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Multi-cycle correlative same frequency interference resisting method and device

A technology of co-channel interference and radar equipment, applied in parts of color TV, parts of TV system, TV, etc.

Inactive Publication Date: 2013-04-24
ANHUI BOWEI CHANGAN ELECTRONICS
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Problems solved by technology

[0003] The present invention is to avoid the deficiencies in the above-mentioned prior art, and provides a multi-period correlation anti-same-frequency interference method and its device for radar equipment, so as to solve the problem of navigation radars of the same type or different types of navigation radars with similar frequencies. The problem of mutual interference between radars improves the effect of anti-jamming

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  • Multi-cycle correlative same frequency interference resisting method and device
  • Multi-cycle correlative same frequency interference resisting method and device
  • Multi-cycle correlative same frequency interference resisting method and device

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Embodiment Construction

[0035] see figure 1 , the multi-period correlation anti-same-frequency interference method for radar equipment is characterized in that it comprises the following steps:

[0036] a. Bottom clamping of the input signal: first, bottom clamp the input analog video signal to stabilize the input analog video signal at a fixed baseline level;

[0037] b. Analog-to-digital conversion and intra-pulse accumulation of signals: convert the analog video signal clamped at the bottom into a digital signal, and perform intra-pulse accumulation on the converted digital signal to obtain the accumulated signal; the accumulated signal is a digital signal for Compensate for the signal loss caused by the mismatch between the bandwidth of the receiving system and the bandwidth of the signal;

[0038] c. Determination of the automatic threshold level: in the fixed time period of the reverse process, the average value of the noise of the accumulated signal is detected, and the average value of the ...

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Abstract

The invention discloses a multi-cycle correlative same frequency interference resisting method and device used for radar device. The method comprises the processes such as bottom clamping of an analogue signal, analogue-digital conversion and intra-pulse accumulation of the signal, determination of an automatic threshold level, multi-cycle correlative processing of a digital signal, skip video accumulation of a digital signal, digital-analogue conversion and amplification, and the like; and the device comprises a bottom clamping circuit, an A / D (Analog to Digital) converter, an intra-pulse accumulator, an automatic noise detector, a microprocessor, a video accumulator, a D / A (Digital to Analog) converter and a video amplifier. The method and the device are especially applicable to preventing same frequency interference between navigation radars, and have the advantages of improving the anti-interference performance of the navigation radars without limitation caused by the bandwidth of the navigation radars.

Description

technical field [0001] The invention relates to an anti-same-frequency interference method and its device, in particular to a multi-period correlation anti-same-frequency interference method and its device for preventing the same-frequency interference between navigation radars. Background technique [0002] With the development of electronic technology, the distribution density of electronic devices is getting higher and higher, and the problem of mutual interference between electronic devices is becoming more and more serious. Especially for electronic devices with the same or close frequency, the same-frequency interference generated when the distance is relatively close is quite serious. For example, when the shipborne navigation radars of the formation are turned on at the same time, co-frequency interference (such as Figure 4 As shown), a large number of false targets appear on the display, which greatly affects the detection and tracking of the target by the radar. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/213G01S7/38
Inventor 杨守峰舒正亮刘中坤王峰文晓明陶烨
Owner ANHUI BOWEI CHANGAN ELECTRONICS
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