Security communication method based on special invers transformation

A technology of secure communication and inverse transformation, which is applied in secure communication devices, digital transmission systems, electrical components, etc., can solve the problems of complex technology, increased system complexity and cost, and high construction cost, and achieve cost reduction, simple separation and restoration. , the effect of simplifying the system structure

Inactive Publication Date: 2009-07-22
泉州天地星电子有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the effects that traditional methods and systems can achieve are extremely limited for communication systems with high confidentiality requirements
Therefore, in order to obtain high confidentiality, it is often necessary to use multiple security technologies in combination, but this brings about the problem of greatly increasing the complexity and cost of the system
The CDMA technology with better confidentiality is based on spread spectrum communication, which cannot be applied in the existing communication system, and the technology is complicated and the construction cost is high.

Method used

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  • Security communication method based on special invers transformation
  • Security communication method based on special invers transformation
  • Security communication method based on special invers transformation

Examples

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Embodiment Construction

[0029] figure 1 The shown secret communication system based on special inverse transformation adopts multiple nested modulation and demodulation mode, and works in frequency band group multiplexing.

[0030] exist figure 1 In, the input signal can be an analog or digital signal, and a multi-level modulated carrier signal is applied at the sending end Multiple modulation is performed on one or more input signals, and the frequency of the modulated carrier signal of the latter stage is at least one order of magnitude higher than that of the modulated carrier signal of the previous stage. At the receiving end, the multi-stage demodulated carrier signal is used {S d (nt), 2S d (nt)…mS d (nt)} perform multi-level demodulation on one or more received signals. The modulated carrier signals of each level and the demodulated carrier signals of each level are non-orthogonal. The modulated carrier signal of each level is a special inverse transformation of the demodulated carrier s...

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Abstract

This invention applies two signal groups orthogonal but not orthogonal themselves meeting special inverse transformation, as a demodulation signal and a modulation signal, they modulate and demodulate analog or digital signals transmitted in one way or multi-way many times so as to constitute muktinest ciphering to the source signal, or code and decode multi-bit digital signals as the decoding signal of coding signal to let the decoding and judgment of signals rely on the special inverse transformation algorithm and complicated restruction to realize encryption.

Description

technical field [0001] The present invention relates to a secure communication method, which adopts two orthogonal signal families satisfying special inverse transformation as the demodulated carrier signal and the modulated carrier signal to perform multiple modulation and demodulation on one-way or multi-way transmitted analog or digital signals, Or as a decoded signal and a coded signal, the multi-bit digital signal is encoded and decoded in parallel, thereby providing a new secure communication method. Background technique [0002] The rapid development of the communication industry has brought about the problem of confidential communication. The illegal interception and theft of information often cause serious consequences, so the confidential communication has attracted more and more attention. At present, the security technologies that have been applied in communication include information encryption, channel security, scrambling, special or multiple modulation, and s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/28
Inventor 苏武浔魏腾雄
Owner 泉州天地星电子有限公司
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