Management of coexistence of communicating sub-systems in wireless devices
A method of calibrating coexistence of several wirelessly communicating sub-systems within a wireless device wherein the wirelessly communicating sub-systems comprise several transmitters and several receivers which are interconnected through one or more interfaces, the method comprising:—activating one of the transmitters while maintaining the other transmitters off by causing said transmitter to transmit a first signal with a known set of characteristics;—measuring unwanted signal received at each receiver and originating from a coupling of said receivers with the activated transmitter;—storing coupling data derived from each of the measured unwanted signals in relation with the set of signal characteristics of the first signal and/or a set of unwanted signal characteristics, whereby forming a calibration database for adjusting operation of one or more transmitters and/or receivers to manage the coexistence of the plurality of wirelessly communicating sub-systems during normal operation of the wireless device.
1. A method of calibrating coexistence of a plurality of wirelessly communicating sub-systems within a wireless device wherein the plurality of wirelessly communicating sub-systems comprises a plurality of transmitters and a plurality of receivers which are interconnected through one or more interfaces, the method comprising:
activating a single one of the transmitters while maintaining the other transmitters off by causing said transmitter to transmit a first signal with a known set of characteristics;
measuring unwanted signal received at each of the plurality of receivers and originating from a coupling of said receivers with the activated transmitter;
storing coupling data derived from each of the measured unwanted signals in relation with the set of signal characteristics of the first signal and/or a set of unwanted signal characteristics, whereby forming a calibration database usable for adjusting operation of one or more of the plurality of transmitters and/or receivers to manage the coexistence of the plurality of wirelessly communicating sub-systems during normal operation of the wireless device; and
wherein the activating, measuring and storing are repeated for each of the plurality of transmitters.
2. The method of claim 1 , wherein the plurality of sub-systems operates respective communication technology.
3. The method of claim 1 , wherein the measuring of unwanted signal comprises measuring received signal strength indication (RSSI).
4. The method of claim 1 , wherein the coupling data is equal to the difference between the unwanted signal and a noise floor for said receiver defined as the level of noise received when none of the plurality of transmitters is activated.
5. The method of claim 1 , wherein the set of signal characteristics comprises at least one of signal power level, signal frequency and signal modulation scheme.
6. The method of claim 1 wherein the adjusting operation comprise performing at least one of:
adjusting signal power level, signal frequency and/or signal modulation scheme of at least the transmitter;
causing a receiver to drop the received data; and/or,
causing a receiver to be deactivated.
7. An apparatus for calibrating coexistence of a plurality of wirelessly communicating sub-systems within a wireless device wherein the plurality of wirelessly communicating sub-systems comprises a plurality of transmitters and a plurality of receivers which are interconnected through one or more interfaces, the apparatus comprising:
a unit configured for activating a single one of the transmitters while maintaining the other transmitters off by causing said transmitter to transmit a first signal with a known set of characteristics;
a unit configured for measuring unwanted signal received at each of the plurality of receivers and originating from a coupling of said receivers with the activated transmitter;
a unit configured for storing coupling data derived from each of the measured unwanted signals in relation with the set of signal characteristics of the first signal and/or a set of unwanted signal characteristics, whereby forming a calibration database usable by a unit configured for adjusting operation of one or more of the plurality of transmitters and/or receivers to manage the coexistence of the plurality of wirelessly communicating sub-systems during normal operation of the wireless device; and
wherein the activating, measuring and storing are repeated for each of the plurality of transmitters.
8. The apparatus of claim 7 , wherein the plurality of subsystems operates respective communication technology.
9. The apparatus of claim 7 , wherein the measuring of unwanted signal comprises measuring received signal strength indication.
10. The apparatus of claim 7 , wherein the coupling data is equal to the difference between the unwanted signal and a noise floor for said receiver defined as the level of noise received when none of the plurality of transmitters is activated.
11. The apparatus of claim 7 , wherein the set of signal characteristics comprises at least one of signal power level, signal frequency and signal modulation scheme.
12. The apparatus of claim 7 , wherein the adjusting operation comprise performing at least one of:
adjusting signal power level, signal frequency and/or signal modulation scheme of at least the transmitter;
causing a receiver to drop the received data; and/or,
causing a receiver to be deactivated.
13. A wireless device comprising an apparatus as claimed in claim 7 .