Uplink spectrum analysis technique for passive intermodulation (PIM) detection
First Claim
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1. A method for identifying passive intermodulation, PIM, at a base station in a wireless communication system, the method comprising:
- measuring the noise floor in a radio frequency, RF, channel of an uplink carrier, the uplink carrier being a carrier received from a wireless device by the base station during normal operation, measuring the noise floor including measuring the noise floor at an uplink carrier edge region, the edge region including at least one of a part of the RF channel of the uplink carrier where no signal energy is transmitted and a part of an adjacent RF channel of another uplink carrier where no signal energy is transmitted;
comparing the measured noise floor to a predetermined noise floor; and
determining whether PIM is present based on a result of the comparison.
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Abstract
A method and system for identifying passive intermodulation, PIM, at a base station in a wireless communication system are disclosed. In some embodiments, a method includes measuring the noise floor in a radio frequency, RF, channel of an uplink carrier, the uplink carrier comprising a carrier transmitted from a wireless device to the base station. The method includes comparing the measured noise floor to a predetermined noise floor. The method also includes determining whether PIM is present based on a result of the comparison.
38 Citations
22 Claims
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1. A method for identifying passive intermodulation, PIM, at a base station in a wireless communication system, the method comprising:
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measuring the noise floor in a radio frequency, RF, channel of an uplink carrier, the uplink carrier being a carrier received from a wireless device by the base station during normal operation, measuring the noise floor including measuring the noise floor at an uplink carrier edge region, the edge region including at least one of a part of the RF channel of the uplink carrier where no signal energy is transmitted and a part of an adjacent RF channel of another uplink carrier where no signal energy is transmitted; comparing the measured noise floor to a predetermined noise floor; and determining whether PIM is present based on a result of the comparison. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A base station configured to detect passive intermodulation, PIM, the base station comprising:
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processing circuitry, the processing circuitry including a processor, and a memory, the memory containing instructions that, when executed by the processor, configure the processor to; measure a noise floor of a radio frequency, RF, channel of an uplink carrier, the uplink carrier being a carrier received from a wireless device by the base station during normal operation, the measuring including measuring the noise floor at an uplink carrier edge region, the edge region including at least one of a part of the RF channel of the uplink carrier where no signal energy is transmitted and a part of an adjacent RF channel of another uplink carrier where no signal energy is transmitted; compare the measured noise floor to a predetermined noise floor; and determine whether PIM is present based on a result of the comparison. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A base station configured to detect passive intermodulation, PIM, the base station comprising:
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a power detection module configured to measure a noise floor of a radio frequency, RF, channel of an uplink carrier, the uplink carrier being a carrier received from a wireless device by the base station during normal operation, the measuring including measuring the noise floor at an uplink carrier edge region, the edge region including at least one of a part of the RF channel of the uplink carrier where no signal energy is transmitted and a part of an adjacent RF channel of another uplink carrier where no signal energy is transmitted; a comparison module configured to compare the measured noise floor to a predetermined noise floor; and a passive intermodulation, PIM, determination module, configured to determine whether PIM is present based on a result of the comparison. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A network node configured to detect passive intermodulation, PIM, the network node comprising:
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a receiver configured to receive a measurement of a noise floor of a radio frequency, RF, band of an uplink carrier, the uplink carrier comprising a carrier transmitted from a wireless device to a base station, the measurement including a measurement of the noise floor at an uplink carrier edge region, the edge region including at least one of a part of the RF channel of the uplink carrier where no signal energy is transmitted and a part of an adjacent RF channel of another uplink carrier where no signal energy is transmitted; and processing circuitry, the processing circuitry including a processor and a memory, the memory containing instructions that, when executed by the processor, configure the processor to; compare the measured noise floor to a predetermined noise floor; and determine whether PIM is present based on a result of the comparison. - View Dependent Claims (20, 21, 22)
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Specification