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Method of increasing secret keying volume of frequency hopping device and shortening setup time of frequency hopping

A technology for establishing time and key quantity, applied in digital transmission systems, electrical components, transmission systems, etc., can solve the problem of low absolute key quantity, and achieve the goal of increasing phase identification frequency, confidentiality and frequency hopping rate Effect

Inactive Publication Date: 2005-03-30
SOUTHEAST UNIV
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Problems solved by technology

[0007] Technical solution: the present invention designs a new frequency hopping method, adding an optional carrier frequency table and a currently selected carrier frequency table in the frequency hopping equipment, and adopts a non-equal interval frequency hopping method to increase in a dynamic and partial manner The optional frequency hopping points can fundamentally solve the problem that the absolute key amount is too low when the communication frequency bandwidth is limited

Method used

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  • Method of increasing secret keying volume of frequency hopping device and shortening setup time of frequency hopping
  • Method of increasing secret keying volume of frequency hopping device and shortening setup time of frequency hopping
  • Method of increasing secret keying volume of frequency hopping device and shortening setup time of frequency hopping

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Embodiment Construction

[0050] An optional carrier frequency table and a currently selected carrier frequency table are added to the traditional equipment, and the processor selects the appropriate carrier frequency value according to the non-equal interval algorithm for the frequency synthesizer to generate the frequency signal required by the system.

[0051] Corresponding to the frame of the frequency hopping method for increasing the absolute key amount of the frequency hopping system and shortening the establishment time of the frequency hopping figure 2 The specific implementation of Figure 7 shown. The embedded microprocessor adopts Winbond W90210; the frequency hopping pattern generator is realized by AD9854 chip and TMS320VC54022; the phase-locked loop frequency synthesizer is composed of core chip Q3236, low-pass filter OP37 and so on.

[0052] The emphasis of the frequency hopping method of the present invention is to improve the absolute key amount of the frequency hopping system and s...

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Abstract

The method includes steps: (a) based on needs of device, determining lower frequency limit of phase discrimination; (b) embedded type microprocessor selects n pieces of phase discrimination frequencies at random, and the said microprocessor controls hopping pattern generator to generate hopping pattern at random; (c) equal interval hopping frequencies permutation table is designed for each phase discrimination; all basic frequencies table selectable is formed; (d) picking up a group of frequencies and comparing them with lower frequency limit so as to generate current selecting carrier frequency table; (e) pseudo-random hopping pattern generator and current selecting carrier frequency table determines hopping frequencies sequence table, microprocessor selects control parameters of frequency synthesizer; (f) controlling divide down ratio N and reference proportion by subtraction Ro; (g) signal of pseudo-random non equal interval hopping pattern is output from frequency synthesizer.

Description

technical field [0001] The present invention is a new method for realizing frequency hopping at non-equal intervals on communication equipment, which can improve the confidentiality of frequency hopping equipment, shorten the establishment time of frequency hopping, thereby increasing the frequency hopping rate or information transmission rate, and belongs to wireless communication technical field. Background technique [0002] Frequency hopping spread spectrum communication has the characteristics of confidentiality, good anti-interception performance, strong anti-interference ability, high spectrum utilization rate and relatively simple equipment, etc., and it has shown great advantages in both military and commercial fields. With the opening of ISM (industrial, scientific, medical) frequency bands in various countries, frequency hopping technology has been used more and more, and it is used as the core technology in Bluetooth, IEEE802.11, IEEE8...

Claims

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Application Information

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IPC IPC(8): H04B1/713H04L9/20
Inventor 沈连丰刘彤宋铁成叶芝慧沈斐夏玮玮
Owner SOUTHEAST UNIV
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