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Frequency hopping broadband multi-network signal detecting and receiving method and system

A technology with signals and signals, which is applied in the field of frequency hopping broadband multi-network signal detection and reception, can solve the problems of poor multi-network signal detection and reception capabilities, complex processing procedures of frequency hopping signal detection methods, and difficulties in engineering implementation, to achieve detection The effect is good, the effect is obvious, and the effect is simple

Active Publication Date: 2021-10-15
SICHUAN JIUZHOU ELECTRIC GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method and system for detecting and receiving frequency-hopping broadband multi-network signals. By performing multi-channel processing on received signals, energy is accumulated in time and on each receiving channel, and the time point and corresponding time point where the energy meets the requirements are found out. Frequency point, to solve the problems of complex processing process, difficult engineering implementation and poor ability to detect and receive multi-network signals in the traditional frequency hopping signal detection method

Method used

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  • Frequency hopping broadband multi-network signal detecting and receiving method and system
  • Frequency hopping broadband multi-network signal detecting and receiving method and system
  • Frequency hopping broadband multi-network signal detecting and receiving method and system

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Embodiment 1

[0068] like figure 1 As shown, a frequency hopping broadband multi-network signal detection method, comprising steps:

[0069] S1. Down-convert the received signal of each channel to the base frequency band or the intermediate frequency band, and then perform AD sampling on each base frequency band or intermediate frequency band signal to obtain the sampling signal;

[0070] S2. Perform multi-channel processing on the sampling signals of each channel to obtain multiple narrowband channels;

[0071] S3. Obtain signal elements of each narrowband channel and perform signal energy accumulation;

[0072] S4. Condensing the accumulated signal energy in the time dimension to obtain the cohesion point of the narrowband channel, performing joint processing on the cohesion point of the narrowband channel and detecting the target time slot signal;

[0073] S5. Perform spatial frequency estimation based on the measured target time slot signal to obtain a corresponding spatial orientatio...

Embodiment 2

[0110] like image 3 As shown, based on a frequency-hopping broadband multi-network signal detection method in the previous embodiment, this embodiment provides a tactical data link signal detection system based on JTIDS / Link16, which receives the Link16 signal through the antenna, and passes through the frequency-hopping broadband multi-network signal detection system. The target time slot signal and its corresponding spatial orientation are obtained through the processing of the network signal detection and receiving system, and displayed on the display terminal.

[0111] The frequency-hopping broadband multi-network signal detection system includes: a sampling processing module, a multi-channel processing module, an energy accumulation module, a detection module and a spatial orientation acquisition module;

[0112]The sampling processing module down-converts the 790MHz signal received by each channel to the baseband 360MHz, and then performs AD sampling on each baseband si...

Embodiment 3

[0118] In the simulation of this embodiment, the Link16 signal is taken as an example, and it is processed under different signal-to-noise ratios (SNR) according to the method described in Embodiment 11, and its detection performance is analyzed to describe the situation where the signal-to-noise ratio is between -25dB and -21dB Next, as the signal-to-noise ratio (SNR) increases, the detection probability and false alarm probability change. The result is as Figure 4 and Figure 5 shown;

[0119] Depend on Figure 4 It can be seen that the detection probability increases monotonously with the increase of SNR, and when the SNR increases from -25dB to -21dB, the detection probability decreases from about 0.86 to about 0.1.

[0120] Depend on Figure 5 It can be seen that the detection probability increases monotonously with the increase of SNR, and when the SNR increases from -25dB to -21dB, the detection probability decreases from about 0.86 to about 0.1.

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Abstract

The invention discloses a frequency hopping broadband multi-network signal detection and reception method and system, and the method comprises the steps: carrying out the down-conversion of a received signal of each channel to a fundamental frequency band or a middle frequency band, and carrying out the AD sampling of each fundamental frequency band or middle frequency band signal, and obtaining a sampling signal; performing multi-channelization processing on the sampling signal of each channel to obtain a plurality of narrowband channels; acquiring signal elements of each narrowband channel and performing signal energy accumulation; performing time dimension condensation on the signal after signal energy accumulation to obtain a condensation point of a narrowband channel, performing joint processing on the condensation point of the narrowband channel, and detecting a target time slot signal; and performing spatial frequency estimation based on the measured target time slot signal to obtain a corresponding spatial orientation. The method is good in robustness, good in frequency hopping signal detection and receiving effect under the complex conditions of complex backgrounds, noise interference and the like, and good in target detection and receiving capacity for single-network and multi-network broadband signals.

Description

technical field [0001] The invention relates to the technical field of frequency hopping communication, in particular to a method and system for detecting and receiving frequency hopping broadband multi-network signals. Background technique [0002] Frequency hopping communication has the advantages of strong anti-interference ability, low probability of interception, strong anti-fading ability and multi-access networking ability. Based on the frequency hopping system, the data link will play an important role in the future information warfare. As a non-cooperative third party, it is fast and effective It is difficult to detect the frequency hopping signal from the complex electromagnetic environment and estimate its parameters accurately. It has very important theoretical and practical significance to carry out the research on data detection and processing based on the frequency hopping system. [0003] At present, there are traditional feature-based detection and collecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/318H04B17/336H04B1/7156
CPCH04B17/318H04B17/336H04B1/7156H04B2001/71563
Inventor 杨亚程旗陈俊良黎亮温奎
Owner SICHUAN JIUZHOU ELECTRIC GROUP
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