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A communication anti-tracking interference implementation method and system based on baseband signal processing

A baseband signal processing and tracking interference technology, which is applied in the field of anti-tracking interference, can solve the problems such as the inability to effectively solve anti-tracking interference, and achieve the effects of real-time tracking interference cancellation, fast calculation speed, and high cancellation efficiency

Active Publication Date: 2020-07-14
ARMY ENG UNIV OF PLA
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  • Claims
  • Application Information

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Problems solved by technology

At present, there are various ways of anti-interference technology, whether it is spread spectrum spread spectrum, frequency hopping and code hopping technology, or networking and radio frequency port cancellation technology, none of them can effectively solve the problem of anti-tracking interference

Method used

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  • A communication anti-tracking interference implementation method and system based on baseband signal processing
  • A communication anti-tracking interference implementation method and system based on baseband signal processing
  • A communication anti-tracking interference implementation method and system based on baseband signal processing

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Embodiment 1

[0050] Such as figure 1As shown, this embodiment provides a communication anti-tracking interference implementation method based on baseband signal processing. The processed signal form is a baseband signal. The communication anti-tracking interference implementation method includes the following steps in order:

[0051] Step 101: Determine the realization conditions of adaptive cancellation; specifically include:

[0052] Each frequency hopping frequency point performs adaptive cancellation processing twice, and needs to be completed within one frequency hopping period. The particularity of the implementation of tracking interference determines that there is an interference delay relative to the starting point of frequency hopping, and the interference delay satisfies the condition: 0≤τd ,T d Indicates the frequency hopping period. Therefore, adaptive cancellation must be implemented within each frequency hopping period.

[0053] The interference delay τ is calculated as f...

Embodiment 2

[0080] Such as Figure 5 As shown, this embodiment provides a communication anti-tracking interference implementation system based on baseband signal processing, including:

[0081] The realization condition determining module 201 is configured to determine the realization condition of adaptive cancellation. The realization condition of the adaptive cancellation is that each frequency hopping frequency point completes two adaptive cancellation processes within one frequency hopping period; wherein, the frequency hopping period is 0≤τd ; T d Indicates the frequency hopping period; τ indicates the interference delay, d 1 Indicates the distance between the jammer and the transmitter, d 2 Indicates the distance between the jammer and the receiver, L indicates the distance between the receiver and the transmitter, c indicates the speed of light, T r Indicates the processing time required by the jammer.

[0082] The reference input signal determination module 202 is configured...

Embodiment 3

[0088] In hardware, this embodiment adopts such as Image 6 The "A / D+FPGA+D / A" framework shown. Among them, the A / D module is connected to the baseband of the radio station, uses ADC (Analog to Digital Converter, analog-to-digital converter) to digitize the received analog signal, and then sends the digital signal to FPGA (field programmable gate array, field programmable gate Array) platform, the signal is subjected to two-stage adaptive cancellation filtering through a programmable filter, and then the processed signal is converted into an analog signal through a DAC (Digital to Analog Converter) and then output to the baseband. By adding A / D module and D / A module, a high-speed baseband digital signal processing platform from front-end data reception to back-end analog transmission is constructed.

[0089] Its signal processing flow is as follows Image 6 shown. Firstly, the realization conditions of adaptive cancellation are determined, and then the mixed signal sampled ...

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Abstract

The invention discloses a communication anti-tracking interference realization method and system based on baseband signal processing, and relates to the technical field of anti-tracking interference.The method comprises the steps: determining a self-adaptive cancellation realization condition; obtaining a mixed signal sampled from the baseband, and intercepting a part of length of frequency hopping signals in the mixed signal as a reference input signal of the first-stage adaptive canceller; inputting a reference input signal into a reference input end of a first-stage adaptive canceller under the implementation condition of adaptive cancellation, inputting a mixed signal into a basic input end of the first-stage adaptive canceller, and filtering the mixed signal to obtain a tracking interference signal; and then inputting the tracking interference signal to a reference input end of a secondary adaptive canceller, inputting the mixed signal to a basic input end of the secondary adaptive canceller, and carrying out filtering processing on the mixed signal to obtain an original frequency hopping signal. By applying the method or the system provided by the invention, the inhibition of tracking interference can be effectively realized.

Description

technical field [0001] The present invention relates to the technical field of anti-tracking interference, in particular to a communication anti-tracking interference implementation method and system based on baseband signal processing. Background technique [0002] Tracking jamming is one of the important jamming styles in modern combat, and it is also the focus and difficulty in communication anti-jamming technology. At present, there are various ways of anti-jamming technology. Whether it is spread spectrum spread spectrum, frequency hopping and code hopping technology, or networking and radio frequency port cancellation technology, none of them can effectively solve the problem of anti-tracking interference. Contents of the invention [0003] The object of the present invention is to provide a communication anti-tracking interference implementation method and system based on baseband signal processing, which effectively suppresses tracking interference. [0004] To ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04B1/715
CPCH04B1/715H04B2001/7152H04L25/0328
Inventor 谭志良宋培姣范新峰毕军建谢鹏浩马立云王玉明孟兆祥
Owner ARMY ENG UNIV OF PLA
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