Dynamic noise floors in a wireless device
First Claim
1. A method comprising:
- receiving a wireless signal;
determining if the wireless signal corresponds to a wireless networking packet to be demodulated when a measured power associated with the wireless signal is greater than a threshold; and
adjusting the threshold so that the power associated with the wireless signal is less than the threshold if the wireless signal does not correspond to a wireless networking packet to be demodulated.
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Accused Products
Abstract
A wireless device configured to support a wireless networking protocol may utilize signal processing techniques that can mitigate the effects of jammer signals. For example, when a measured power associated with a digital sample of a received wireless signal is greater than a threshold, the wireless device may determine if the wireless signal corresponds to a wireless networking packet to be demodulated. If the wireless signal does not correspond to a wireless networking packet to be demodulated, the wireless device may adjust the threshold so that the power associated with the digital sample is less than the threshold. In other words, if the signal is a jammer signal, the wireless device may adjust its noise floor upward so that continuous reception of the same jammer signal does not trigger demodulation a second time.
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Citations
36 Claims
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1. A method comprising:
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receiving a wireless signal;
determining if the wireless signal corresponds to a wireless networking packet to be demodulated when a measured power associated with the wireless signal is greater than a threshold; and
adjusting the threshold so that the power associated with the wireless signal is less than the threshold if the wireless signal does not correspond to a wireless networking packet to be demodulated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method comprising:
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receiving a wireless signal;
processing the wireless signal in one of a plurality of gain states;
measuring an average power level associated with a number of digital samples of the wireless signal;
defining upper and lower thresholds relative to the average power level;
determining if the wireless signal is a wireless networking packet to be demodulated when a power level associated with one sample exceeds the upper threshold; and
adjusting the upper threshold so that the power associated with the one sample is less than the upper threshold if the wireless signal does not correspond to a wireless networking packet to be demodulated.
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- 14. The method of claim 14, further comprising resetting the upper and lower thresholds when the power level associated with one sample is less than the lower threshold.
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16. A wireless device comprising:
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a receiver that receives a wireless signal; and
a control unit that determines if the wireless signal corresponds to a wireless networking packet to be demodulated when a measured power associated with the wireless signal is greater than a threshold, and adjusts the threshold so that the power associated with the wireless signal is less than the threshold if the wireless signal does not correspond to a wireless networking packet to be demodulated. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A wireless device comprising:
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a receiver to receive a wireless signal and process the wireless signal in one of a plurality of gain states;
an analog-to-digital converter to convert the wireless signal to digital samples; and
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a modem to measure an average power level associated with a number of digital samples of the wireless signal, define upper and lower thresholds relative to the average power level, determine if the wireless signal is a wireless networking packet to be demodulated when a power level associated with one sample exceeds the upper threshold, and adjust the upper threshold so that the power associated with the one sample is less than the upper threshold if the wireless signal does not correspond to a wireless networking packet to be demodulated. - View Dependent Claims (27, 28)
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29. A modem comprising:
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a power detector to measure an average power level associated with a number of digital samples of the wireless signal and defines upper and lower thresholds relative to the average power level, and a demodulation unit to determine whether the wireless signal is a wireless networking packet to be demodulated when a power level associated with one sample exceeds the upper threshold, and to demodulate the wireless signal if the wireless signal is a wireless networking packet to be demodulated. - View Dependent Claims (30, 31, 32)
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33. A computer readable medium comprising program code that when executed in a wireless device cause the wireless device to:
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determine if a received wireless signal corresponds to a wireless networking packet to be demodulated when a measured power associated with the wireless signal is greater than a threshold; and
adjust the threshold so that the power associated with the wireless signal is less than the threshold if the wireless signal does not correspond to a wireless networking packet to be demodulated. - View Dependent Claims (34)
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35. An apparatus comprising:
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means for determining if a received wireless signal corresponds to a wireless networking packet to be demodulated when a measured power associated with the wireless signal is greater than a threshold; and
means for adjusting the threshold so that the power associated with the wireless signal is less than the threshold if the wireless signal does not correspond to a wireless networking packet to be demodulated. - View Dependent Claims (36)
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Specification