CN211531106U - Amplitude modulation broadcast interference assessment equipment - Google Patents
Amplitude modulation broadcast interference assessment equipment Download PDFInfo
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- CN211531106U CN211531106U CN202020544030.XU CN202020544030U CN211531106U CN 211531106 U CN211531106 U CN 211531106U CN 202020544030 U CN202020544030 U CN 202020544030U CN 211531106 U CN211531106 U CN 211531106U
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Abstract
The embodiment of the utility model discloses amplitude modulation broadcast interference assessment equipment, equipment includes: an antenna for receiving an amplitude modulated broadcast signal; the demodulation processing module is used for demodulating the amplitude modulation broadcast signal to obtain an analog modulation signal; the sampling module is used for carrying out digital sampling on the analog modulation signal to obtain a digital modulation signal; and the signal processing module is used for processing the digital modulation signal to determine the frequency spectrum component of the digital modulation signal and determining the interference evaluation parameter according to the frequency spectrum component. The embodiment of the utility model provides an amplitude modulation broadcast interference assessment equipment has realized in amplitude modulation broadcast interference technique, to interference signal's interference effect's aassessment to interference signal's interference effect ration is shown through interference assessment parameter, makes interference effect's aassessment more directly perceived and accurate, has improved the accuracy that interference effect aassessment, provides clear and definite reference for interference signal's among the amplitude modulation broadcast interference technique selection.
Description
Technical Field
The embodiment of the utility model provides a relate to communication technology field, especially relate to an amplitude modulation broadcast interference assessment equipment.
Background
Amplitude modulation broadcasting is a radio broadcasting method using an amplitude modulation technique. Amplitude modulation is a modulation method in which the frequency of a carrier is kept constant and the amplitude thereof is changed according to the change rule of a transmitted signal, and is used for long-wave, medium-wave, and short-wave broadcasting. Am broadcasting has a narrow bandwidth and can achieve a wide coverage, and thus is widely used.
In some special cases, however, the am broadcast of a certain channel is interference suppressed to avoid that the content of the am broadcast of the channel is heard. The interference suppression is to use an interference signal to interfere with a normal am broadcast, so that when the interference suppression is performed, an interference signal with a good interference effect needs to be selected, and then the interference suppression effect of the interference signal needs to be evaluated. Most of the existing interference effect evaluation methods are qualitative evaluation, and the evaluation accuracy is not high. There is also a method for evaluating interference by processing and analyzing a signal received before interference and a signal received after interference, but at present, this method is prone to error and has low evaluation accuracy.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an amplitude modulation broadcasting interference assessment equipment to the realization carries out quantitative aassessment to interfering signal's interference effect, improves the accuracy and the precision of interference assessment.
The embodiment of the utility model provides an amplitude modulation broadcast interference assessment equipment, include:
an antenna for receiving an amplitude modulated broadcast signal;
the detection processing module is used for carrying out detection processing on the amplitude modulation broadcast signal to obtain an analog modulation signal;
the sampling module is used for carrying out digital sampling on the analog modulation signal to obtain a digital modulation signal;
and the signal processing module is used for processing the digital modulation signal to determine the frequency spectrum component of the digital modulation signal and determining the interference evaluation parameter according to the frequency spectrum component.
Further, the detection processing module comprises a filter, an amplifier and a detector;
the filter is used for filtering the amplitude modulation broadcast signal;
the amplifier is used for amplifying the filtered amplitude modulation broadcast signal;
the detector is used for demodulating the amplified amplitude-modulated broadcast signal to obtain an analog modulation signal.
Further, the amplitude-modulated broadcast signal includes an original amplitude-modulated broadcast signal and a target amplitude-modulated broadcast signal, where the target amplitude-modulated broadcast signal is an amplitude-modulated broadcast signal obtained after the original amplitude-modulated broadcast signal is interfered by an interference signal.
Further, the detection processing module is specifically configured to:
detecting the original amplitude modulation broadcast signal to obtain a first analog modulation signal;
and carrying out detection processing on the target amplitude modulation broadcast signal to obtain a second analog modulation signal.
Further, the sampling module comprises a first sampling unit and a second sampling unit;
the first sampling unit is used for carrying out digital sampling on the first analog modulation signal according to a first sampling rate to obtain a first digital modulation signal;
the second sampling unit is used for carrying out digital sampling on the second analog modulation signal according to a second sampling rate to obtain a second digital modulation signal.
Further, the first sampling rate is the same as the second sampling rate.
Further, the signal processing module comprises an original spectrum component determining unit, a normalizing unit and an interference parameter determining unit;
the original spectral component determining unit is configured to determine a first original spectral component of the first digital modulated signal and a second original spectral component of the second digital modulated signal;
the normalization unit is used for performing normalization processing on the first original frequency spectrum component to obtain a first frequency spectrum component, and performing normalization processing on the second original frequency spectrum component to obtain a second frequency spectrum component;
the interference parameter determination unit is configured to determine an interference evaluation parameter according to the first spectral component and the second spectral component.
The device further comprises a control module, wherein the control module is used for controlling and monitoring the working state of each module in the device.
Furthermore, the control module is provided with a display screen, and the display screen is used for displaying the interference evaluation parameters.
Furthermore, the device also comprises a power supply module which is used for providing stable working power supply for each module in the device.
The embodiment of the utility model provides an amplitude modulation broadcast interference assessment equipment has realized in amplitude modulation broadcast interference technique, to interference signal's interference effect's aassessment to interference signal's interference effect ration is shown through interference assessment parameter, makes interference effect's aassessment more directly perceived and accurate, has improved the accuracy that interference effect aassessment, provides clear and definite reference for interference signal's among the amplitude modulation broadcast interference technique selection.
Drawings
Fig. 1 is a schematic structural diagram of an am broadcast interference evaluation device according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an am broadcast interference evaluation device according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of an am broadcast interference evaluation device according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic structural diagram of an am broadcast interference evaluation device according to an embodiment of the present invention, which is applicable to evaluating an interference effect of am broadcast interference. As shown in fig. 1, an am broadcast interference evaluating apparatus according to a first embodiment of the present invention includes: the antenna 100, the detection processing module 200, the sampling module 300 and the signal processing module 400, wherein the antenna 100 is used for receiving an amplitude modulation broadcast signal; the detection processing module 200 is configured to perform detection processing on the amplitude-modulated broadcast signal to obtain an analog modulation signal; the sampling module 300 is configured to perform digital sampling on the analog modulation signal to obtain a digital modulation signal; the signal processing module 400 is configured to process the digitally modulated signal to determine spectral components of the digitally modulated signal and to determine interference estimation parameters based on the spectral components.
An amplitude modulated broadcast signal is a wave signal whose carrier frequency is constant and whose carrier amplitude changes according to the change rule of the modulated signal, the modulated signal is a low-frequency signal transformed from original information (e.g. voice information), and the carrier is also called a modulated signal. In a radio apparatus, the antenna 100 is a component for transmitting or receiving electromagnetic waves, so an amplitude modulated broadcast signal is generally received through the antenna 100. The am broadcast signals received by the antenna 100 include normal am broadcast signals without interference, which are referred to as original am broadcast signals, and am broadcast signals interfered by the interference signals, which are referred to as target am broadcast signals.
After receiving the amplitude modulation broadcast signal, the antenna 100 transmits the amplitude modulation broadcast signal to the detection processing module 200, and the detection processing module 200 performs detection processing on the amplitude modulation broadcast signal to extract a modulation signal carrying original information in the amplitude modulation broadcast signal. The detection process is a process of detecting a modulated signal from the modulated signal, and this process is also generally called a demodulation operation. An amplitude-modulated broadcast signal or a modulated signal obtained by detection processing is a continuous physical quantity in time or in numerical value, and such a physical quantity is generally called an analog signal, so that the modulated signal obtained by detection processing is called an analog modulated signal.
Since the analog modulation signal needs to be converted into a digital signal, which is a discrete physical quantity in terms of time and quantity, the analog modulation signal output from the detection processing module 200 is transmitted to the sampling module 300, and the sampling module 300 converts the analog modulation signal into a digital modulation signal by digitally sampling the analog modulation signal.
The digital modulation signal output by the sampling module 300 is transmitted to the signal processing module 400, and the signal processing module 400 obtains the interference evaluation parameter by performing correlation processing on the frequency spectrum component of the digital modulation signal. The spectrum refers to the variation of the amplitude of a signal with frequency, and usually the variation of the amplitude of a signal with frequency is represented by a graph, that is, a spectrogram, on which a point is called a spectral component, corresponding to an amplitude and a frequency. The interference evaluation parameter is a quantitative evaluation of the interference effect of the interference signal on the amplitude-modulated broadcast signal, and the quality of the interference effect of the interference signal can be determined according to the value of the interference evaluation parameter. If the effective interference to the amplitude-modulated broadcast signal is to be realized, the interference signal corresponding to the larger interference evaluation parameter should be selected.
The embodiment of the utility model provides an amplitude modulation broadcast interference assessment equipment has realized in amplitude modulation broadcast interference technique, to interference signal's interference effect's aassessment to interference signal's interference effect ration is shown through interference assessment parameter, makes interference effect's aassessment more directly perceived and accurate, has improved the accuracy that interference effect aassessment, provides clear and definite reference for interference signal's among the amplitude modulation broadcast interference technique selection.
Example two
Fig. 2 is a schematic structural diagram of an am broadcast interference evaluation device according to a second embodiment of the present invention, which is further detailed in the present embodiment. As shown in fig. 2, the amplitude modulation broadcast interference evaluation apparatus provided in the present embodiment includes: the antenna 100, the detection processing module 200, the sampling module 300 and the signal processing module 400, wherein the detection processing module 200 includes a filter 210, an amplifier 220 and a detector 230, the sampling module 300 includes a first sampling unit 310 and a second sampling unit 320, and the signal processing module 400 includes an original spectral component determining unit 410, a normalizing unit 420 and an interference parameter determining unit 430.
After receiving the amplitude-modulated broadcast signal, the antenna 100 transmits the amplitude-modulated broadcast signal to the detection processing module 200, where the amplitude-modulated broadcast signal is first filtered by the filter 210 in the detection processing module 200 to filter out harmonic components, then amplified by the amplifier 220, and finally output an analog modulation signal by envelope detection of the detector 230. The amplitude modulation broadcast signal comprises an original amplitude modulation broadcast signal and a target amplitude modulation broadcast signal, the original amplitude modulation broadcast signal refers to a normal and undisturbed amplitude modulation broadcast signal, and the target amplitude modulation broadcast signal is an amplitude modulation broadcast signal obtained after the original amplitude modulation broadcast signal is interfered by using an interference signal. The detection processing module 200 performs detection processing on the original amplitude modulation broadcast signal and outputs a first analog modulation signal, and the detection processing module 200 performs detection processing on the target amplitude modulation broadcast signal and outputs a second analog modulation signal.
The first sampling unit 310 in the sampling module 300 receives the first analog modulation signal, performs digital sampling on the first analog modulation signal, and converts the continuous first analog modulation signal into a discrete first digital modulation signal. The first sampling unit 310 performs digital sampling on the first analog modulation signal according to a first sampling rate and a first preset sampling number, where the first sampling rate is a frequency of sampling the first analog modulation signal, a reciprocal of the first sampling rate may represent a first sampling interval period, and the first preset sampling number is a number of points of sampling the first analog modulation signal. The first sampling rate and the first preset sampling number can be preset according to actual needs.
The second sampling unit 320 in the sampling module 300 samples the second analog modulation signal, and performs digital sampling on the second analog modulation signal, so as to convert the continuous second analog modulation signal into a discrete second digital modulation signal. The second sampling unit 320 performs digital sampling on the second analog modulation signal according to a second sampling rate and a second preset sampling number, where the second sampling rate is a frequency of sampling the second analog modulation signal, a reciprocal of the second sampling rate may represent a second sampling interval period, and the second preset sampling number is a number of points of sampling the second analog modulation signal. Wherein the second sampling rate should be kept the same as the first sampling rate, and the second predetermined number of samples should be kept the same as the first predetermined number of samples.
The first digital modulation signal output by the first sampling unit 310 is input to an original spectral component determining unit 410 of the signal processing module 400, and the original spectral component determining unit 410 processes the first digital modulation signal and outputs a first original spectral component. The first original spectral component is a dimensional expression, and for convenience of calculation, the normalization unit 420 normalizes the first original spectral component to convert the dimensional first original spectral component into a dimensionless first spectral component. Normalization is a simplified calculation mode, and is to transform a dimensional expression into a dimensionless expression, which becomes a scalar.
The second digital modulation signal output by the second sampling unit 320 is input to the original spectral component determining unit 410 of the signal processing module 400, and the original spectral component determining unit 410 processes the second digital modulation signal and outputs a second original spectral component. The second original spectral component is a dimensional expression, and for convenience of calculation, the normalization unit 420 normalizes the second original spectral component to convert the dimensional second original spectral component into a dimensionless second spectral component.
The interference parameter determining unit 430 obtains an interference evaluation parameter by processing the first frequency spectrum component and the second frequency spectrum component, and can implement quantitative analysis on the interference effect of the interference signal according to the interference evaluation parameter. The larger the interference evaluation parameter is, the larger the difference between the target amplitude modulation broadcast signal and the original amplitude modulation broadcast signal is, and the better the interference effect of the interference signal is; the smaller the interference evaluation parameter, the smaller the difference between the representative target amplitude-modulated broadcast signal and the original amplitude-modulated broadcast signal, i.e. the closer the target amplitude-modulated broadcast signal is to the original amplitude-modulated broadcast signal, the worse the interference effect of the interfering signal.
The embodiment of the utility model provides an amplitude modulation broadcast interference assessment equipment has realized in amplitude modulation broadcast interference technique, to interference signal's interference effect's aassessment to interference signal's interference effect ration is shown through interference assessment parameter, makes interference effect's aassessment more directly perceived and accurate, has improved the accuracy that interference effect aassessment, provides clear and definite reference for interference signal's among the amplitude modulation broadcast interference technique selection.
EXAMPLE III
Fig. 3 is a schematic structural diagram of an am broadcast interference evaluation device according to a third embodiment of the present invention, which is further optimized for the above-mentioned embodiments. As shown in fig. 3, the amplitude modulation broadcast interference evaluation apparatus provided in the present embodiment includes: the antenna 100, the detection processing module 200, the sampling module 300, the signal processing module 400, the control module 500, and the power module 600, wherein functions and structures of the antenna 100, the detection processing module 200, the sampling module 300, and the signal processing module 400 are the same as those in the above embodiments, and are not described herein again.
The control module 500 is connected to the detection processing module 200, the sampling module 300 and the signal processing module 400 respectively, and is used for controlling and monitoring the working states of the modules in the am broadcast interference assessment apparatus. The control module 500 is provided with a display screen 510, and the display screen 510 can display the working state and the interference evaluation parameters of each module.
The power module 600 is used to provide stable operating power for the modules in the am broadcast interference assessment device. The power module 600 may be connected to the control module 500, and then provide stable operating power to each module in the am broadcast interference evaluation device through the control module 500, or the power module 600 may be directly connected to each module in the am broadcast interference evaluation device to provide stable operating power.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. An amplitude modulated broadcast interference assessment device, comprising:
an antenna for receiving an amplitude modulated broadcast signal;
the detection processing module is used for carrying out detection processing on the amplitude modulation broadcast signal to obtain an analog modulation signal;
the sampling module is used for carrying out digital sampling on the analog modulation signal to obtain a digital modulation signal;
and the signal processing module is used for processing the digital modulation signal to determine the frequency spectrum component of the digital modulation signal and determining the interference evaluation parameter according to the frequency spectrum component.
2. The apparatus of claim 1, wherein the detection processing module comprises a filter, an amplifier, and a detector;
the filter is used for filtering the amplitude modulation broadcast signal;
the amplifier is used for amplifying the filtered amplitude modulation broadcast signal;
the detector is used for demodulating the amplified amplitude-modulated broadcast signal to obtain an analog modulation signal.
3. The apparatus of claim 2, wherein the amplitude-modulated broadcast signal comprises an original amplitude-modulated broadcast signal and a target amplitude-modulated broadcast signal, wherein the target amplitude-modulated broadcast signal is an amplitude-modulated broadcast signal obtained after interfering with the original amplitude-modulated broadcast signal using an interfering signal.
4. The device of claim 3, wherein the detection processing module is specifically configured to:
detecting the original amplitude modulation broadcast signal to obtain a first analog modulation signal;
and carrying out detection processing on the target amplitude modulation broadcast signal to obtain a second analog modulation signal.
5. The device of claim 4, wherein the sampling module comprises a first sampling unit and a second sampling unit;
the first sampling unit is used for carrying out digital sampling on the first analog modulation signal according to a first sampling rate to obtain a first digital modulation signal;
the second sampling unit is used for carrying out digital sampling on the second analog modulation signal according to a second sampling rate to obtain a second digital modulation signal.
6. The device of claim 5, wherein the first sampling rate is the same as the second sampling rate.
7. The apparatus of claim 5, wherein the signal processing module comprises an original spectral component determining unit, a normalizing unit, and an interference parameter determining unit;
the original spectral component determining unit is configured to determine a first original spectral component of the first digital modulated signal and a second original spectral component of the second digital modulated signal;
the normalization unit is used for performing normalization processing on the first original frequency spectrum component to obtain a first frequency spectrum component, and performing normalization processing on the second original frequency spectrum component to obtain a second frequency spectrum component;
the interference parameter determination unit is configured to determine an interference evaluation parameter according to the first spectral component and the second spectral component.
8. The apparatus of any one of claims 1-6, further comprising a control module for controlling and monitoring the operational status of modules within the apparatus.
9. The apparatus of claim 8, wherein the control module is provided with a display screen for displaying the disturbance evaluation parameter.
10. The device of any one of claims 1-6, further comprising a power module to provide stable operating power to modules within the device.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111385046A (en) * | 2020-04-14 | 2020-07-07 | 北京航天广通科技有限公司 | Amplitude modulation broadcast interference assessment method and equipment |
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| CN111385046A (en) * | 2020-04-14 | 2020-07-07 | 北京航天广通科技有限公司 | Amplitude modulation broadcast interference assessment method and equipment |
| CN111385046B (en) * | 2020-04-14 | 2024-10-01 | 北京航天广通科技有限公司 | Amplitude modulation broadcast interference assessment method and device |
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