CN1120593C - Single-wire chaotic secret communication system - Google Patents
Single-wire chaotic secret communication system Download PDFInfo
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- CN1120593C CN1120593C CN98101231A CN98101231A CN1120593C CN 1120593 C CN1120593 C CN 1120593C CN 98101231 A CN98101231 A CN 98101231A CN 98101231 A CN98101231 A CN 98101231A CN 1120593 C CN1120593 C CN 1120593C
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- receiver
- transmitter
- chaotic
- signal
- resistance
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Abstract
The present invention relates to a single-wire chaotic secret communication system which comprises a transmitter 1 composed of a deformed Cai's circuit, a receiver 2 with the same structure as that of the transmitter and an operational amplifier connecting with the transmitter1 and the receiver 2, wherein after chaotic signals generated by the transmitter 1 are added to input signals in an adder, one path is transmitted to the receiver 2, and the other path is transmitted to the transmitter 1 by a feedback resistor Rc. The present invention organically combines information signals with chaotic circuits, and the generated chaotic signals contain information signals. Even if the information signals and the chaotic signals have the same order of magnitude, the single-wire chaotic secret communication system can still realize the chaotic control of the receiver by the transmitter.
Description
Technical field
The invention belongs to chaotic secret communication, particularly carry out the system of chaotic secret communication with single line or single transmission signals.
Background technology
It doesn't matter for chaotic signal and information signal in the existing single-wire chaotic secret communication.The two addition becomes single transmission signals, is transferred to receiver from transmitter, and its receiver control makes the Receiver And Transmitter chaos synchronous.Because chaotic signal that receiver produces and transmitter is identical, the chaotic signal that deducts receiver from transmission signals has just recovered information signal.Synchronous for the chaos that can realize Receiver And Transmitter, necessarily require chaotic signal very greater than information signal.Owing to exist noise inevitably in the circuit, in transmission course, also can run into various interference.This interference and noise may have close intensity with information signal.Just require whole system that high signal to noise ratio is arranged for this reason, thereby increased the difficulty that realizes on the engineering.
Summary of the invention
The objective of the invention is to make to transmit becomes the part of chaos circuit, and information signal can have the same order of magnitude with chaotic signal.
For achieving the above object, a kind of single-wire chaotic secret communication system, comprise the transmitter (1) of deformed cai's circuit formation, the receiver (2) and the operational amplifier that be connected transmitter (1), receiver (2) identical with transmitter architecture, it is characterized in that chaotic signal that transmitter (1) produces and input signal are in adder after the addition, one the tunnel is transferred to receiver (2), and another road is by feedback resistance (R
c) be transferred to transmitter (1), when transmission signals arrives receiver (2), lead up to resistance (R
c) input receiver, the chaotic signal that another road and receiver produce subtracts each other, and information signal is recovered fully.
The present invention organically combines information signal and chaos circuit, and promptly transmitting becomes the part of chaotic signal, participates in the chaos generating process.Therefore the chaotic signal itself that produces has comprised information signal.So even information signal and chaotic signal have the same order of magnitude, still can realize the chaos controlling of transmitter to receiver.
Description of drawings
Fig. 1 is a system diagram of the present invention.
Fig. 2 is a circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing in detail the present invention is described in detail.We are divided into two parts with the isolator that operational amplifier makes with deformed cai's circuit, are called part A and B.The chaotic signal a of part B output and information signal b addition in adder of input, at this moment information signal is modulated or is encrypted by chaotic signal.The signal one tunnel that obtains in adder is transferred to receiver, and resistance R is passed through on another road
CFeed back to part B.That is to say part B through adder after adding information signal indirectly to the part A effect.Thereby make part A and part B form a complete chaos circuit.The chaotic signal itself that this chaos circuit produces also is subjected to the influence of information signal, so information signal organically participates in the generation of chaotic signal, and unlike double-wire chaotic communication system or former single line communication system, the generation of information signal and chaos circuit or chaos has nothing to do.Above-mentioned said part A is by C
2LR
0C
3R
3Form, part B is by RC
1N
RForm.Because the effect of isolator, signal can only be transferred to part B from part A, promptly can only part B directly be acted on part A, and part B can not be directly to the part A effect.
When the transmission signals that comprises information signal and chaotic signal arrived receiver through another isolator one-way transmission, a road of this transmission signals was sent into the part B of receiver, and subtracter is sent on another road.This transmission signals plays the effect (this is chaos controlling) of receiver control, make the chaotic signal a of chaotic signal a ' that receiver section B produces and transmitter section B generation identical, this makes chaos synchronous, promptly by transmitter the chaos controlling of receiver has been realized that the chaos of Receiver And Transmitter is synchronous.So after this chaotic signal a ' and transmission signals subtract each other, just obtained the information signal b ' that recovers fully in subtracter.If think the intercepting message signal, can only intercept the signal in the transmission, but because transmission signals is the result of information signal and chaotic signal addition, so can't identify information signal.
The circuit structure of transmitter and receiver is identical.Corresponding element is identical, but this is identical on the nominal value, measured value can have ± and the difference of 5--10%.Can also realize that in this case chaos controlling and chaos are synchronous, prove absolutely that there is very strong robustness (Robustness) in this system, promptly transmitter and receiver has good compatibility.This is very important to practical application, because in fact we can't make the identical of transmitter and receiver corresponding elements value work.Because above-mentioned change has been arranged, make us double-wire chaotic communication can be reduced to single-wire chaotic communication, and the information signal of the communication of the single-wire chaotic before having overcome will be very less than the shortcoming of chaotic signal.
Claims (2)
1. single-wire chaotic secret communication system, comprise the transmitter (1) of deformed cai's circuit formation, the receiver (2) and the operational amplifier that be connected transmitter (1), receiver (2) identical with transmitter architecture, it is characterized in that chaotic signal that transmitter (1) produces and input signal are in adder after the addition, one the tunnel is transferred to receiver (2), and another road is by feedback resistance (R
c) be transferred to transmitter (1), when transmission signals arrives receiver (2), lead up to resistance (R
c) input receiver, the chaotic signal that another road and receiver produce subtracts each other, and information signal is recovered fully.
2. by the described single-wire chaotic secret communication system of claim 1, it is characterized in that said transmitter (1) and receiver (2) are made of chaos circuit A and B, the centre is connected by operational amplifier, described chaos circuit A comprises inductance (L), one end is connected to operational amplifier, and the other end is connected to resistance (R
0), resistance (R
0) the other end and parallel resistor (R
3) and electric capacity (C
3) connect electric capacity (C
2) an end be connected other end ground connection with inductance (L); Described chaos circuit B comprises resistance (R), and an end is connected with the output of operational amplifier, the other end and electric capacity (C in parallel
1) and adjustable resistance (N
R) connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98101231A CN1120593C (en) | 1998-03-30 | 1998-03-30 | Single-wire chaotic secret communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98101231A CN1120593C (en) | 1998-03-30 | 1998-03-30 | Single-wire chaotic secret communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1230831A CN1230831A (en) | 1999-10-06 |
| CN1120593C true CN1120593C (en) | 2003-09-03 |
Family
ID=5216551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98101231A Expired - Fee Related CN1120593C (en) | 1998-03-30 | 1998-03-30 | Single-wire chaotic secret communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1120593C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826839B (en) * | 2010-04-19 | 2011-12-07 | 浙江大学 | Inverter-based chaotic oscillating circuit |
| CN102142956A (en) * | 2011-04-20 | 2011-08-03 | 河南化工职业学院 | Two-dimensional chaotic circuit and two-dimensional chaotic privacy communication system thereof |
| CN103414548B (en) * | 2013-07-11 | 2016-02-24 | 南京师范大学 | A kind of Cai Shi Synchronization of Chaotic Systems control circuit based on feedback current design |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078835A (en) * | 1992-05-12 | 1993-11-24 | 浙江大学 | Based on " chaos " theoretical signal encryption method and system |
| US5696826A (en) * | 1994-06-07 | 1997-12-09 | Gao; Zhenyu | Method and apparatus for encrypting and decrypting information using a digital chaos signal |
-
1998
- 1998-03-30 CN CN98101231A patent/CN1120593C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078835A (en) * | 1992-05-12 | 1993-11-24 | 浙江大学 | Based on " chaos " theoretical signal encryption method and system |
| US5696826A (en) * | 1994-06-07 | 1997-12-09 | Gao; Zhenyu | Method and apparatus for encrypting and decrypting information using a digital chaos signal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1230831A (en) | 1999-10-06 |
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