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Modulation jump technique for frequency-hop communication

A technology of frequency hopping communication and technology, applied in the direction of electrical components, transmission systems, etc., can solve problems such as no meaning

Inactive Publication Date: 2005-03-16
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two are indispensable, just received but not deciphered, this kind of interception is also meaningless
Especially for frequency hopping communication, we cannot simply rely on increasing the frequency hopping rate to improve the anti-intercept ability of information transmission

Method used

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  • Modulation jump technique for frequency-hop communication
  • Modulation jump technique for frequency-hop communication
  • Modulation jump technique for frequency-hop communication

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with examples.

[0031] figure 1 It is the functional block diagram of the frequency hopping modulation communication system transmitter. The specific method is: the signal source to be sent is sent to the baseband modulation hopping module. After being processed by the baseband modulation hopping module, various baseband modulations are completed. The output signal of the baseband modulation hopping module has a variety of modulation methods. The modulation method is Jumping. After the baseband modulation hopping module completes the modulation hopping processing, the output signal is sent to the frequency mixing module, where it is mixed with the signal from the frequency synthesizer, and the mixed signal is sent to the power amplification module, and after power amplification Then it is transmitted by the transmitting antenna. The frequency of the output signal of the frequency synthesizer is con...

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Abstract

The invention is a modulation jump technique for jump frequency communication, and its characteristic: it adopts modulation jump technique in jump frequency communication and the signal in the channel is a jump-frequency jump-modulation combined signal. In the jump frequency communication, it adopts a kind of modulating mode at each jump frequency point; the modulating modes at two adjacent frequency points in a jump frequency set can be same or different, but it adopts a different modulating mode at least two or above jump frequency points; the base band modulating mode adopted by a transmitting part at each jump frequency point can jump in a pseudorandom mode or in a regular rule. It adopts base-band modulation jump technique in jump frequency communication, and can make the modulations at different carrier wave frequencies different and the characteristic of communication signal in the channel not constant any more, thus bringing about a very great difficulty in analyzing and decoding to hostile or illegal receiving part. The combination of modulation jump technique with jump frequency communication can further strengthen the anti-capture ability of information transmission in jump frequency communication system.

Description

technical field [0001] The invention relates to a modulation hopping technology for frequency hopping communication, which is characterized in that the baseband modulation hopping technology is used in the frequency hopping communication, and the signal transmitted on the channel is a composite signal of frequency hopping modulation. The method can be applied to wireless frequency hopping communication, which can significantly increase the difficulty for an enemy or an illegal receiver to decipher received information, and improve the security of information transmission and the ability to resist interception. Background technique [0002] Because of its good confidentiality and anti-interference performance, frequency hopping communication has been developed rapidly in military wireless communication and civilian wireless communication. Compared with fixed-frequency wireless communication, frequency-hopping wireless communication avoids interference, can avoid multi-path in...

Claims

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Application Information

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IPC IPC(8): H04B1/713
Inventor 高勇
Owner SICHUAN UNIV
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