Diversity control in wireless communications devices and methods
First Claim
Patent Images
1. A method in a wireless communications station having a diversity receive branch, the method comprising:
- determining a channel quality indicator with the diversity receive branch enabled;
using the channel quality indicator determined with the diversity receive branch enabled in a comparison with a first threshold;
controlling operation of the diversity receive branch based upon the comparison with the first threshold.
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Accused Products
Abstract
A wireless communications device (100) includes a primary radio frequency branch (134) and a diversity branch (136), which is enabled and disabled to balance performance and power consumption. Diversity mode operation of the device is controlled, for example, based on one or more of an estimated channel quality indicator, data reception, data rate, state or mode of the station, estimated signal to noise ratio of a pilot signal, battery power level, distance from a serving cell, among other factors.
309 Citations
32 Claims
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1. A method in a wireless communications station having a diversity receive branch, the method comprising:
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determining a channel quality indicator with the diversity receive branch enabled;
using the channel quality indicator determined with the diversity receive branch enabled in a comparison with a first threshold;
controlling operation of the diversity receive branch based upon the comparison with the first threshold. - View Dependent Claims (2, 4, 5, 6)
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3. The method of claim 3,
operating the diversity receive branch when the channel quality indicator exceeds the first threshold, not operating the diversity receive branch when the channel quality indicator does not exceed a second threshold, which may be the same as the first threshold.
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7. A method in a wireless mobile communications station having diversity receive mode capability, the method comprising:
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receiving packet information at the wireless mobile communications station;
operating the wireless mobile communications station in diversity reception mode when receiving packet information, not operating the wireless mobile communications station in diversity reception mode no additional packet information is received within a specified time interval after receiving the packet information. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A method in a wireless mobile communications station having diversity receive mode capability, the method comprising:
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transitioning the wireless mobile communications station between an intermediate state and active and dormant states;
controlling the diversity receive mode capability when transitioning to and from the intermediate state. - View Dependent Claims (16, 17, 18, 19)
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20. A method in a wireless mobile communications station having diversity receive mode capability, the method comprising:
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performing a soft handoff during a soft handoff period;
operating the wireless mobile communications station in diversity receive mode during the soft handoff period. - View Dependent Claims (21, 22, 23)
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24. A method in a wireless mobile communications station having diversity receive mode capability, the method comprising:
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receiving a signal;
estimating a signal to noise ratio of the received signal without first demodulating the received signal;
enabling diversity reception in the wireless mobile communications station when the estimated signal to noise ratio is less than a specified threshold. - View Dependent Claims (25, 26)
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27. A method in a wireless mobile communications station having diversity receive mode capability, the method comprising:
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determining an anticipated downlink data rate for the wireless mobile communications station;
enabling diversity reception in the wireless mobile communications station if the anticipated data rate exceeds a specified threshold. - View Dependent Claims (28, 29)
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30. A method in a wireless mobile communications station having diversity receive mode capability, the method comprising:
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determining an estimated distance of the wireless mobile communications station from a serving cell;
controlling diversity reception in the wireless mobile communications station based upon the distance of the wireless mobile communications station from the serving cell.
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31. A method in a wireless mobile communications station having diversity receive mode capability, the method comprising:
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determining an estimated level of a battery of the wireless mobile communications station;
controlling diversity reception in the wireless mobile communications station based upon the estimated level of the battery of the wireless mobile communications station.
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32. A method in a wireless mobile communications station having diversity receive mode capability, the method comprising:
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determining a ratio of despread signal power to despread power of cell interferers at the wireless mobile communications station;
controlling diversity reception in the wireless mobile communications station based upon the ratio of despread signal power to despread power of cell interferers at the wireless mobile communications station.
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Specification