Method for improving low interception performance of radar signal

A radar signal, low interception technology, used in radio wave measurement systems, instruments, etc., can solve the problems of difficult BT product, low interception performance, limitations, etc., achieve excellent speed resolution characteristics, improve distance resolution or speed resolution, The effect of increasing the degree of pseudo-randomness

Inactive Publication Date: 2014-03-19
DALIAN UNIVERSITY
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AI Technical Summary

Problems solved by technology

Under the current technical conditions, it is difficult to achieve a large BT product for a single modulation signal, and the low interception performance is limited

Method used

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Embodiment Construction

[0008] A method for improving the low-interception performance of radar signals, firstly combining FSK signals and PSK signals, then modulating the combined FSK signals and PSK signals, and finally using the modulated combined signals as radar signals.

[0009] In order to improve the low-intercept performance, the method of combining signals and compound modulation is adopted. Among them, the signal combination method can obtain a composite signal with a large BT product, and realize the direct complementation of a single signal to improve the distance resolution or speed resolution; in addition, the composite modulation can also improve the pseudo-random degree of the signal, thereby reducing the interception of the receiver for detection , Difficulty in identifying and tracking. The FSK / PSK combined signal has a larger time-width-bandwidth product than any single signal, and has better velocity resolution characteristics than a single signal, and is a better signal with low...

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Abstract

The invention discloses a method for improving low interception performance of a radar signal and relates to the technical field of radio transmission methods. Firstly, an FSK signal and a PSK signal are combined and then the combined PSK signal and PSK signal are conditioned and at last, the conditioned combined signal is used as the radar signal. The method employs methods of signal combination and composite modulation, wherein the signal combination method is capable of obtaining a composite signal of large BT product and realizing direct complementarity of a single signal and improving the range resolution or speed resolution; moreover, the composite modulation is also capable of improving the pseudorandom degree of the signal so as to reduce the difficulties in detection, identification and track of an intercept receiver. The FSK / PSK composite signal has a time bandwidth product larger than that of any single signal and a better speed resolution characteristic than that of any single signal so that the composite signal is a great low-intercept-performance signal.

Description

technical field [0001] The invention relates to the technical field of radio transmission methods, in particular to a method for improving the low interception performance of radar signals. Background technique [0002] Since the advent of radar, electronic countermeasure technology has emerged as the times require. Low probability of intercept (LPI) technology is a comprehensive embodiment of radar anti-jamming, anti-reconnaissance, and anti-destruction technologies. In the modern electronic warfare environment, low intercept probability radar is an important way to improve the radar's working capability and survivability, and one of the important technologies to achieve low radar interception is to use large time-width-bandwidth product (BT product) complex signals. Under the existing technical conditions, it is difficult to achieve a large BT product for a single modulation signal, and the low interception performance is limited. [0003] FSK signal, also known as digit...

Claims

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Application Information

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IPC IPC(8): G01S7/285
CPCG01S7/03
Inventor 汪祖民孟书杰
Owner DALIAN UNIVERSITY
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