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Airspace real-time adaptive anti-interference system for short-time pulse interference

A short-time pulse and self-adaptive technology, which is applied in the transmission system, radio transmission system, diversity/multi-antenna system, etc., can solve the problems of high interference power, difficulty in capturing and suppressing pulse interference in real time, and short duration, etc. Low power consumption, improve the transmission performance of anti-pulse interference, and eliminate the effect of pulse interference

Active Publication Date: 2020-05-12
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0003] The purpose of the present invention is to propose a space domain real-time adaptive anti-jamming system for short-time pulse interference, which solves the problem that it is difficult to capture and suppress real-time pulse interference with the characteristics of suddenness, short duration, and large interference power.

Method used

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  • Airspace real-time adaptive anti-interference system for short-time pulse interference
  • Airspace real-time adaptive anti-interference system for short-time pulse interference
  • Airspace real-time adaptive anti-interference system for short-time pulse interference

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Embodiment 1

[0115] In this embodiment, anti-jamming processing is performed on microwave signals received by a triangular grid hexagonal array antenna with an array element spacing of 0.6λ and D=19, such as figure 2 As shown, the received microwave signal passes through the radio frequency circuit, intermediate frequency sampling and digital down conversion circuit to complete the amplification and filtering of the radio frequency signal, down conversion, intermediate frequency filtering, intermediate frequency analog-to-digital conversion and digital down conversion filtering to obtain the baseband signal.

[0116] The central frequency of the intermediate frequency signal output by the radio frequency circuit in this embodiment is 5MHz, the sampling rate of the modulus change is 80MHz, and the intermediate frequency sampling and digital down-conversion circuit of each channel of 19 channels are as follows image 3 As shown, the digital down-conversion NCO is 5MHz; the decimation filter ...

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Abstract

The invention discloses an airspace real-time adaptive anti-interference system for short-time pulse interference. The system comprises a baseband data caching module, a digital beam forming module, ablocking interference space-time estimation module and a null / static beam forming module, and the baseband data caching module is used for blocking baseband data according to time T and caching the baseband data according to blocks; the blocking interference space-time estimation module performs pulse interference detection on the blocked baseband data block by block, and determines the interference quantity and angle of each block of baseband data; the null / static beam forming module is used for calculating a weight coefficient of a null / static beam; and the digital beam forming module performs beam forming processing according to the weight coefficient corresponding to the blocked baseband data to obtain an anti-interference digital beam. According to the method, the data is partitioned, and the interference characteristics in the data block are directly applied to the data processing of the block, so that the pulse interference is eliminated, and the suppression of short-time strong pulse interference is realized.

Description

technical field [0001] The invention belongs to the space adaptive anti-jamming technology of digital array antennas, in particular to a space real-time self-adaptive anti-jamming system for short-time pulse interference. Background technique [0002] In communication and radar systems, there are many reasons for pulse interference, including interference caused by objective natural environments such as lightning and multi-system coexistence, and active interference generated by humans. As a typical time-domain interference, pulse interference has the characteristics of suddenness, short duration, and high interference power. It will cause serious data errors in the communication system at this moment, and the radar system cannot perform effective target detection and tracking. However, the conventional adaptive beamforming algorithm is more effective in combating continuous interference in the airspace, but poor in suppressing pulse interference. Contents of the invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/719H04B7/06G01S7/36G01S7/35G01S7/292G01S7/02
CPCG01S7/023G01S7/2928G01S7/354G01S7/36H04B1/719H04B7/0617
Inventor 马晓峰王铭盛卫星张仁李韩玉兵
Owner NANJING UNIV OF SCI & TECH
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