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A multi-sequence frequency hopping anti-jamming communication method based on pseudo-random chirp

A technology of linear frequency modulation signal and communication method, which is applied in the direction of transmission system, electrical components, etc., can solve the problem of anti-interference performance degradation, and achieve good effect against narrow-band interference and obvious effect

Active Publication Date: 2021-07-30
ARMY ENG UNIV OF PLA
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Problems solved by technology

According to the analysis, this method has a good anti-interference effect, but it has a fatal weakness, that is, when the dual frequency is interfered, its anti-interference performance drops sharply

Method used

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  • A multi-sequence frequency hopping anti-jamming communication method based on pseudo-random chirp
  • A multi-sequence frequency hopping anti-jamming communication method based on pseudo-random chirp
  • A multi-sequence frequency hopping anti-jamming communication method based on pseudo-random chirp

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Embodiment Construction

[0045] The technical solutions of the present invention will be described in detail below in conjunction with examples and accompanying drawings.

[0046] The present invention is suitable for multi-sequence frequency hopping, but in order to facilitate analysis and description without loss of generality, a special form of multi-sequence frequency hopping, that is, dual-sequence frequency hopping, is used as an example to illustrate, and subsequent introductions are all based on dual-sequence frequency hopping ( like figure 1 shown). Those skilled in the art can replace it with other forms of multi-sequence frequency hopping on the basis of the following description.

[0047] 1. The launch part (such as figure 2 shown)

[0048] Step 1: Generate a dual-sequence frequency-hopping signal (such as image 3 shown)

[0049]The dual-sequence frequency hopping technology adopts the concept of "channel is the message". The frequency hopping frequency does not carry information, b...

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Abstract

The invention relates to a multi-sequence hopping anti-interference communication method based on pseudo-random linear frequency modulation. In the linear frequency modulation signal, the frequency modulation slope is replaced by a controllable pseudo-random number; Combining frequency technology; the carrier frequency of each hop is mixed with a pseudo-random chirp signal, and the extended bandwidth of the pseudo-random chirp signal is guaranteed to be smaller than the channel bandwidth, generating a communication anti-jamming waveform. Based on multi-sequence frequency hopping, the present invention takes further improving the anti-interference ability of multi-sequence frequency hopping communication as the research starting point, and proposes a multi-sequence frequency hopping anti-interference communication method based on pseudo-random linear frequency modulation, which can be used as an emergency communication method in practice.

Description

technical field [0001] The invention relates to an anti-jamming communication method, which is suitable for the field of wireless communication anti-jamming, in particular to a multi-sequence frequency-hopping anti-jamming communication method based on pseudo-random linear frequency modulation. Background technique [0002] In order to improve the anti-interference ability of the system, spread spectrum communication technology is widely used in various wireless communication systems. The commonly used spread spectrum communication technology mainly includes frequency hopping spread spectrum, direct spread spectrum and direct spread / frequency hopping combined technology and so on. [0003] Direct spread spectrum technology has the characteristics of strong anti-narrowband interference capability and low probability of interception. However, once the interfering party detects the working frequency range of the communicating party and implements broadband interference, the com...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/715H04B1/7156
Inventor 孙慧贤全厚德唐志强崔佩璋刘建成
Owner ARMY ENG UNIV OF PLA
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