CN212624553U - Teaching demonstration model for satellite positioning receiver front-end radio frequency signal processing - Google Patents
Teaching demonstration model for satellite positioning receiver front-end radio frequency signal processing Download PDFInfo
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- CN212624553U CN212624553U CN202021713742.6U CN202021713742U CN212624553U CN 212624553 U CN212624553 U CN 212624553U CN 202021713742 U CN202021713742 U CN 202021713742U CN 212624553 U CN212624553 U CN 212624553U
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Abstract
The utility model discloses a teaching demonstration model for satellite positioning receiver front-end radio frequency signal processing, which comprises a computer, an input signal generator, a low-noise amplification module, a down-conversion processing module, a filtering processing module and an AD conversion module which are sequentially connected with signals, wherein the input signal generator, the low-noise amplification module, the down-conversion processing module, the filtering processing module and the AD conversion module are equally distributed with adaptive signal acquisition cards, and the signal acquisition cards are equally distributed with independent display screen signals; compared with the prior art, the utility model discloses with satellite navigation receiver front end signal processing part, structurally, each component part that wherein has independent function carries out the independent show design of modularization, on data processing, shows waveform or data in every module working process in real time, and audio-visual thorough show theory of operation, workflow to and the signal change of each processing part makes things convenient for the teacher to explain and the student understands.
Description
Technical Field
The utility model belongs to the technical field of the navigation teaching, in particular to satellite positioning receiver front end radio frequency signal processing teaching show model.
Background
A satellite navigation receiver is a terrestrial user receiving part of a satellite navigation system, and is a terminal using navigation technology. In order to improve the correctness and accuracy of the Beidou navigation receiver and ensure reliable and real-time processing of satellite signals, the prior art adopts corresponding measures to reduce noise interference brought by the satellite signals so as to ensure that the error of an output positioning result is within an acceptable range, and an important part for realizing the function is a front-end signal processing module of the positioning receiver, namely a radio frequency front-end chip in the positioning receiver, wherein the function of the front-end signal processing module is mainly to amplify, down-convert, filter and analog-to-digital convert a weak signal received by an antenna and then transmit the weak signal to a rear-stage baseband chip for processing, if the received signal is not subjected to a series of front-end processing, the correctness and accuracy of a signal or data obtained after the rear-stage processing cannot be ensured, so the front-end processing is very important, and the prior art has already amplified, processed and processed by the front-end signal, The down-conversion, the filtration and the analog-to-digital conversion part are all integrated into a chip, which is a great improvement in the technology, but in the navigation teaching process, a student sees the packaged chip, the working principle and the working flow inside the chip can not be known, and the signal change of each part processing stage is unavailable, so that the student is necessary to aim at the teaching purpose, a set of display model for the satellite positioning receiver front-end signal processing is designed, the working principle and the working flow of the satellite positioning receiver front-end signal processing and the signal change of each part processing stage are visually displayed, and the student can have a learning platform which is more intuitive and easier to understand and observe.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a technical scheme:
a teaching display model for front-end radio frequency signal processing of a satellite positioning receiver comprises an input signal setting computer, an input signal generator, a low-noise amplification module, a down-conversion processing module, a filtering processing module and an AD conversion module which are sequentially in signal connection, wherein the input signal generator, the low-noise amplification module, the down-conversion processing module, the filtering processing module and the AD conversion module are respectively in signal connection with respective independent adaptive signal acquisition cards, and each signal acquisition card is respectively in signal connection with respective independent display screens;
the input signal setting computer is used for setting specific parameters of the input signal, such as waveform, amplitude, period, frequency and other related parameters;
the input signal generator is used for generating a required signal according to setting;
the low-noise amplification module is used for amplifying the signal with a very low noise coefficient;
the down-conversion processing module is used for performing frequency down-conversion processing on the signals;
the filtering processing module is used for further filtering processing of the signals;
the AD conversion module is used for converting the signals from analog signals into digital signals;
the signal acquisition card is used for acquiring signals of the signal connecting part and outputting the acquired signals to the display screen;
the display screen is used for displaying signals output by the acquisition card;
furthermore, if the input signal generator, the low-noise amplification module, the down-conversion processing module, the filtering processing module and the AD conversion module are provided with a signal monitoring interface, a signal acquisition card can be omitted, the input signal generator is directly connected with a display screen signal, and the signal is directly output to the display screen.
Furthermore, the display screen can be respectively configured with one display screen in one-to-one correspondence with the input signal generator, the low-noise amplification module, the down-conversion processing module, the filtering processing module and the AD conversion module, or only one display screen is configured to perform switching display at fixed time intervals.
Description of the drawings: and the low-noise amplification module is used for carrying out amplification processing with a very low noise coefficient. Generally, the high-frequency or intermediate-frequency preamplifier is used for various radio receivers, and in the case of amplifying a weak signal, the interference of the noise of the preamplifier to the signal during amplification processing may be serious, so that it is desirable to reduce the noise to improve the signal-to-noise ratio of the output.
The working principle is as follows: firstly, a teacher or a student uses an input signal setting computer to set specific parameters of an initial signal, such as waveform, amplitude, period, frequency and other related parameters; after the setting is finished, the input signal generator generates required signals according to specific setting, the signals are sequentially transmitted according to the sequence of the low-noise amplification module, the down-conversion processing module, the filtering processing module and the AD conversion module, the signals of the input signal generator, the low-noise amplification module, the down-conversion processing module, the filtering processing module and the AD conversion module which are connected with the signals are acquired in real time by the adaptive signal acquisition card during the whole signal transmission period, and the acquired signals are synchronously displayed through independent display screens.
Compared with the prior art, the utility model discloses with satellite navigation receiver front end signal processing part, structurally, each component part that wherein has independent function carries out the independent show design of modularization, on data processing, with the wave form or the data real-time display in every module working process, just so with satellite positioning receiver front end signal processing's theory of operation, workflow to and the signal change of each processing part, audio-visual thorough show makes things convenient for the teacher to explain and the student understands.
Drawings
For ease of illustration, the invention is described in detail by the following detailed description and accompanying drawings.
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic layout diagram of an embodiment of the present invention;
in the figure: 1-input signal setting computer, 2-input signal generator, 3-low noise amplification module, 4-down conversion processing module, 5-filtering processing module, 6-AD conversion module, 7-signal acquisition card, 8-display screen and 9-model placing platform.
Detailed Description
Example 1
A teaching display model for front-end radio frequency signal processing of a satellite positioning receiver comprises an input signal setting computer, an input signal generator, a low-noise amplification module, a down-conversion processing module, a filtering processing module and an AD conversion module which are sequentially in signal connection, wherein the input signal generator, the low-noise amplification module, the down-conversion processing module, the filtering processing module and the AD conversion module are respectively in signal connection with respective independent adaptive signal acquisition cards, and each signal acquisition card is respectively in signal connection with respective independent display screens;
the input signal setting computer is used for setting specific parameters of the input signal, such as waveform, amplitude, period, frequency and other related parameters;
the input signal generator is used for generating a required signal according to setting;
the low-noise amplification module is used for amplifying the signal with a very low noise coefficient;
the down-conversion processing module is used for performing frequency down-conversion processing on the signals;
the filtering processing module is used for further filtering processing of the signals;
the AD conversion module is used for converting the signals from analog signals into digital signals;
the signal acquisition card is used for acquiring signals of the signal connecting part and outputting the acquired signals to the display screen;
the display screen is used for displaying signals output by the acquisition card;
description of the drawings: and the low-noise amplification module is used for carrying out amplification processing with a very low noise coefficient. Generally, the high-frequency or intermediate-frequency preamplifier is used for various radio receivers, and in the case of amplifying a weak signal, the interference of the noise of the preamplifier to the signal during amplification processing may be serious, so that it is desirable to reduce the noise to improve the signal-to-noise ratio of the output.
The utility model discloses an it is used for the teaching, so to the precision of each part and the anti-interference performance requirement general, the lectotype requirement is wider, on the basis that satisfies basic function, the main hardware equipment and the parameter of reference, as shown in the following table.
Example 2
This example is a simplified scheme based on the best standard scheme of example 1, and aims to reduce the volume of the display model and further reduce the matching cost.
The main simplification is as follows:
according to the scheme (1), when the input signal generator, the low-noise amplification module, the down-conversion processing module, the filtering processing module and the AD conversion module are selected, the model with the signal monitoring interface is selected, so that the signal acquisition card is not needed, the signal acquisition card is directly connected with a display screen, and the signal of the display screen is directly output to the display screen.
In the scheme (2), a plurality of display screens are respectively configured in a one-to-one correspondence with the input signal generator, the low-noise amplification module, the down-conversion processing module, the filtering processing module and the AD conversion module, and switching display at fixed time intervals is performed by adopting a scheme of only configuring one display screen.
The scheme of embodiment 1 is still adopted in other parts, the simplification parts (1) and (2) can be used independently, or (1) and (2) can be used simultaneously for simplification.
Example 3
The embodiment is an optimization scheme performed on the basis of the scheme of the embodiment 1 or the embodiment 2, and aims to further optimize the layout and the use convenience of the display model.
The specific optimization scheme is as follows: and (4) displaying an input signal setting computer in the model, using a tablet computer, embedding and installing the tablet computer and other parts on the model placing platform, wherein the other parts are unchanged.
The utility model discloses the theory of operation: firstly, a teacher or a student uses an input signal setting computer to set specific parameters of an initial signal, such as waveform, amplitude, period, frequency and other related parameters; after the setting is finished, the input signal generator generates required signals according to specific setting, the signals are sequentially transmitted according to the sequence of the low-noise amplification module, the down-conversion processing module, the filtering processing module and the AD conversion module, the signals of the input signal generator, the low-noise amplification module, the down-conversion processing module, the filtering processing module and the AD conversion module which are connected with the signals are acquired in real time by the adaptive signal acquisition card during the whole signal transmission period, and the acquired signals are synchronously displayed through independent display screens.
Compared with the prior art, the utility model discloses with satellite navigation receiver front end signal processing part, structurally, each component part that wherein has independent function carries out the independent show design of modularization, on data processing, with the wave form or the data real-time display in every module working process, just so with satellite positioning receiver front end signal processing's theory of operation, workflow to and the signal change of each processing part, audio-visual thorough show makes things convenient for the teacher to explain and the student understands.
Having shown and described the basic principles, essential features and advantages of the invention, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are merely illustrative of the principles of the invention, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, as claimed herein.
Claims (1)
1. A teaching and displaying model for front-end radio frequency signal processing of a satellite positioning receiver is characterized by comprising an input signal setting computer, an input signal generator, a low-noise amplification module, a down-conversion processing module, a filtering processing module and an AD conversion module which are sequentially in signal connection, wherein the input signal generator, the low-noise amplification module, the down-conversion processing module, the filtering processing module and the AD conversion module are respectively in signal connection with signal acquisition cards which are respectively independent and adaptive, and the signal acquisition cards are respectively in signal connection with respective independent display screens;
the input signal setting computer is used for setting specific parameters of the input signal;
the input signal generator is used for generating a required signal according to setting;
the low-noise amplification module is used for amplifying the signal with a very low noise coefficient;
the down-conversion processing module is used for performing frequency down-conversion processing on the signals;
the filtering processing module is used for carrying out filtering processing on the signals;
the AD conversion module is used for converting the signals from analog signals into digital signals;
the signal acquisition card is used for acquiring signals of the signal connecting part and outputting the acquired signals to the display screen;
and the display screen is used for displaying the signals output by the acquisition card.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021713742.6U CN212624553U (en) | 2020-08-17 | 2020-08-17 | Teaching demonstration model for satellite positioning receiver front-end radio frequency signal processing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021713742.6U CN212624553U (en) | 2020-08-17 | 2020-08-17 | Teaching demonstration model for satellite positioning receiver front-end radio frequency signal processing |
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| CN212624553U true CN212624553U (en) | 2021-02-26 |
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| CN202021713742.6U Expired - Fee Related CN212624553U (en) | 2020-08-17 | 2020-08-17 | Teaching demonstration model for satellite positioning receiver front-end radio frequency signal processing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114283667A (en) * | 2021-11-16 | 2022-04-05 | 中国人民解放军战略支援部队航天工程大学士官学校 | Maintenance teaching device of satellite navigation receiver |
| CN114283667B (en) * | 2021-11-16 | 2024-05-03 | 中国人民解放军战略支援部队航天工程大学士官学校 | Maintenance teaching device of satellite navigation receiver |
-
2020
- 2020-08-17 CN CN202021713742.6U patent/CN212624553U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114283667A (en) * | 2021-11-16 | 2022-04-05 | 中国人民解放军战略支援部队航天工程大学士官学校 | Maintenance teaching device of satellite navigation receiver |
| CN114283667B (en) * | 2021-11-16 | 2024-05-03 | 中国人民解放军战略支援部队航天工程大学士官学校 | Maintenance teaching device of satellite navigation receiver |
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| CF01 | Termination of patent right due to non-payment of annual fee |