Receiver nonlinearity estimation and cancellation
Systems and methods are provided for receiver nonlinearity estimation and cancellation. Narrowband (NB) estimation may be performed in a receiver during handling of received radio frequency (RF) signals. The narrowband (NB) may include generating estimation channelization information relating to received RF signals; generating reference nonlinearity information relating to one or more other signals, which may cause or contribute to nonlinearity that affects the processing of the received RF signals; and generating, based on the estimation channelization information relating to the received RF signals and the reference nonlinearity information relating to the other signals, control data for configuring nonlinearity cancellation functions. The received RF signals may be channelized, and the estimation channelization information may be generated based on the channelization of the received RF signals. The other signals may be channelized, and the reference nonlinearity information may be generated based on the channelization of the other signals.
1. A method for performing narrowband (NB) estimation, the method comprising:
generating estimation channelization information relating to received RF signals;
generating reference nonlinearity information relating to one or more other signals, wherein the one or more other signals cause or contribute to nonlinearity that affects processing of the received RF signals; and
generating, based on the estimation channelization information relating to the received RF signals and the reference nonlinearity information relating to the one or more other signals, control data for configuring nonlinearity cancellation functions.
2. The method of claim 1 , comprising:
channelizing the received RF signals; and
generating the estimation channelization information based on the channelization of the received RF signals.
3. The method of claim 2 , comprising:
extracting during the channelization of the received RF signals, one or more narrowband (NB) channels; and
generating the estimation channelization information based on the extracted one or more narrowband (NB) channels.
4. The method of claim 1 , comprising:
channelizing the one or more other signals; and
generating the reference nonlinearity information based on the channelization of the one or more other signals.
5. The method of claim 4 , comprising:
obtaining a plurality of channels based on the channelization of the one or more other signals; and
generating the reference nonlinearity information based on processing of the plurality of channels.
6. The method of claim 5 , comprising selecting a subset of channels, and processing only each of the subset of channels.
7. The method of claim 6 , comprising applying a conjugate function based adjustment to one or more of the subset of channels.
8. The method of claim 6 , comprising applying a DC notch based adjustment to at least one or the subset of channels, the DC notch based adjustment comprising removing DC components.
9. The method of claim 6 , comprising applying one or more delays to synchronize processing of each of the subset of channels.
10. The method of claim 1 , comprising applying a delay to synchronize the generating of the estimation channelization information relating to the received RF signals and the generating of the reference nonlinearity information relating to the one or more other signals.
11. A system comprising:
one or more circuits for performing narrowband (NB) estimation, the one or more circuits being configured to:
generate estimation channelization information relating to received RF signals;
generate reference nonlinearity information relating to one or more other signals, wherein the one or more other signals cause or contribute to nonlinearity that affects processing of the received RF signals; and
generate, based on the estimation channelization information relating to the received RF signals and the reference nonlinearity information relating to the one or more other signals, control data for configuring nonlinearity cancellation functions.
12. The system of claim 11 , wherein the one or more circuits are configured to:
channelize the received RF signals; and
generate the estimation channelization information based on the channelization of the received RF signals.
13. The system of claim 12 , wherein the one or more circuits are configured to:
extract during the channelization of the received RF signals, one or more narrowband (NB) channels; and
generate the estimation channelization information based on the extracted one or more narrowband (NB) channels.
14. The system of claim 11 , wherein the one or more circuits are configured to:
channelize the one or more other signals; and
generate the reference nonlinearity information based on the channelization of the one or more other signals.
15. The system of claim 14 , wherein the one or more circuits are configured to:
obtain a plurality of channels based on the channelization of the one or more other signals; and
generate the reference nonlinearity information based on processing of the plurality of channels.
16. The system of claim 15 , wherein the one or more circuits are configured to select a subset of channels, and processing only each of the subset of channels.
17. The system of claim 16 , wherein the one or more circuits are configured to apply a conjugate function based adjustment to one or more of the subset of channels.
18. The system of claim 16 , wherein the one or more circuits are configured to apply a DC notch based adjustment to at least one or the subset of channels, the DC notch based adjustment comprising removing DC components.
19. The system of claim 16 , wherein the one or more circuits are configured to apply one or more delays to synchronize processing of each of the subset of channels.
20. The system of claim 11 , wherein the one or more circuits are configured to apply a delay to synchronize the generating of the estimation channelization information relating to the received RF signals and the generating of the reference nonlinearity information relating to the one or more other signals.