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Passive intermodulation source positioning method and device

A technology of passive intermodulation and positioning method, which is used in wireless communication, radio transmission system, electrical components, etc.

Active Publication Date: 2022-02-22
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, external devices may also become new PIM sources

Method used

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  • Passive intermodulation source positioning method and device
  • Passive intermodulation source positioning method and device
  • Passive intermodulation source positioning method and device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0083] Example 1: Downlink positioning method

[0084]In each scanning process for the first scanning point, in S310, the network device may perform precoding processing on at least one downlink signal among the multiple downlink signals according to at least one precoding matrix at the first scanning point, and then pass the The transmitting antenna sends a plurality of downlink signals for the first scanning point, and receives the uplink PIM signal for the first scanning point through the receiving antenna. After traversing the multiple scanning points, the network device may analyze and determine in S320 according to the uplink PIM signal corresponding to each of the multiple scanning points, and determine the PIM source in the multiple scanning points. What needs to be explained here is that in the embodiment of the present application, the precoding matrix of each scanning point corresponds to the downlink carrier frequency. Types can be pre-configured. In addition, wh...

example 2

[0085] Example 2: Uplink Positioning Method

[0086] In S310, the network device sends a plurality of downlink signals through the transmitting antenna (it can be a plurality of downlink baseband signals of different frequencies sent through the transmitting antenna when the network device is in normal operation), and receives the uplink signals generated by the excitation of multiple downlink signals through the receiving antenna. PIM signal. In each scanning process for the first scanning point, the network device performs weighted sum processing on the uplink PIM signals received by multiple receiving antennas according to a weight matrix of the first scanning point to obtain the first signal, and determine the power of the first signal. After traversing the multiple scanning points, the network device may analyze and determine in S320 according to the power of the first signal corresponding to each of the multiple scanning points, and determine the PIM source in the multi...

example 3

[0087] Example 3: Downlink + Uplink positioning method

[0088] In the secondary scanning process for the first scanning point, in S310, the network device may perform precoding processing on at least one downlink signal among the multiple downlink signals according to at least one precoding matrix at the first scanning point, and then pass the The transmitting antenna sends multiple downlink signals for the first scanning point, and receives the uplink PIM signal for the first scanning point through the receiving antenna. The network device performs weighted sum processing on the uplink PIM signals received by multiple receiving antennas according to a weight matrix of the first scanning point to obtain the first signal and determine the power of the first signal. After traversing the multiple scanning points, the network device may analyze and determine in S320 according to the power of the first signal corresponding to each of the multiple scanning points, and determine the...

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Abstract

The invention discloses a passive intermodulation source positioning method and device, which relate to the technical field of wireless communication. The method comprises the following steps that the network equipment sequentially executes a scanning process for each scanning point in a plurality of scanning points through the following steps of sending a plurality of downlink signals with different frequencies for a first scanning point through a transmitting antenna, and receiving an uplink PIM signal for the first scanning point through a receiving antenna, wherein the first scanning point is any one scanning point in the plurality of scanning points, and the uplink PIM signal is generated by excitation of any at least two downlink signals in a plurality of downlink signals; and the network equipment determines a PIM source in the plurality of scanning points according to the uplink PIM signals corresponding to the plurality of scanning points respectively. Therefore, the positioning of the PIM source can be realized through the network equipment without depending on external equipment.

Description

technical field [0001] The present application relates to the technical field of wireless communication, in particular to a method and device for locating passive intermodulation sources. 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 (Passive Inter-Modulation, 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. Downlink transmission signals of two or more frequencies hit an intermodulation source in the external environment, which will generate a PIM signal of a new frequency and reflect back to the receiving end of the system. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00H04B7/0456
CPCH04W64/00H04B7/0456G01S13/765G01S7/0236H04B17/318H04B1/1027H04B17/17H04B1/10G01S13/75H04W24/08
Inventor 杨智霍强王敬伦陈曦邹志强
Owner HUAWEI TECH CO LTD
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