Dynamic frequency selection and radar detection with a wireless LAN
First Claim
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1. An apparatus, comprising:
- a communication receiver, said communication receiver includes a down-converter and a receiver signal strength indicator unit; and
a radar receiver, said radar receiver includes a peak detector and a comparator, the comparator to compare a radar signal passed from said receiver front end through said peak detector to said comparator with a reference signal to detect a radar signal having a predetermined power level, and said receiver signal strength indicator unit indicates a quality of a channel of said communication receiver, said communication receiver to select a higher quality channel when the radar signal having a predetermined power level is detected.
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Abstract
A receiver in a wireless communication system detects a possibly interfering radar signal, and uses dynamic frequency selection to switch to a non-interfering channel. The power level and the channel of the radar signal may be detected. When a radar signal that exceeds a predetermined power level is detected, the receiver may be tuned until the channel of the radar signal matches the communication receiver channel. The communication receiver may then be tuned to a higher quality channel to mitigate or avoid interference between communication signals and the radar signal.
64 Citations
29 Claims
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1. An apparatus, comprising:
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a communication receiver, said communication receiver includes a down-converter and a receiver signal strength indicator unit; and
a radar receiver, said radar receiver includes a peak detector and a comparator, the comparator to compare a radar signal passed from said receiver front end through said peak detector to said comparator with a reference signal to detect a radar signal having a predetermined power level, and said receiver signal strength indicator unit indicates a quality of a channel of said communication receiver, said communication receiver to select a higher quality channel when the radar signal having a predetermined power level is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus, comprising:
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a wireless local area network device, said wireless local area network device to operate at a frequency of about 2 GHz to about 5 GHz; and
a dynamic frequency selection receiver disposed in said wireless local area device, said dynamic frequency selection receiver comprising;
a receiver input stage;
a communication receiver, said communication receiver includes a down-converter and an receiver signal strength indicator unit; and
a radar receiver coupled to said receiver input stage, said radar receiver includes a peak detector and a comparator, the comparator to compare a radar signal passed from a receiver input stage through said peak detector to said comparator with a reference signal to detect a radar signal having a predetermined power level, said radar receiver further including a video detector, a pulse shaper, and said receiver signal strength indicator unit indicates a quality of a channel of said communication receiver, said communication receiver to select a higher quality channel when the radar signal having a predetermined power level is detected. - View Dependent Claims (15, 16, 17, 18)
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19. A method, comprising:
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detecting the presence of a radar signal by comparing a level of the radar signal to a reference level to determine when the radar signal has a power level greater than a predetermined power level;
determining the channel on the radar signal by sweeping the channel of a communication receiver until the channel of the communication receiver matches the channel of the radar signal; and
switching the channel of the communication receiver to another channel. - View Dependent Claims (20, 21, 22, 23, 24)
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25. An apparatus, comprising:
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a wireless local area network receiver to receive a communications signal;
a radar receiver to detect a radar signal; and
a channel selector to switch said wireless local area network receiver to a higher quality channel when said radar receiver detects a radar signal. - View Dependent Claims (26, 27, 28, 29)
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Specification