Passive intermodulation fault point detection method and device

Abstract

The invention discloses a passive intermodulation fault point detection method and device, and relates to the technical field of wireless communication. The method comprises the following steps: network equipment sends a plurality of downlink signals with different frequencies through an antenna feeder system and receives a first signal, wherein the first signal is an uplink PIM signal generated by excitation of any at least two downlink signals in the plurality of downlink signals; the network equipment determines second signals corresponding to a plurality of detection points respectively, and the second signal corresponding to any detection point is an estimated signal of the PIM signal of any detection point; and the network equipment determines a PIM fault point in the plurality of detection points according to the first signal and the second signals respectively corresponding to the plurality of detection points. Therefore, the network device can detect the PIM fault point in the antenna feed system without depending on a tester or an external device.

Description

technical field [0001] The present application relates to the technical field of wireless communication, in particular to a method and device for detecting passive intermodulation fault points. Background technique [0002] With the development of wireless communication systems, the bandwidth and the number of antennas are increasing day by day, and passive intermodulation (PIM) interference has become an important factor limiting system capacity. [0003] Passive intermodulation in wireless communication systems refers to the intermodulation effect caused by the non-linearity of the devices themselves when passive devices such as connectors, feeders, antennas, and filters work under high-power signal conditions at multiple frequencies. When downlink signals of two or more frequencies hit the intermodulation fault point, a PIM signal of a new frequency will be generated and reflected back to the receiving end of the system. If the frequency of the PIM signal falls within th...

AI Technical Summary

Problems solved by technology

However, due to the limitations of the working mechanism of testers or external devices, the scope of application is limited and the labor cost is high

For example, using manual on-site operations to detect PIM fault points through segmented troubleshooting requires testers to check PIM fault points one by one, which is time-consuming, inefficient, and costly, and it is impossible to detect multiple PIM fault points at the same time

For another example, the scheme of using external equipment to detect PIM fault points through single-frequency point scanning method is generally only suitable for a relatively narrow frequency point range, has poor versatility, and has low detection accuracy for PIM fault points.

When the scanning time is long, the strength of the PIM signal will change with the temperature in the actual environment, etc., resulting in a large positioning error

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