A Radar Jamming Method Based on Multi-Phase Segment Modulation
A technology of radar interference and phase modulation, applied in radio wave measurement systems, instruments, etc., can solve the problems of high peak power requirements of jammers and low energy utilization of jamming signals, and solve the contradiction between jamming power utilization , the effect of improving the utilization rate
Active Publication Date: 2018-12-25
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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Problems solved by technology
On the one hand, the energy utilization rate of the interference signal brought by signal sampling is low, and the peak power of the jammer is required to be high; The predictability of the effect has certain limitations
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[0020] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0021] The present invention provides a radar jamming method of multi-phase segmental modulation. Different phase values are modulated in different time segments of the signal to obtain corresponding interference signals. Coherence of radar signals. By controlling the different combinations of the number of segments and the phase modulation value, the interference signal can be changed in many ways to obtain different interference signal outputs. There is a certain correspondence between the number of segments and the interference effect. When the signal is divided into n segments, the coverage range of the interference effect obtained is related to the length of the shortest signal segment. If the smallest segment signal accounts for 1% of the entire signal / m, the coverage range of the interference effect can be expanded to m times; when the signal is...
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The invention discloses a multi-phase sectioned modulation-based radar interference method for the problems of a part of current coherent interference technologies. Multi-phase sectioned modulation is performed on all sections of a radar signal to realize interference to target information under the condition of relatively higher interference power utilization rate to achieve a relatively better covering effect. The method comprises the following steps: temporally sectionalizing a received radar signal to obtain signals of each section, wherein the number of the sections is not smaller than 2; then performing phase modulation on the signals of each section to obtain phase-modulated sectionalized signals, wherein a modulation phase value is any value in [0,2pi], and at least two in the modulation phase values of all the sectionalized signals are different; integrating all the modulated sectionalized signals into a whole-section signal to obtain a final interference signal according to a temporal sequence, wherein the lengths of each sectionalized signal are equal or unequal. According to the method, the utilization rate of interference power is effectively increased, and the conflict between a radar interference effect and the utilization rate of the interference power is resolved.
Description
technical field [0001] The invention belongs to the technical field of radar countermeasures, and in particular relates to a radar jamming method based on multi-phase segment modulation. Background technique [0002] As an advanced detection tool, radar has the ability to obtain target information all-weather, all-weather, and long-distance. It can not only regard the observed object as a "point" target to measure its position and motion parameters, but also obtain The image of the target and the scene can obtain the fine two-dimensional structure information of the target to realize the recognition of the target. According to different radar systems, radars can be divided into four categories: the first category is conventional system radar; the second category is pulse compression radar, which improves the ability to obtain target distance information; the third category is pulse Doppler radar. Le radar, the system radar improves the ability to acquire target speed inform...
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IPC IPC(8): G01S7/38
CPCG01S7/38
Inventor 吴彦鸿
Owner PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV