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A method and device for detecting interference signals

A technology for interfering signals and symbols, used in the field of communications

Active Publication Date: 2017-07-21
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method for detecting signal interference, aiming to solve the problem of how to simply detect passive intermodulation interference

Method used

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  • A method and device for detecting interference signals
  • A method and device for detecting interference signals
  • A method and device for detecting interference signals

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Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0048] refer to figure 1 , figure 1 It is a flowchart of a method for detecting an interference signal provided by an embodiment of the present invention. Such as figure 1 As shown, the method includes the following steps:

[0049] Step 101, select a data frame, and select a time-domain symbol for measuring an interference signal on the data frame, and the time-domain symbol is a downlink interference symbol and an uplink idle symbol;

[0050] Optionally, the s...

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Abstract

The invention discloses a method for detecting an interference signal. According to the method, signal power spectrum characterisitics of symbols having different time domains in uplink and downlink sub frames of an LTE FDD system are used, detection of a passive intermodulation interference is performed on a baseband digital signal directly in a wireless receiving machine of an LTE, real-time detection can be perfoemd when wireless transmission of user data in a base station is performed, and off-line detection can also be performed when no user data transmission is performed in the base station. According to the method, processing, for an intermediate frequency signal, of a detection circuit does not need to be increased in the receiving machine, and an intermodulation signal also does not need to be generated in the receiving machine, so the object of simple measurement of the passive intermodulation interference is achieved.

Description

technical field [0001] Embodiments of the present invention relate to the communication field, and in particular, to a method and device for detecting interference signals. Background technique [0002] The reason for passive intermodulation is that there is nonlinearity in the radio frequency channel, and the index to measure the nonlinearity of the system is the degree of intermodulation suppression. For a linear system, 2 signals are input and 2 signals are output, and no new frequency components will appear. However, if the system is nonlinear, new frequency components will be generated in the system after inputting 2 signals, and the resulting new The frequency component of the frequency component is an intermodulation product. The phenomenon generated by this new frequency component is called intermodulation. If the intermodulation product falls into the receiving bandwidth of the receiver and causes the uplink interference to rise, it is called intermodulation interfe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/345
Inventor 周卫荣张健
Owner HUAWEI TECH CO LTD