Method for automatic monitoring of radio communication systems

FIELD: radio engineering.

SUBSTANCE: method includes quality estimation of selected messages, while signals, having deviations from determined structure at different levels of their generation are recorded in operative memory buffer device, formatted and through controller are recorded on detachable data carrier on hard drives for later analysis, and modulated signals with deviation of system characteristics of output of second direction of branch for input to operative memory device of buffer are previously subjected to amplification, filtering and analog-digital processing.

EFFECT: higher efficiency, broader functional capabilities.

2 dwg

 

The invention relates to the field of radio and can be used to implement the systems, monitors communication systems with different types of modulation of the radio signals transmitted by satellite, microwave and other wireless communication lines.

Operational evaluation of the electromagnetic environment and analysis of the status of the communication channels in real time in specific conditions of acceptance are possible when an effective system of radio monitoring, which should ensure the mobility of monitoring tools and a complete set of tools for processing and analysis of signals.

The main objective of monitoring is the task of controlling communication systems aimed at:

- identification of communication channels in accordance with the procedure of their organizations;

- analysis of the effectiveness of the use of communication channels (radio spectrum);

- identification of disturbing factors for communication systems;

- detection of violations of the discipline of communication and unauthorized access to the system;

- the measurement of radiation and the detection of their deviations from the reference values;

- assessment of the quality of the transmitted messages.

To solve these problems, there are special technical means, including:

- antenna-feeder devices;

- receptors;

analyzers and meters technical the definition of parameters;

- demodulator;

- decoders;

- demultiplexes;

device for the processing and recording of the received information.

A wide range solve such technical means of goals is impossible without the use of the developed item of hardware and software designed to enhance the efficiency of the control service.

The complex monitoring is required to ensure the ability to work with high-speed data streams. The task of the hardware and software of this system is to provide access to the signal at any level of the hierarchy seal against the background of constantly changing electromagnetic environment, the possibility of their analysis and processing.

Under the optimal method of monitoring an unknown signal is received almost no significant restrictions on the time of occurrence, duration, carrier frequency, the width of the spectrum and modulation methods [1, 2]. At the same time the most advanced and modern methods of evaluation of the electromagnetic environment does not allow you to take full account of the diversity of the real situation.

It should be noted that known to the applicant monitoring radio signals optimized for specific tasks.

Thus, in [3] described a method that allows to determine and record the presence of the received signal having in advance zvesdnuy structure.

In [4] described a method that allows to control the communication channels and determine which channel passes, and which takes in the moment, with the resulting data recorded in the memory and to estimate the parameters of signals received and transmitted outside the working range of frequencies.

In [5] patented a method that allows to evaluate the quality of the signal circulating in the local wireless network. In accordance with this method, user terminal is informed about the quality of communication with the base station acoustic alarm, in response to a certain signal quality from the user terminal generates tone signals with different frequencies and amplitudes.

In [6] noted that for monitoring signal in a wide frequency range of satellite communication networks using complex observation stations.

In [7] describes a method of monitoring radio signals, which estimate the probability of detection and speed detection of unknown signals in the n-channel equipment.

In this way provide analysis of the received signals based on computing the fast Fourier transform (FFT) using the control computer.

According to this method, the signal:

- take the antenna system;

- filtered using a broadband perestroika the second receiver;

- converted into digital form using a multi-channel analog-to-digital Converter (ADC);

- analyzed using the FFT solvers;

- indicate the received signal on the monitor of a personal computer (PC);

- perform automated analysis of signals using the PC and functional software (FPO).

In [8] describes the method adopted for the prototype, reception, demodulation and processing of the deterministic phase-shift keyed (FM) signals for the case of short-term decrease of the signal-to-noise ratio below a threshold level.

According to this method, perform the following sequence of operations:

- the signal is received (converted into intermediate frequency (if);

signal demodulator (converted into a digital stream accompanied clock frequency);

- from a digital stream selectrow the synchronization signals in the frequency interval of the digital stream signal personnel, supernatrual and sverchkova synchronization);

- synthesize a model of the processed signal;

- put the model signal in memory;

- the synchronization signal synchronous with the digital stream read model signal from the random access memory (RAM);

- generate the clock signal components of the digital stream;

- the selected clock is ignorami selectrow information part components of the digital stream;

- continuously monitor the availability of personnel, supernatrual and sverchkova synchronization;

- in case of violation of sync (because of the increasing number of errors in a digital signal) the signal after demodulation is converted into a parallel code and write it to a hard magnetic disk of a PC;

- known algorithms using a personal computer to produce detailed processing of the recorded digital stream in petrolina time scale and produce information.

The signal processing in the method prototype is closest to solve the problem, but at the same time does not allow to assess the electromagnetic environment in full for those signals that are not exposed in this receiving system processing for one reason or another, emitting the message.

The aim of the invention is to increase the efficiency of the prototype method for solving problems of monitoring of radio signals transmitted through the channels of radio, satellite and other wireless communication lines.

To achieve this goal we propose a method for automated monitoring of communications systems, namely, that the signal is received by a broadband antenna system, strengthen and transform in the range receivers, branch into two directions, one of which is the signal in the sequence reverse the th its formation on the transmission side, processed, with each stage according to the results of the analysis with the help of hardware-software means the signal is filtered, demodulated, decode, descrambler, resultnat, demultiplexers multicast flow, create information channels and produce messages.

According to the invention the selected digital message appreciate, and digital signals having deviations from the deterministic patterns at different stages of the analysis and processing, are entered in the random access memory buffer, format and via the controller writes to a removable drive on hard magnetic disks for further analysis, while the analog signal with a deviation of system characteristics on the output of the second direction branching to enter in the random access memory buffer and then writing to a removable drive on hard magnetic disks previously subjected to amplification, filtering, conversion into a signal of intermediate frequency, quantization and converting each sample into a digital code.

A similar solution for quick adaptation to real conditions, not described in literature, so the method meets the criteria of novelty and inventive step.

Figure 1 shows the structural diagram of the device for the proposed method, the figure 2 - one of its variants build.

In accordance with the proposed method over the signal perform the following sequence of operations:

- take wideband antenna system;

- enhance and transform in the range of receivers;

- branch in two directions;

according to one of the branching of the signal in order to reverse its formation on the transmission side is subjected to analysis and processing;

- by results of the analysis with the help of hardware-software means the signal is filtered, demodulated, decode, descrambler, resultnat, demultiplexers multicast flow;

- create information channels and produce messages;

- selected digital message appreciate quality;

- digital signals having deviations from the deterministic patterns at different stages of the analysis and processing, are entered in the random access memory buffer, format and via the controller writes to a removable drive on hard magnetic disks for further analysis;

analog signal with a deviation of system characteristics on the output of the second direction branching to enter in the random access memory buffer and then writing to a removable drive on hard magnetic disks previously subjected to amplification, is istratii and converted into a signal of intermediate frequency, quantization and converting each sample into a digital code.

The structure of the device that implements the proposed method (figure 1), are connected in series antenna system (as) 1, full-range microwave tract 2, the signal splitter 3, the receiving-demodulate device 4, razoblachitel group flow 5, 6 computers, ensuring the allocation of channels and messages, device quality assessment received messages 7. The second inputs of the antenna system 1 and the full spectrum of the microwave path 2 is connected to the outputs of the system guidance and control 8. The second output of the coupler 3 is connected to the input of a broadband radio receiver (SCU) 9. The output SCU 9 and the second output of razuplotneniya 5 are connected with the inputs of the analog-to-digital buffer (ACB) 10. Management of functional units (FU) 4, 5, 6, 7, 8, 9, 10 undertaken by the VME bus 11 to the controller 12. The exchange of information between FU 4, 5, 6, 7, and 10 is performed by the VME bus 13. The controller 12 is connected by a local area network (LAN) with the PC 14. The interface module 15 is connected to the controller 12 through the VME bus 13 and drive hard disk drive HDD 16. The controller controls the write, read, storage and transportation information 17 is connected removable drives hard disk drives VME 18, and through the VME bus 19 is connected to ACB 10.

The input device is input AC1 and outputs - inputs-you are the odes removable drives hard disk drives 18.

The device operates as follows. With the help of the software installed in the controller 12 and the memory 16, the guidance system and the control 8 is pointing AC1 on the signal source. Pointing to the source of the signal is performed in the automatic mode, or offline by the operator. Input signal through the antenna system 1 and wideband microwave tract 2 is fed to the input of the signal splitter 3. In the tract, consisting of a receiving-demodulateur device 4, razuplotneniya group flow 5, 6 computers, using hardware and software is receiving, analyzing and processing the signal emitting messages, which is evaluated in the device 7.

From the second output of the signal splitter 3 signals, which have deviations on the system characteristics (the definition of such a signal is a software analysis tools), through a broadband RPU 9 are received in analog-to-digital buffer 10 and are converted into digital form. On the same buffer receives digital signals from the output of razuplotneniya 5 mode of transit or after processing. In analog-to-digital buffer 10 high speed digital signals are recorded in the RAM buffer, attached to a clock frequency, formatted and with the help of the controller 17, is recorded in the removable drives jesd the x magnetic disks 18. Low-speed signals from the special processor 6 via the controller 12 is recorded on the HDD 16.

Analysis and processing of signals recorded in the removable drives 18 or HDD 16 is in petrolina time using software analysis tools.

The proposed solution provides the flexibility to use funds processing and analysis, adaptability to changing the nomenclature of the signals in the electronic environment, mobility and high efficiency when monitoring communications systems.

At the time of filing the layout was created device automated monitoring of radio communication systems, one embodiment of which is presented in figure 2.

The use of the proposed method obtained the following technical and economic effect:

- provides a record of system and structural parameters of unknown signals at all levels of the formation with the use of hardware and software;

- allows subsequent analysis of program means recorded information;

removable drives allow for the possibility of the accumulation of large (up to 4 TB) data fast enough to record high-speed signals at all stages of processing.

Literature

1. "Special equipment" No. 4, 2000

2. "Special equipment" No. 5, 2000

3. "Comunication Signal detection and acquisition", Pat. U.S. No. 5282227, MKI5N 03 D 3/24.

4. "Test devise for analyzing communication channels in a trunked radio system" U.S. Pat. U.S. No. 5361402, MKI5N 04 17/06.

5. Monitoring signal quality in a wireless local loop communication system", application No. 2328842, UK, IPC6H 04 Q 7/34.

6. System monitoring networks satellite radio. Mitsubishi Election. Adv. - 1999 r. - 86, June.

7. Avicula and other Automated radio monitoring". Radiotekhnika, No. 11, 1998

8. Agarkov V.Y. and other "Method of reception, demodulation and processing of signals from satellite and radio-relay communication lines", application No. 2001130310, IPC7H 04 J 3/06, H 04 L 5/22 (positive decision).

The way automated monitoring of communications systems, namely, that the signal is received by a broadband antenna system, strengthen and transform in the range receivers, branch into two directions, one of which is the signal in the reverse order of its formation on the transmission side, is subjected to analysis and processing, with each stage according to the results of the analysis with the help of hardware-software means the signal is filtered, demodulated, decode, descrambler, resultnat, demultiplexers multicast flow, create information channels and produce messages, wherein the selected digital message appreciate, and digital signals having rejected the I from deterministic patterns at different stages of the analysis and processing, entered in the random access memory buffer, format and via the controller writes to a removable drive on hard magnetic disks for further analysis, while the analog signal with a deviation of system characteristics on the output of the second direction branching to enter in the random access memory buffer and then writing to a removable drive on hard magnetic disks previously subjected to amplification, filtering, conversion into a signal of intermediate frequency, quantization and converting each sample into a digital code.



 

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