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Amplitude modulation broadcast interference evaluation method and equipment

A technology for AM broadcasting and jamming signals, which is applied in the field of communication and can solve the problems of low evaluation accuracy, error-prone and low evaluation accuracy.

Pending Publication Date: 2020-07-07
BEIJING CHANGFENG BROADCASTING COMM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing interference effect evaluation methods are qualitative evaluation, and the evaluation accuracy is not high
There is also a method of interference assessment by separately processing and analyzing the received signal before interference and the signal received after interference, but at present, this method is prone to errors and the evaluation accuracy is not high

Method used

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  • Amplitude modulation broadcast interference evaluation method and equipment
  • Amplitude modulation broadcast interference evaluation method and equipment
  • Amplitude modulation broadcast interference evaluation method and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] figure 1 This is a schematic flow chart of a method for evaluating AM broadcast interference provided by the first embodiment of the present invention. This embodiment may be suitable for evaluating the interference effect of AM broadcast interference. Such as figure 1 As shown, an AM broadcast interference evaluation method provided by Embodiment 1 of the present invention includes:

[0058] S110. Perform digital sampling on the original AM broadcast signal to obtain a first digital modulation signal.

[0059] Specifically, an AM broadcast signal is a wave signal whose carrier frequency does not change, and the carrier amplitude changes with the changing law of the modulated signal. The modulated signal is a low-frequency signal transformed from original information (for example, voice information). The carrier is also called To be modulated signal, therefore, AM broadcast signal includes modulated signal and carrier signal, and modulated signal is the signal needed to tran...

Embodiment 2

[0073] figure 2 This is a schematic flow chart of a method for evaluating interference in AM broadcasting according to the second embodiment of the present invention. This embodiment is a further refinement of the above-mentioned embodiment. Such as figure 2 As shown, an AM broadcast interference evaluation method provided by Embodiment 2 of the present invention includes:

[0074] S201. Receive an original AM broadcast signal.

[0075] S202: Perform first detection processing on the original AM broadcast signal to obtain a first analog modulated signal.

[0076] Specifically, the original AM broadcast signal refers to a normal, uninterrupted AM broadcast signal, which can be received through an antenna. The original AM broadcast signal is a wave signal whose carrier frequency remains constant but the amplitude changes with time. The carrier wave refers to the waveform modulated to transmit the signal. The original AM broadcast signal is a continuous physical quantity in time or ...

Embodiment 3

[0146] image 3 This is a schematic structural diagram of an AM broadcasting interference evaluation device provided in Embodiment 3 of the present invention. This embodiment may be suitable for evaluating the interference effect of AM broadcasting interference. The AM broadcast interference assessment device provided in this embodiment can implement the AM broadcast interference assessment method provided in any embodiment of the present invention, and has the corresponding functional structure and beneficial effects of the implementation method. For the content not described in detail in this embodiment, please refer to the present invention. Description of method embodiments.

[0147] Such as image 3 As shown, the AM broadcast interference evaluation device provided in the third embodiment of the present invention includes: a first sampling module 31, a second sampling module 32, a spectral component determination module 33, a scaling module 34, an interference parameter deter...

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Abstract

An embodiment of the invention discloses an amplitude modulation broadcast interference evaluation method and amplitude modulation broadcast interference evaluation equipment. The amplitude modulationbroadcast interference evaluation method comprises the following steps of: carrying out digital sampling on an original amplitude modulation broadcast signal to obtain a first digital modulation signal; carrying out digital sampling on a target amplitude modulation broadcast signal to obtain a second digital modulation signal, wherein the target amplitude modulation broadcast signal is an amplitude modulation broadcast signal obtained by using an interference signal to interfere the original amplitude modulation broadcast signal; determining a first spectral component of the first digital modulation signal and a second spectral component of the second digital modulation signal; scaling a difference value between the first spectrum component and the second spectrum component according to apreset rule to obtain a scaled component; determining an interference evaluation parameter according to the scaling component and the maximum value of the first original spectrum component; and evaluating the interference effect of the interference signal according to the interference evaluation parameter. According to the amplitude modulation broadcast interference evaluation method and the amplitude modulation broadcast interference evaluation equipment, the interference effect of the interference signal is quantitatively expressed through using the interference evaluation parameters, and the accuracy degree of interference effect evaluation is improved.

Description

Technical field [0001] The embodiments of the present invention relate to the field of communication technologies, and in particular, to a method and equipment for evaluating interference in AM broadcasting. Background technique [0002] AM broadcasting is a radio broadcasting method that uses amplitude modulation technology. Amplitude modulation is a modulation method in which the frequency of the carrier remains unchanged and its amplitude changes according to the changing law of the transmitted signal. It can be used for long-wave, medium-wave and short-wave broadcasting. AM broadcasting occupies a narrow bandwidth and can achieve large-scale coverage, so it is widely used. [0003] However, in some special cases, it is necessary to suppress the interference of the AM broadcast of a certain channel to prevent the content of the AM broadcast of the channel from being heard. Interference suppression is to use interference signals to interfere with normal AM broadcasting. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04H60/29H04B17/345
CPCH04B17/345H04H60/29
Inventor 张明杨颖王志宇刘巍关志鹏张诚
Owner BEIJING CHANGFENG BROADCASTING COMM EQUIP