Device for detecting influence of adjacent frequency interference signal on Beidou RDSS outbound signal

Abstract

The utility model discloses a device for detecting the influence of an adjacent frequency interference signal on a Beidou RDSS outbound signal, and belongs to the technical field of satellite short message communication. The system comprises an RDSS communication module part and an adjacent frequency interference analysis part. The RDSS communication module part comprises an RDSS baseband module, an RDSS radio frequency module, an antenna module and a serial port communication module used for communicating with the MCU; wherein the serial port communication module is bidirectionally connected with the MCU module; the antenna module, the RDSS radio frequency module and the RDSS baseband module are sequentially connected and are used for acquiring an outbound signal of the RDSS, and an output end serial port communication module of the RDSS baseband module is bidirectionally interconnected and is used for outputting a carrier-to-noise ratio and an original telegraph text of the outbound signal. The device is free of installation and convenient to operate; moreover, the method is not limited by the transmitting frequency of the Beidou RDSS, the test time is short, and the efficiency is high.

Description

Technical Field

[0001] The utility model relates to the field of satellite short message communication, in particular to a device for detecting the influence of adjacent frequency interference signals on Beidou RDSS outbound signals. Background Art

[0002] At present, the operating frequency of Beidou RDSS outbound signal is 2491.75±8.16MHz, which is close to the common Bluetooth, WiFi, and 4G / 5G mobile communication signals in life. Adjacent frequency signals will interfere with Beidou RDSS outbound signal and affect the success rate of RDSS satellite short message communication.

[0003] If the Beidou RDSS terminal cannot obtain the radio spectrum distribution of the installation area in advance, it can only verify whether the terminal installation environment is suitable by testing after installation. Testing the success rate of RDSS satellite communication short messages requires sending and receiving multiple satellite short messages with a time interval of more than one minute, which generally takes more than 20 minutes. If the test fails, the terminal needs to change the installation location, which will increase the installation cost and cause waste of resources. Utility Model Content

[0004] In view of this, in order to facilitate the test of the impact of adjacent-frequency interference signals in the installation area on the Beidou RDSS outbound signal, the utility model provides a new device for detecting the impact of adjacent-frequency interference signals on the Beidou RDSS outbound signal. The device is not only installation-free and easy to operate, but also not limited by the Beidou RDSS transmission frequency, with short test time and high efficiency.

[0005] The technical solution provided by the utility model is as follows:

[0006] A device for detecting the influence of an adjacent-frequency interference signal on a Beidou RDSS outbound signal, comprising an RDSS communication module part and an adjacent-frequency interference analysis part;

[0007] The RDSS communication module includes an RDSS baseband module, an RDSS radio frequency module, an antenna module, and a serial communication module for communicating with the MCU; the serial communication module is bidirectionally connected to the MCU module;

[0008] The antenna module, RDSS radio frequency module and RDSS baseband module are connected in sequence to obtain the outbound signal of RDSS, wherein the output end serial communication module of the RDSS baseband module is bidirectionally interconnected to output the carrier-to-noise ratio and original message of the outbound signal;

[0009] The adjacent-channel interference analysis part includes an MCU module and a liquid crystal display module for displaying the detection results; the MCU module serial communication module is bidirectionally connected to exchange the carrier-to-noise ratio and the original message of the outbound signal, and calculate the average value, mean square error and bit error rate of the carrier-to-noise ratio within 2 minutes and the original message; the MCU module is connected to the liquid crystal display module to output the carrier-to-noise ratio and bit error rate of the outbound signal to the liquid crystal display module.

[0010] Furthermore, the RDSS communication module part and the adjacent-channel interference analysis part also include a power supply module for power supply. The function of the power supply module is to convert the voltage of the built-in lithium battery into different working voltages for normal operation of each circuit.

[0011] From the above description, it can be seen that the beneficial effects of the technical solution of the utility model are:

[0012] 1. The device for detecting the influence of adjacent-frequency interference signals on Beidou RDSS outbound signals of the utility model adopts a card-free testing method, and can be tested without relying on Beidou cards, thereby increasing the convenience of Beidou RDSS equipment installation and testing installation environment.

[0013] 2. The device for detecting the influence of adjacent-frequency interference signals on Beidou RDSS outbound signals of the utility model has a built-in battery and displays the results through an integrated display screen. It does not require installation and wiring, thus reducing the man-hours for Beidou RDSS equipment installation adjustments due to inappropriate locations.

[0014] 3. The device for detecting the influence of adjacent-frequency interference signals on Beidou RDSS outbound signals of the utility model mainly evaluates the influence of adjacent-frequency interference signals by analyzing the quality of outbound signals, does not adopt conventional communication transceiver operations, is not limited by the Beidou RDSS communication transmission frequency, can reduce detection time, and increase work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to describe this patent more clearly, one or more drawings are provided below, which are intended to assist in explaining the background technology, technical principles and / or certain specific implementation plans of this patent.

[0016] Figure 1 It is a circuit schematic diagram of the RDSS communication module part of the utility model;

[0017] Figure 2 It is the circuit principle diagram of the adjacent frequency interference analysis part of the utility model; DETAILED DESCRIPTION

[0018] The device of this embodiment is divided into an RDSS communication module part and an adjacent frequency interference analysis part: the RDSS communication module part is composed of an RDSS baseband module, an RDSS radio frequency module, an antenna module, a serial communication module and a power module I; the adjacent frequency interference analysis part is composed of an MCU module, a liquid crystal display module and a power module II; wherein,

[0019] The antenna module of the RDSS communication module can obtain the 1.6GHz Beidou RDSS signal in the air and transmit it to the RDSS radio frequency module through a coaxial cable;

[0020] The RDSS radio frequency module of the RDSS communication module down-converts the 1.6GHz Beidou RDSS signal into a 62MHz analog intermediate frequency signal and transmits it to the RDSS baseband module;

[0021] The RDSS baseband module of the RDSS communication module obtains the carrier-to-noise ratio and original message of the Beidou RDSS outbound signal by processing the 62MHz analog intermediate frequency signal, and transmits the result to the adjacent frequency interference analysis part through the serial communication module;

[0022] The serial communication module main control chip of the RDSS communication module part is AT3232ESE, which is used for the RDSS communication module part to carry out serial communication with the adjacent frequency interference analysis part;

[0023] The power module I of the RDSS communication module part is used to convert the 4.2V of the lithium battery into supply voltages of 3.3VDC, 1.8VDC and 1.0VDC, which are used to power the various modules of the RDSS communication module part.

[0024] The MCU module of the adjacent channel interference analysis part is used to exchange the carrier-to-noise ratio and the original message of the outbound signal through the serial port, calculate the bit error rate of the original message, and output the carrier-to-noise ratio and bit error rate of the outbound signal to the liquid crystal display module.

[0025] The adjacent-channel interference analysis part calculates the average value and mean square error of the Beidou RDSS outbound signal carrier-to-noise ratio as a basis for determining whether the adjacent-channel interference in the test environment will affect the normal operation of the Beidou outbound signal.

[0026] The adjacent-channel interference analysis part calculates the bit error rate of the original message of the Beidou RDSS outbound signal as a basis for determining whether the adjacent-channel interference in the test environment will affect the normal operation of the Beidou outbound signal. It is powered by a built-in lithium battery and outputs the adjacent-channel interference results to the LCD screen.

[0027] The LCD display module of the adjacent channel interference analysis part is a LCD display with a resolution of 128*64, and the parallel port driver is used to display the carrier-to-noise ratio and bit error rate of the RDSS outbound signal;

[0028] The power supply module II of the adjacent frequency interference analysis part is used to convert the 4.2V of the lithium battery into a power supply voltage of 3.3VDC used by the MCU module and the liquid crystal display module.

[0029] The workflow of the RDSS communication module is as follows:

[0030] 1. The antenna module obtains the 1.6GHz Beidou RDSS outbound signal in the air and transmits it to the RDSS RF module through a coaxial cable;

[0031] 2. The RDSS RF module down-converts the 1.6GHz Beidou RDSS signal into a 62MHz analog intermediate frequency signal and transmits it to the RDSS baseband module;

[0032] 3. The RDSS baseband module obtains the carrier-to-noise ratio and original message of the Beidou RDSS outbound signal by processing the 62MHz analog intermediate frequency signal, and transmits the result to the adjacent frequency interference analysis part through the serial communication module;

[0033] The workflow of the adjacent channel interference analysis part: The MCU module is used to exchange the carrier-to-noise ratio and original message of the outbound signal through the serial port, calculate the average value, mean square error and bit error rate of the carrier-to-noise ratio within 2 minutes, and output the results to the LCD display module.

Claims

1. A device for detecting the impact of adjacent-frequency interference signals on Beidou RDSS outbound signals, characterized in that: It includes RDSS communication module part and adjacent frequency interference analysis part; The RDSS communication module includes an RDSS baseband module, an RDSS radio frequency module, an antenna module, and a serial communication module for communicating with the MCU; the serial communication module is bidirectionally connected to the MCU module; The antenna module, RDSS radio frequency module and RDSS baseband module are connected in sequence to obtain the outbound signal of RDSS, wherein the output end serial communication module of the RDSS baseband module is bidirectionally interconnected to output the carrier-to-noise ratio and original message of the outbound signal; The adjacent-channel interference analysis part includes an MCU module and a liquid crystal display module for displaying the detection results; the MCU module serial communication module is bidirectionally connected to exchange the carrier-to-noise ratio and the original message of the outbound signal, and calculate the average value, mean square error and bit error rate of the carrier-to-noise ratio within 2 minutes and the original message; the MCU module is connected to the liquid crystal display module to output the carrier-to-noise ratio and bit error rate of the outbound signal to the liquid crystal display module.

2. A device for detecting the influence of adjacent frequency interference signals on Beidou RDSS outbound signals according to claim 1, characterized in that: The RDSS communication module part and the adjacent-channel interference analysis part both include a power supply module for power supply; the power supply module converts the voltage of the built-in lithium battery into different working voltages for normal operation of each circuit.

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