Intermittent sampling and forwarding interference in multicarrier phase coding radar signals

A technology of phase coding and forwarding interference, which is applied in the field of intermittent sampling and forwarding interference to multi-carrier phase-coded radar signals, can solve the problems of prolonged delay, strong regularity and low complexity of interference signals, and achieves strong regularity and delay. The effect of time prolongation and simple interference form

Inactive Publication Date: 2019-03-08
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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AI Technical Summary

Problems solved by technology

By performing multi-carrier frequency parallel modulation on intermittent sampling signals, the problems of prolonged lag time, low complexity and strong regularity of traditional interference signals are solved
The influence of sampling duty cycle on false target amplitude under different signal forms is shown in Table 1

Method used

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  • Intermittent sampling and forwarding interference in multicarrier phase coding radar signals

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Embodiment Construction

[0009] Step 1: Signal generation

[0010] Select the phase encoding mode, time width, bandwidth, pulse repetition period, etc. to generate the corresponding multi-carrier phase encoding signal. The present invention selects P4-OFDM, PN-OFDM and Chaos-OFDM.

[0011] Step 2: Interference parameter setting

[0012] When the signal passes through the interference receiver, the target radar signal is screened out through sorting, identification, and frequency measurement, and the intermittent sampling cycle, intermittent sampling pulse width, sampling duty cycle, and interference forwarding are set according to the duration of a single pulse of the radar transmitted signal In this method, the intermittent sampling period needs to be 2 times or more than the sampling pulse width. Among them, the sampling pulse width determines the time delay of the false target lagging behind the real target, and the sampling duty cycle determines the amplitude of the false target. When the repeated...

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Abstract

The invention discloses intermittent sampling and forwarding interference in multicarrier phase coding radar signals; and the invention introduces intermittent sampling and forwarding interference toa multicarrier phase coding system radar, and is an intermittent sampling based multicarrier phase coding interference method. The method utilizes a digital radio frequency memory to perform periodicintermittent under-sampling processing on a target radar signal, and performs forwarding on a sampling signal by setting a forwarding pattern. The method specifically includes the following steps: 1)generating signals; 2) estimating interference parameters; 3) performing intermittent sampling processing on an interception signal; and 4) performing forwarding on interference according to the set forwarding pattern. The method makes up disadvantages of conventional interference of being simple in form, low in complexity and high in predictability; and controllable vivid false target interference in the amplitude, quantity and spatial distribution of the multicarrier phase coding radar can be realized by reasonably setting the interference parameters.

Description

technical field [0001] Radar electronic countermeasure field [0002] At present, forwarding and spoofing jamming of multi-carrier phase-encoded OFDM radar is mainly realized through modulation forwarding and direct copying and forwarding. The traditional interference form is simple, and the lag time of the jamming signal is prolonged, with strong regularity and high predictability. The present invention introduces the concept of intermittent sampling and forwarding interference into the multi-carrier phase coding system radar. It is a multi-carrier modulation and forwarding interference pattern based on intermittent sampling, which makes up for the shortcomings of traditional interference methods. Modulation parameters such as width and sampling duty cycle are used to control the amplitude fluctuation characteristics of false targets, the spatial distribution of false targets and the number of false targets. Background technique [0003] Traditional radar jamming is mostly...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/38
CPCG01S7/38
Inventor 李骥王桦王威
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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