warning message on the display of the mobile device or the issuance of other warnings such an audible or tactile alert to inform the end user about the maximum permissible exposure (MPE) proximity sensor malfunction and/or notify the end use of a condition resulting in deactivation of the 5G new radio transceiver.
1. A method of detecting a failure in a maximum permissible exposure (MPE) proximity sensor, comprising:
mixing an intermediate frequency (IF) signal with an output from the MPE proximity sensor;
generating signals that are transmitted to detect reflecting objects;
monitoring the generated signals;
determining, based upon the monitored generated signals, that the MPE proximity sensor is not functioning; and
issuing an MPE proximity sensor failure alert.
2. The method of claim 1 , wherein the monitored generated signals are measured at an output of a power amplifier (PA).
3. The method of claim 1 , wherein the monitored generated signals are measured at a receive chain.
4. The method of claim 3 , wherein the monitored generated signals measured at the receive chain are the generated signals coupled from the transmit chain to the receive chain.
5. The method of claim 1 , wherein the determining, based upon the monitored generated signals, that the MPE proximity sensor is not functioning is based upon a change in signal parameters.
6. The method of claim 5 , wherein the change in signal parameters is detected based upon a predetermined threshold.
7. The method of claim 1 , wherein the MPE proximity sensor utilizes radio detection and ranging (RADAR).
8. A mobile device for detecting a failure in a maximum permissible exposure (MPE) proximity sensor, comprising:
at least one memory;
at least one wireless transceiver;
the MPE proximity sensor; and
a processor, communicatively coupled to the at least one memory, the at least one wireless transceiver and the MPE proximity sensor, configured to:
mix an intermediate frequency (IF) signal with an output from the MPE proximity sensor;
generate signals that are transmitted to detect reflecting objects;
monitor the generated signals;
determine, based upon the monitored generated signals, that the MPE proximity sensor is not functioning; and
issue an MPE proximity sensor failure alert.
9. The mobile device of claim 8 , wherein the monitored generated signals are measured at an output of a power amplifier (PA).
10. The mobile device of claim 8 , wherein the monitored generated signals are measured at a receive chain.
11. The mobile device of claim 10 , wherein the monitored generated signals measured at the receive chain are the generated signals coupled from the transmit chain to the receive chain.
12. The mobile device of claim 8 , wherein the determination, based upon the monitored generated signals, that the MPE proximity sensor is not functional, is based upon a change in signal parameters.
13. The mobile device of claim 12 , wherein the change in signal parameters is detected based upon a predetermined threshold.
14. The mobile device of claim 8 , wherein the MPE proximity sensor utilizes radio detection and ranging (RADAR).
15. A mobile device for detecting a failure in a maximum permissible exposure (MPE) proximity sensor, comprising:
means for mixing an intermediate frequency (IF) signal with an output from the MPE proximity sensor;
means for generating signals that are transmitted to detect reflecting objects;
means for monitoring the generated signals;
means for determining, based upon the monitored generated signals, that the MPE proximity sensor is not functioning; and
means for issuing an MPE proximity sensor failure alert.
16. The mobile device of claim 15 , wherein the monitored generated signals are measured at an output of a power amplifier (PA).
17. The mobile device of claim 15 , wherein the monitored generated signals are measured at a receive chain.
18. The mobile device of claim 17 , wherein the monitored generated signals measured at the receive chain are the generated signals coupled from the transmit chain to the receive chain.
19. A non-transitory computer-readable medium, having stored thereon computer-readable instructions to cause a processor on a mobile device to:
mix an intermediate frequency (IF) signal with an output from the MPE proximity sensor;
generate signals that are transmitted to detect reflecting objects;
monitor the generated signals;
determine, based upon the monitored generated signals, that the MPE proximity sensor is not functioning; and
issue an MPE proximity sensor failure alert.