CN110636449A - Waveform loading method - Google Patents
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- CN110636449A CN110636449A CN201910930963.4A CN201910930963A CN110636449A CN 110636449 A CN110636449 A CN 110636449A CN 201910930963 A CN201910930963 A CN 201910930963A CN 110636449 A CN110636449 A CN 110636449A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/024—Guidance services
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Abstract
The application provides a waveform loading method, which comprises the following steps: performing multivariate autocorrelation detection processing on the detected signals by correlation difference on time and frequency bands to obtain a communication navigation waveform type; and according to the type of the communication navigation waveform, modulating the detected signal by calling a software radio library.
Description
Technical Field
The invention belongs to the aviation radio communication technology, and particularly relates to a waveform loading method.
Background
The aviation communication navigation system is a necessary component in an aviation electronic system, is responsible for communication, coordination, navigation lines and the like between an aircraft and ground, air and related equipment, mainly transmits radio waveforms through radio equipment to complete related operations, and the aviation radio waveforms have fixed frequency bands, power ranges, related modulation modes and coding modes according to the international civil aviation communication navigation standard.
The integrated aviation radio communication and navigation platform is one distributed aviation radio universal platform capable of being loaded dynamically and consists of several RF channels and several digital channels for loading different aviation navigation communication waveforms.
In recent years, great achievements are made in the design aspect of aviation radio communication navigation electronic systems at home and abroad, the generalization of a radio waveform verification platform is the basis of the current aviation communication navigation platform. How to rapidly identify navigation communication waveforms and automatically add and remove carriers is formed into one direction in the current aviation field.
Disclosure of Invention
In order to realize the dynamic loading and unloading functions of the aviation radio communication navigation system platform, the hardware platform system has the functions of meeting most aviation radio modulation and demodulation, has a modularized software radio design, and can dynamically combine the modulation and demodulation modes of radio waveforms, including modules of coding, decoding, filtering, demodulation, modulation and the like. And judging the communication navigation waveform according to the autocorrelation characteristics of the received radio waveform, and dynamically loading the radio communication navigation waveform in the platform according to the analysis result.
The application provides a waveform loading method, which comprises the following steps:
performing multivariate autocorrelation detection processing on the detected signals by correlation difference on time and frequency bands to obtain a communication navigation waveform type;
and according to the type of the communication navigation waveform, modulating the detected signal by calling a software radio library.
Optionally, the performing multivariate autocorrelation detection processing on the detected signal to obtain the type of the communication navigation waveform specifically includes:
performing over-sampling processing on the detected signal to obtain a sampling signal;
extracting second-order autocorrelation parameters of the sampling signal by using the time difference;
extracting third-order autocorrelation parameters of the sampling signal by using a frequency spectrum difference;
and comparing the second-order autocorrelation parameters and the third-order autocorrelation parameters with an aviation communication navigation waveform parameter library to determine the communication navigation waveform type of the detected signal.
Optionally, the software radio library includes a radio frequency channel, a digital channel and an intermediate frequency interaction network.
Optionally, the digital channel includes a coding library, a modulation library, a filtering library, and a demodulation library of the aviation waveform.
Optionally, the modulating the detected signal by calling a software radio library according to the type of the communication navigation waveform specifically includes:
and processing the radio frequency front end according to the communication navigation waveform type, coding, modulating, filtering and demodulating, and performing intermediate frequency interaction according to the loaded position.
Optionally, the processing the radio frequency front end according to the communication navigation waveform type specifically includes:
and controlling a radio frequency front end switch, a transmitting frequency point, a transmitting bandwidth and a data pulse according to the communication navigation waveform type.
Optionally, the method further comprises:
and monitoring the sampling signal, the second-order autocorrelation parameter and the third-order autocorrelation parameter, and displaying monitoring data.
Optionally, the method further comprises:
obtaining a modified part of modulation parameters through a man-machine interaction mode;
and carrying out modulation processing on the detected signal by combining the modulation parameters of the correction part.
The invention has the beneficial effects that:
(1) the multivariate autocorrelation characteristic detection algorithm of the radio waveform can rapidly extract waveform parameters by using correlation differences in time and frequency bands according to the multi-order autocorrelation characteristics of detected signals, rapidly detect the type of the radio waveform, and improve the real-time monitoring capability of the radio aviation waveform.
(2) The radio comprehensive universal loading platform solves the problem of dependence of aviation radio communication navigation waveforms on a hardware platform, provides a universal aviation radio waveform application platform, and comprehensively meets the operation requirements on multiple waveforms.
(3) The radio platform monitoring interaction mechanism carries out flow real-time processing monitoring through big data analysis mechanisms such as oversampling of monitoring waveforms and the like, provides an interaction mechanism, and modifies and loads different aviation radio navigation communication waveforms in real time.
Drawings
FIG. 1 is a schematic diagram of a waveform loading platform based on radio multi-element correlation characteristics according to the present invention;
FIG. 2 is a schematic diagram of a radio waveform autocorrelation detection module according to the present invention;
FIG. 3 is a schematic flow chart of a radio waveform autocorrelation detection module according to the present invention;
FIG. 4 is a schematic diagram of a waveform synthesis universal loading platform according to the present invention;
fig. 5 is a schematic diagram of a radio platform monitoring interaction module according to the present invention.
Detailed Description
The method is based on the multivariate autocorrelation characteristic of the radio waveform, analyzes and loads the navigation communication waveform in real time, automatically plans and switches the loading waveform, and completes the navigation task of the aviation communication.
Specifically, the present invention detects the autocorrelation parameters of the waveform by the multivariate correlation characteristic detection module of the radio waveform, compares the detection result with the existing aviation radio communication navigation waveform to obtain the type of the detected radio waveform, dynamically loads and manages the loading of each waveform, and controls the running state of the platform waveform in real time, as shown in fig. 1, the present invention mainly comprises the following modules: the system comprises a radio waveform autocorrelation detection module, a waveform comprehensive universal loading platform module and a radio platform monitoring interaction module.
The invention aims to be realized by the following technical scheme:
an application platform based on a radio waveform multi-element correlation characteristic detection algorithm comprises a radio comprehensive universal loading platform, a radio waveform multi-element characteristic detection module, a radio waveform dynamic loading management module and a radio waveform operation monitoring interaction module.
The invention has the following three main technical points.
(1) And designing a multivariate autocorrelation characteristic detection algorithm of the radio waveform to complete extraction of multivariate autocorrelation parameters of the aviation radio waveform, wherein the extraction mainly comprises extraction of 2-order and 3-order autocorrelation parameters. Firstly, carrying out 2-order autocorrelation processing on a detected signal, extracting 2-order autocorrelation characteristic parameters in a spectrum difference unit, carrying out detection by integrating the existing aviation specifications to determine the modulation mode of the signal, carrying out autocorrelation processing by taking the time difference as 3-order autocorrelation unit parameters, further extracting modulation parameters, then carrying out normalization processing, and determining the detected signal according to 2 groups of different parameter values.
(2) And designing a radio integrated universal loading platform which mainly completes the universal radio loading application function. The universal loading platform can load most of aviation radio navigation communication waveforms, the radio frequency transmitting and receiving part has the receiving, transmitting and modulating capacity of a multi-channel full frequency band and is connected with the digital modulation part through an intermediate frequency interaction network, and the digital modulation part has the digital modulation function, coding, digital mapping and digital demodulation function of the waveforms and directly calls the configuration function of a waveform database.
(3) Designing a radio platform monitoring loading interaction mechanism, monitoring a test waveform, carrying out real-time monitoring on the loading waveform of each radio frequency channel on a radio aviation platform, carrying out selection processing of parameter comparison after rapid extraction of a detection algorithm, and reporting the running state of the final loading waveform in real time.
The invention adopts a multivariate autocorrelation characteristic detection algorithm of radio waveforms to extract multivariate autocorrelation characteristic parameters of detected signals, distinguishes each detected signal, is completed by a radio waveform autocorrelation detection module, transmits a detection result to a waveform comprehensive universal loading platform module, completes final test waveform loading by the loading module, and a radio platform monitoring interaction module controls a monitoring module for each waveform, which is further detailed below.
(1) A radio waveform autocorrelation detection module:
the radio waveform has multi-order autocorrelation characteristics, different modulation modes and different autocorrelation characteristics, and the waveform extraction is not easily affected by noise, as shown in fig. 2, the module mainly comprises oversampling, 2-order autocorrelation, 3-order autocorrelation and an aviation communication navigation waveform parameter library. Firstly, the detected signal is subjected to oversampling processing, multipath acquisition is carried out by using a high-speed AD device, 2-order autocorrelation parameters are extracted by using time difference, and the frequency band of the waveform and the related basic waveform characteristics can be obtained by analyzing the second-order autocorrelation parameters through the time difference. And then, introducing a frequency spectrum difference by taking the center of a frequency point as a center to extract the third-order autocorrelation characteristics, and comparing each correlation parameter with an aviation communication navigation waveform parameter library to obtain which communication navigation waveform the detected signal is, wherein the specific flow is shown in fig. 3.
(2) The waveform synthesis universal loading platform module comprises:
the waveform universal loading platform mainly comprises a universal radio frequency channel, a universal digital channel and an intermediate frequency interactive network, and as shown in fig. 4, the existing software radio library is called to perform configuration management through a detection result sent by a checking module. The carrier frequency of the radio frequency channel covers the aviation full frequency band and supports various modulation modes. The digital part comprises various libraries of coding, modulation, filtering, demodulation and the like of the aviation waveform, and real-time software radio modulation adjustment is carried out on different waveforms to meet the modulation requirements of different waveforms. The detected signal calls a library, controls a radio frequency front end switch, a transmitting frequency point, a transmitting bandwidth and a data pulse according to the difference of a time domain and a frequency domain, and carries out medium frequency interaction according to a loaded position.
(3) The radio platform monitoring interaction module:
the module is mainly responsible for monitoring and processing the sampling data flow of the detected waveform. The method mainly comprises the steps of monitoring over-sampling data flow, parameter extraction monitoring, a human-computer interaction correction learning part and a platform operation monitoring part, as shown in figure 5, for monitoring of each module, real-time transmission is performed to monitoring personnel, artificial correction is performed on part of modulation parameters according to an interaction module, such as codes, modulation parts which cannot be obtained through self-correlation parameters, and the like.
It is understood that a person skilled in the art of aeronautical radio monitoring and detection may apply, according to the technical solution of the present invention and its inventive concept, the substitution or modification of equivalent equipment platforms, all of which shall fall within the scope of protection of the appended claims.
Claims (8)
1. A method of waveform loading, the method comprising:
performing multivariate autocorrelation detection processing on the detected signals by correlation difference on time and frequency bands to obtain a communication navigation waveform type;
and according to the type of the communication navigation waveform, modulating the detected signal by calling a software radio library.
2. The method according to claim 1, wherein the performing the multivariate autocorrelation detection processing on the detected signal to obtain the type of the communication navigation waveform specifically comprises:
performing over-sampling processing on the detected signal to obtain a sampling signal;
extracting second-order autocorrelation parameters of the sampling signal by using the time difference;
extracting third-order autocorrelation parameters of the sampling signal by using a frequency spectrum difference;
and comparing the second-order autocorrelation parameters and the third-order autocorrelation parameters with an aviation communication navigation waveform parameter library to determine the communication navigation waveform type of the detected signal.
3. The system of claim 1, wherein the software radio base comprises a radio frequency channel, a digital channel, and an intermediate frequency interaction network.
4. The system of claim 3, wherein the digital channels comprise a code library, a modulation library, a filter library, and a demodulation library of the aeronautical waveforms.
5. The method according to claim 3, wherein the modulating the detected signal by invoking a software radio library according to the communication navigation waveform type specifically includes:
and processing the radio frequency front end according to the communication navigation waveform type, coding, modulating, filtering and demodulating, and performing intermediate frequency interaction according to the loaded position.
6. The method according to claim 5, wherein the processing the radio frequency front end according to the communication navigation waveform type specifically includes:
and controlling a radio frequency front end switch, a transmitting frequency point, a transmitting bandwidth and a data pulse according to the communication navigation waveform type.
7. The method of claim 2, further comprising:
and monitoring the sampling signal, the second-order autocorrelation parameter and the third-order autocorrelation parameter, and displaying monitoring data.
8. The method of claim 7, further comprising:
obtaining a modified part of modulation parameters through a man-machine interaction mode;
and carrying out modulation processing on the detected signal by combining the modulation parameters of the correction part.
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| US20130181573A1 (en) * | 2012-01-16 | 2013-07-18 | Applied Sensor Research & Development Corporation | Individually identifiable surface acoustic wave sensors, tags and systems |
| JP2017026444A (en) * | 2015-07-22 | 2017-02-02 | 格一 塩見 | Reflection type radar receiver and secondary surveillance radar system |
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