Communication terminal and method for determining a power scaling factor
View Patent ↗A communication terminal is described comprising a receiver configured to receive first signals on a first set of communication resources and to receive a plurality of second signals on a second set of communication resources and an interference control unit configured to determine a level of interference of one or more interferers included in the plurality of second signals and to determine a power scaling factor of signal components of the first signals based on the level of interference by the one or more interferers.
1. A communication terminal comprising:
a receiver configured to receive a plurality of first signals on a first set of communication resources and to receive a plurality of second signals on a second set of communication resources; and
an interference control unit configured to determine a level of interference of one or more interferers included in the plurality of second signals and to determine a power scaling factor of a plurality of signal components of the plurality of first signals based on the level of interference by the one or more interferers, wherein the plurality of signal components of the plurality of first signals are signals sent to the communication terminal by a base station operating the serving radio cell.
2. The communication terminal according to claim 1 , wherein the interference control unit is further configured to cancel interference of the one or more interferers included in the first signals using the level of interference.
3. The communication terminal according to claim 1 , wherein the interference control unit is configured to cancel influence of interference of the one or more interferers on reception power of the first set of communication resources using the level of interference on the second set of communication resources.
4. The communication terminal according to claim 1 , wherein the level of interference on the second set of communication resources is a power level of interference and determining the power scaling factor comprises subtracting the level of interference from the power of the first signals and determining the power scaling factor based on the power resulting from the subtraction.
5. The communication terminal according to claim 4 , wherein the interference control unit is configured to determine the power scaling factor based on a normalization of the power resulting from the subtraction.
6. The communication terminal according to claim 5 , wherein the interference control unit is configured to normalize the power resulting from the subtraction by an estimate of the power of the plurality of first signals.
7. The communication terminal according to claim 1 , wherein the first set of communication resources are a set of resource elements scheduled for the communication for reception of signals scaled with the power scaling factor.
8. The communication terminal according to claim 1 , wherein the second set of communication resources are a set of resource elements scheduled for the communication for reception of signals scaled with a further power scaling factor different from the power scaling factor.
9. The communication terminal according to claim 1 , wherein the second set of communication resources are a set of resource elements scheduled for the communication for reception of unscaled signals.
10. The communication terminal according to claim 1 , wherein the first set of communication resources are a set of resource elements scheduled for the communication terminal for data reception.
11. The communication terminal according to claim 1 , wherein the second set of communication resources are a set of resource elements scheduled for the communication terminal for pilot signal reception.
12. The communication terminal according to claim 1 , wherein the communication terminal is served by a serving radio cell and the one or more interferers include other radio cells neighboring the serving radio cell.
13. The communication terminal according to claim 1 , wherein the communication terminal comprises a selector configured to select the first set of communication resources and the second set of communication resources based on scheduling information about at least one of the one or more interferers.
14. The communication terminal according to claim 13 , wherein the scheduling information specifies whether the at least one of the one or more interferers has scheduled data transmission using the first set of communication resources.
15. The communication terminal according to claim 13 , wherein the first set of communication resources and the second set of communication resources are communication resources of a resource block and the selector is configured to select the resource block based on the scheduling information.
16. The communication terminal according to claim 1 , being a user equipment according to a mobile communication standard.
17. The communication terminal according to claim 1 , wherein the signal components of the plurality of first signals are signals sent to the communication terminal by an eNodeB according to a mobile communication standard.
18. A method for determining a power scaling factor, comprising:
receiving a plurality of first signals on a first set of communication resources;
receiving a plurality of second signals on a second set of communication resources;
determining a level of interference of one or more interferers included in the plurality of second signals; and
determining a power scaling factor of a plurality of signal components of the plurality of first signals based on the level of interference by the one or more interferers.
19. The method according to claim 18 , further comprising canceling the interference of the one or more interferers included in the first signals using the level of interference.
20. The method according to claim 18 , further comprising canceling influence of interference of the one or more interferers on reception power of the first set of communication resources using the level of interference on the second set of communication resources.
21. The method according to claim 18 , wherein the level of interference on the second set of communication resources is a power level of interference and determining the power scaling factor comprises subtracting the level of interference from the power of the first signals and determining the power scaling factor based on the power resulting from the subtraction.
22. The method according to claim 18 , further comprising determining the power scaling factor based on a normalization of the power resulting from the subtraction.
23. The method according to claim 22 , further comprising normalizing the power resulting from the subtraction by an estimate of the power of the first signals.