Receiving wireless signals with multiple diversity settings
View Patent ↗Methods and systems of receiving wireless signals are disclosed. One method includes a receiver characterizing signal quality parameters of receive signals for a plurality of receive diversity settings. The receiver selects a first receive diversity setting for synchronizing the receiver with the receive signal based on the characterized signal quality parameters. The receiver selects a second receive diversity setting for receiving data with the receive signal based on the characterized signal quality parameters.
1. A method of receiving wireless signals, comprising:
a receiver characterizing signal quality parameters of receive signals for a plurality of receive diversity settings;
the receiver selecting a first receive diversity setting for synchronizing the receiver with the receive signal based on the characterized signal quality parameters;
the receiver selecting a second receive diversity setting for receiving data with the receive signal based on the characterized signal quality parameters.
2. The method of claim 1 , wherein the signal quality parameters comprises at least one of a receive signal SNR, receive signal SINR, predicted PER, receive signal CIR, and interfering signal channel impulse response.
3. The method of claim 1 , wherein the signal quality parameters comprises at least one of a receive signal dispersion, and an interfering signal dispersion.
4. The method of claim 2 , wherein at least one of SNR and SIR of the receive signals is greater for the second receive diversity setting than for the first receive diversity setting.
5. The method of claim 3 , wherein receive signal dispersion of the receive signals is less for the first receive diversity setting than for the second receive diversity setting.
6. The method of claim 1 , further comprising the receiver characterizing the signal quality parameters of the received signals for a plurality of receiver diversity settings during preamble portions of the received signals.
7. The method of claim 1 , wherein the receive signals comprise packets, and the receiver characterizes signal quality parameters of receive signals of one receive diversity setting per packet.
8. The method of claim 1 , wherein the receive signals comprise packets, and the receiver characterizes signal quality parameters of receive signals of multiple receive diversity settings per packet.
9. The method of claim 1 , wherein the receiver characterizes signal quality parameters of receive signals of at least receive diversity setting during one packet of the received signals, and selects the first diversity setting during subsequent packets of the receive signals.
10. The method of claim 1 , wherein the receiver characterizes signal quality parameters of receive signals of at least receive diversity setting during one packet of the received signals, and selects the second diversity setting during the one packet of the receive signals.
11. The method of claim 1 , wherein receiver characterizing signal quality parameters of receive signals for a plurality of receive diversity settings comprises the receiver adjusting a relative phase between receive signals of different receive antennas for at least a portion of the receive diversity settings.
12. The method of claim 1 , wherein the first receive diversity setting comprises a one of the plurality of receive diversity settings that has a lowest signal dispersion, and wherein the second receive diversity setting comprises a one of the plurality of receive diversity settings that has at least one of the greatest SNR or SINR, or lowest predicted PER.
13. The method of claim 1 , wherein the first receive diversity setting comprises a one of the plurality of receive diversity settings that has a maximum signal dispersion of at least one known interfering signal.
14. The method of claim 1 , further comprising the receiver averaging the signal quality parameters over a plurality of received packets.
15. The method of claim 1 , wherein the receive signals comprising frequency hopping signals that hop between N frequency hopping bands, and wherein synchronization to the receive signals comprises:
characterizing receive signal quality for a plurality of receive diversity settings for each of the N frequency hopping bands;
initiating synchronization of the received signals during a one of the frequency hopping bands based on the characterized receive signal quality of each of the N frequency hopping bands for each of the plurality of receive diversity settings.
16. The method of claim 1 , further comprising the receiver selecting the first receive diversity setting for synchronizing the receiver with the receive signal based on determining a percentage of receive signal packets that are not properly synchronized.
17. The method of claim 16 , wherein determining receive signal packets that are not properly synchronized comprises detecting packet header decoding errors.
18. The method of claim 16 , wherein determining receive signal packets that are not properly synchronized comprises determining that scheduled packets are not received.
19. The method of claim 16 , wherein determining receive signal packets that are not properly synchronized comprises determining that the receiver is synchronizing to packets of an interfering signal.
20. A method of communicating wireless signals, comprising:
characterizing signal quality parameters of wireless signals for a plurality of communication diversity settings;
selecting a first communication diversity setting for synchronizing a receiver with the wireless signals based on the characterized signal quality parameters;
selecting a second communication diversity setting for the receiver receiving data with the wireless signals based on the characterized signal quality parameters.
21. The method of claim 20 , further comprising:
at least one of a transmitter and the receiver characterizing the signal quality parameters;
at least one of the transmitter and the receiver selecting the first communication diversity setting;
at least one of the transmitter and the receiver selecting the second communication diversity setting.
22. The method of claim 21 , wherein the at least one of the first communication diversity setting and the second communication diversity setting is jointly selected by the transmitter and the receiver.
23. The method of claim 20 , wherein a transmitter characterizes the signal quality parameters by receiving wireless signals from the receiver and assuming transmission channel reciprocity.
24. The method of claim 20 , wherein at least one of the first receive diversity setting and the second receive diversity setting is selected by the transmitter.
25. A method of receiving wireless signals, comprising:
a receiver characterizing receive signal interference, receive signal noise and receive signal dispersion for a plurality of receive diversity settings;
the receiver selecting a first receive diversity setting for synchronizing with the receive signal;
the receiver selecting a second receive diversity setting for receiving data with the receive signal.