CN108234062A - A kind of safe transmission method based on signal characteristic complication of eating dishes without rice or wine - Google Patents
A kind of safe transmission method based on signal characteristic complication of eating dishes without rice or wine Download PDFInfo
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- CN108234062A CN108234062A CN201711372207.1A CN201711372207A CN108234062A CN 108234062 A CN108234062 A CN 108234062A CN 201711372207 A CN201711372207 A CN 201711372207A CN 108234062 A CN108234062 A CN 108234062A
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- signal
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- wine
- upset
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/006—Secret communication by varying or inverting the phase, at periodic or random intervals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
Abstract
The invention discloses a kind of safe transmission methods based on signal characteristic complication of eating dishes without rice or wine, including transmitting terminal eat dishes without rice or wine signal characteristic upset and receiving terminal eat dishes without rice or wine signal characteristic descrambling, the transmitting terminal is eated dishes without rice or wine, and first with random sequence, to the progress phase upset of modulated signal, then using random sequence, to the signal after phase upset, into line amplitude, dynamically adjustment obtains amplitude jammer signal for signal characteristic upset；Receiving terminal signal characteristic descrambling of eating dishes without rice or wine restores into line amplitude to obtain amplitude descramble signal first with the random sequence identical with transmitting terminal to the signal after completing channel equalization, and phase is finally carried out to amplitude descramble signal and descrambles to obtain the signal characteristic before phase is upset.The method of the present invention can efficiently be hidden the signal characteristic of wireless transmitting system, mobile communication system safety promoted from physical layer level in the case where not extending signal bandwidth and communication system performance not being caused to be lost.
Description
Technical field
The present invention relates to a kind of safe transmission methods based on signal characteristic complication of eating dishes without rice or wine.
Background technology
Wireless signal is propagated in open environment in existing wireless communication system, and radio signal is not encrypted
Protection be easy to cause sensitive cleartext information leakage.2G/3G/4G wireless communication systems depend on safely long-term root key K, not
It can guarantee forward secrecy, once revealing, all encryption information sent before can be obtained, and with quantum root key easily
The superpower computing capability such as computer is emerged in large numbers, and the safety of traditional secrete key storage and distribution will face larger hidden danger.Wireless
Today that communication security is increasingly taken seriously, each layer in network protocol stack all add in security mechanism have become one kind must
It will.Safety of physical layer solves the information security issue in communication process by physical layer, and information is handled in physical layer,
It can fundamentally ensure the safety of information.Eat dishes without rice or wine signal characteristic complication processing be physical layer by using it is low detection,
The technical measures such as low intercepting and capturing, anti-interference reduce feature of the signal in space, time or a certain fixed frequency spectrum to reduce signal quilt
The probability for detecting and being trapped reaches the data transmission of " signal difficulty is intercepted and captured, intercepting and capturing are difficult to resolve tune, difficult decoding after demodulation " safety.
What a kind of secure transmission system based on signal characteristic complication of eating dishes without rice or wine used is exactly a kind of physical layer means, can be
Simultaneously to radio signal characteristics into line disturbance in physical layer signal processing procedure, realize that radio signal characteristics parameter is hidden, improve
The anti-eavesdropping ability of anti-interception of radio open signal.Existing signal characteristic complicates processing method and is based primarily upon ofdm signal body
System, common modulation system, which is hidden, includes two major class of frequency domain scrambling and time domain scrambling：
Frequency domain mainly has phase place, Different Modulations mixing and the methods of based on man made noise.Wherein phase place
Standard constellation point can be hidden for constellation annulus, it is limited that modulation system hides ability；Different Modulations mixing mode be
Communication system provides the method redirected between several different modulating constellation patterns, but since sample size is limited, eavesdrops Fang Jing
Statistics still can obtain modulation system, and demodulation performance is variant between various constellations pattern, influences system performance when long；Base
In the constellation hidden method of man made noise, the effective load power for sending signal is reduced, while by the shadow of noise removal situation
It is ineffective to ring practical communication.
Time domain approach mainly has the sides such as time-domain signal is multiplied by amplitude factor and phase factor, time-domain signal sampling point sequence is upset
Method.These two kinds of methods can make planisphere cloud cluster, realize that constellation is upset and hide, but can make before and after time-domain signal sampling point it
Between phase and amplitude be mutated, so as to cause signal spectrum extend, make signal bandwidth exceed equipment sender bandwidth requirement.To meet
Communication equipment bandwidth requirement, signal after upset, which is filtered, can cause communication performance drastically to deteriorate.
Signal characteristic complicates processing method in traditional serial system and OFDM frequency domain scrambling methods are essentially identical, still
Same problem can be faced.
Invention content
In order to overcome the disadvantages mentioned above of the prior art, the present invention provides a kind of peaces based on signal characteristic complication of eating dishes without rice or wine
Full transmission method, can solve physical layer signal process flow in existing wireless transmitting system it is single curing, it is dangerous the problems such as, and
Improve it is existing eat dishes without rice or wine signal characteristic complicate processing method existing for modulation system hide performance it is not high, influence communication performance index
With cannot be practical the problems such as.
The technical solution adopted by the present invention to solve the technical problems is：A kind of peace based on signal characteristic complication of eating dishes without rice or wine
Full transmission method is upset and receiving terminal is eated dishes without rice or wine signal characteristic descrambling including transmitting terminal signal characteristic of eating dishes without rice or wine, and the transmitting terminal eats dishes without rice or wine
Signal characteristic is upset carries out phase upset, then phase is disturbed using random sequence first with random sequence to modulated signal
Signal after unrest obtains amplitude jammer signal into line amplitude dynamic adjustment；The receiving terminal eat dishes without rice or wine signal characteristic descrambling first with
The random sequence identical with transmitting terminal restores the signal after completing channel equalization into line amplitude to obtain amplitude descramble signal, finally
Phase is carried out to amplitude descramble signal to descramble to obtain the signal characteristic before phase is upset.
Compared with prior art, the positive effect of the present invention is：The method of the present invention can not extend signal bandwidth and not draw
In the case of playing communication system performance loss, the signal characteristic of wireless transmitting system is efficiently hidden, from physical layer level
Promote mobile communication system safety.The present invention can solve the problems, such as that physical layer wireless signal is unprotected, and future can be used for 5G
Etc. mobile communication system, the safeguard protection of physical layer is provided for high security level user.
Description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is the secure transmission system fundamental diagram based on signal characteristic complication of eating dishes without rice or wine；
Fig. 2 for transmitting terminal eat dishes without rice or wine signal characteristic upset schematic diagram.
Phase upsets schematic diagram during Fig. 3 is upset for signal characteristic of eating dishes without rice or wine
Fig. 4 for receiving terminal eat dishes without rice or wine signal characteristic descramble schematic diagram.
Specific embodiment
One of key technology of the present invention is the secure transmission system design based on signal characteristic complication of eating dishes without rice or wine, in tradition
On the basis of Transmission system, introduce and signal characteristic complication processing of eating dishes without rice or wine is controlled by the random sequence that random sequence generator generates
Safety function module form secure transmission system, realize and carry out that feature is hidden and recovery processing, realization are eated dishes without rice or wine signal to signal
Protection promotes safety of physical layer transmittability.
The present invention's is key technology second is that sending and receiving end random sequence synchronization process, thought are by TOD or random number work
Random sequence generator is inputted for synchronous seed, the identical random sequence needed for sending and receiving end is generated, can effectively solve stochastic ordering
The problem of row fixed single is constant achieves one time one change.
The three of the key technology of the present invention are a kind of signal characteristic complication processing of eating dishes without rice or wine suitable for multi-signal system
Method, thought are that modulated signal is hidden design to order of modulation, constellation pattern, makes illegal side into line disturbance processing
The modulation system that None- identified uses.
Particular content is as follows：
First, the secure transmission system based on signal characteristic complication of eating dishes without rice or wine
The present invention is to encrypt thought by conventional cipher, and on the basis of conventional transmission systems, sending and receiving end is introduced by random
The safety function module that the random sequence control signal characteristic of sequence generator generation complicates processing forms secure transmission system,
It realizes and the hiding and recovery of signal characteristic is handled, the anti-of lifting system intercepts ability of anti-interception, and System Working Principle figure is such as
Shown in Fig. 1.
2nd, sending and receiving end random sequence synchronization process
The present invention using the method that two kinds of random sequences synchronize complete transmitting-receiving two-end for signal characteristic complication of eating dishes without rice or wine at
The synchronization of random sequence needed for reason.
The first is using sending and receiving end respective synchronization time, and stochastic ordering is input to as synchronous seed using TOD information
It is synchronous with RandomAmQue's that column-generation device completes sending and receiving end random sequence CipherS.
For second to transmit random number as the synchronization seed of random sequence generator by the use of radio control channel, realize with
Machine sequence C ipherS is synchronous with RandomAmQue's.
Above two method can all realize one time one change of random sequence, further improve the safety of system.
3rd, a kind of signal characteristic of eating dishes without rice or wine suitable for multi-signal system complicates processing method
(1) transmitting terminal eat dishes without rice or wine signal characteristic scrambling processing
The signal characteristic scrambling processes of eating dishes without rice or wine of the present invention mainly include phase upset and amplitude upsets two parts, first with
Random sequence needed for the generation of randomness sequence generator, and phase is carried out to modulated signal using random sequence CipherS
It upsets, random sequence RandomAmQue is recycled to carry out random permutation, principle such as Fig. 2 to the amplitude of signal after phase upset
It is shown.
Step 1：Phase is upset, the random sequence CipherS generated using synchronous seed modulated letters to conventional constellation
Number phase is into line disturbance.
Assuming that signal is after conventional constellation is modulatedWherein AmiAnd θiIt is x respectivelyiAmplitude and phase.
For i-th of modulation symbol, the random sequence of generation is the sequence C ipherS that length is 2K bitsi, K sizes can configure.At random
Sequence C ipherSiHigh K bit CipherSHiAs the phase pattern for calculating constellation upset, CipherSH is utilizediTo [0,2
π] radian carry out wait even partitions, segmentation minimum unit be [0,2 π].Random sequence CipherSiK bits of low level
CipherSLiAs the selection that phase is upset, phase place scramble is carried out to constellation point, principle is as shown in Figure 3.During so as to i
The rotatable phase for carving constellation point xi is：
△θi=CipherSLi*△Θ
Signal x ' after the upset of constellation point phaseiFor：
Step 2：Amplitude is upset, signal after being upset using the random sequence RandomAmQue of synchronous seed generation to phase
Amplitude dynamic adjustment obtain amplitude jammer signal x "i：
Wherein Am 'iAnd θi' it is to complete phase to upset amplitude and phase after upsetting with amplitude, the constellation for signal of eating dishes without rice or wine respectively
Figure can lose original feature.
(2) receiving terminal is eated dishes without rice or wine signal characteristic scramble process
Receiving terminal signal characteristic descrambling procedure of eating dishes without rice or wine is that transmitting terminal is eated dishes without rice or wine the reverse process of signal characteristic scrambling processes, is utilized
The synchronous seed random sequence generator identical with transmitting terminal generates identical random sequence.Successively to being sweared after completing channel equalization
The amplitude for measuring signal is restored to descramble with phase into line disturbance, reverts to the signal of eating dishes without rice or wine before scramble, principle is as shown in Figure 4.
Step 1：Amplitude descrambles, after the random sequence RandomAmQue generated using synchronous seed is to completing channel equalization
The amplitude A m ' of vector signaliRestored to obtain Ami。
Step 2：Phase descrambles, and utilizes the random sequence CipherS of the synchronous seed generation method meters identical with transmitting terminal
It calculates phase upset value and carries out phase descrambling, obtain signal yiFor：
Wherein AmiAnd θiRestore and the amplitude and phase after phase descrambling for amplitude.
Claims (8)
1. a kind of safe transmission method based on signal characteristic complication of eating dishes without rice or wine, it is characterised in that：It eats dishes without rice or wine signal including transmitting terminal
Feature is upset and receiving terminal is eated dishes without rice or wine, and signal characteristic descrambles, and the transmitting terminal eats dishes without rice or wine signal characteristic upset first with random sequence pair
Modulated signal carries out phase upset, then the signal after phase upset is obtained into line amplitude dynamic adjustment using random sequence
Amplitude jammer signal；The receiving terminal eat dishes without rice or wine signal characteristic descrambling first with the random sequence identical with transmitting terminal to complete believe
Signal after trace equalization restores to obtain amplitude descramble signal into line amplitude, and finally carrying out phase to amplitude descramble signal descrambles to obtain
Signal characteristic before phase upset.
2. a kind of safe transmission method based on signal characteristic complication of eating dishes without rice or wine according to claim 1, it is characterised in that：
The method that the phase is upset is：
(1) the random sequence CipherS that length is 2K bits is generated at randomi；
(2) random sequence CipherS is utilizediHigh K bit CipherSHiThe phase pattern for signal of eating dishes without rice or wine is calculated, obtains △ Θ
=2 π/(CipherSHi)；
(3) random sequence CipherS is utilizediK bit CipherSL of low leveliThe control that phase is upset is completed, calculates the i moment
Constellation point xiPhase upset value：△θi=CipherSLi*△Θ；
(4) signal x ' is obtained after carrying out phase upset to constellation pointiFor：
Wherein AmiAnd θi' for phase upset after signal amplitude and phase.
3. a kind of safe transmission method based on signal characteristic complication of eating dishes without rice or wine according to claim 2, it is characterised in that：
The amplitude dynamic adjustment is controlled using random sequence RandomAmQue.
4. a kind of safe transmission method based on signal characteristic complication of eating dishes without rice or wine according to claim 3, it is characterised in that：
The amplitude of signal is adjusted into Mobile state after being upset using random sequence RandomAmQue to phase, obtains signalWherein Am 'iAmplitude after being adjusted for dynamic.
5. a kind of safe transmission method based on signal characteristic complication of eating dishes without rice or wine according to claim 4, it is characterised in that：
Utilize random sequence RandomAmQue docking collections of letters yi" amplitude restored, obtain signalWherein
AmiAmplitude size after restoring for amplitude.
6. a kind of safe transmission method based on signal characteristic complication of eating dishes without rice or wine according to claim 5, it is characterised in that：
The method of phase descrambling is：Phase is calculated using random sequence CipherS using the method identical with transmitting terminal to upset
Value △ θi, obtaining signal yi after descrambling is：
Wherein θiPhase after descrambling for phase.
7. a kind of safe transmission method based on signal characteristic complication of eating dishes without rice or wine according to claim 6, it is characterised in that：
The sending and receiving end random sequence CipherS and RandomAmQue synchronize be using sending and receiving end respective synchronization time, use
TOD information is input to random sequence generator realization as synchronous seed.
8. a kind of safe transmission method based on signal characteristic complication of eating dishes without rice or wine according to claim 7, it is characterised in that：
The sending and receiving end random sequence CipherS and RandomAmQue synchronize be to be made using radio control channel transmission random number
What the synchronization seed for random sequence generator was realized.
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| CN201711372207.1A CN108234062A (en) | 2017-12-19 | 2017-12-19 | A kind of safe transmission method based on signal characteristic complication of eating dishes without rice or wine |
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| CN201711372207.1A CN108234062A (en) | 2017-12-19 | 2017-12-19 | A kind of safe transmission method based on signal characteristic complication of eating dishes without rice or wine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112039626A (en) * | 2020-11-04 | 2020-12-04 | 电子科技大学 | Random phase modulation method depending on communication distance |
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| CN112039626A (en) * | 2020-11-04 | 2020-12-04 | 电子科技大学 | Random phase modulation method depending on communication distance |
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