CN109302260A - A kind of automobile wireless communication anti-eavesdrop safety protecting method based on multi-antenna technology - Google Patents
A kind of automobile wireless communication anti-eavesdrop safety protecting method based on multi-antenna technology Download PDFInfo
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- CN109302260A CN109302260A CN201810939227.0A CN201810939227A CN109302260A CN 109302260 A CN109302260 A CN 109302260A CN 201810939227 A CN201810939227 A CN 201810939227A CN 109302260 A CN109302260 A CN 109302260A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005516 engineering process Methods 0.000 title claims abstract description 19
- 230000006854 communication Effects 0.000 title abstract description 30
- 238000004891 communication Methods 0.000 title abstract description 28
- 238000012549 training Methods 0.000 claims abstract description 16
- 108091006146 Channels Proteins 0.000 claims 3
- 238000011161 development Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/40—Jamming having variable characteristics
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A kind of vehicle wireless communication anti-eavesdrop safety protecting method based on multi-antenna technology, comprising the following steps: step 1: signal transceiver first sends training sequence to vehicle-mounted multiple antennas transceiver to carry out channel estimation；Step 2: multiple antenna is set in vehicle-mounted multiple antennas transceiver to receive to training sequence signal, and estimates the channel state information between signal transceiver antenna and vehicle-mounted multiple antennas transceiver antenna according to training sequence；Step 3: consider channel gain, constantly debug its weight ratio, so that the signal of vehicle-mounted every antenna of multiple antennas transceiver transmitting signal Downward addition in arriving signal transceiver reaches most strong, and signal interferes with each other when reaching interception facility, so that the information distortion that interception facility receives, to reach anti-eavesdrop purpose.The protection of illegal wiretapping, can solve vehicle communication safety problem in Vehicular intelligent development process when the present invention can be achieved to operate normally vehicle.
Description
Technical field
The present invention relates to in-vehicle wireless communication security technology areas, suitable for having the vehicle of multi-aerial radio communication system
, and in particular to a method of the physical layer algorithm based on multi-antenna transmission channel realizes that Theft-proof for vehicle is listened.
Background technique
In recent years, with vehicle intellectualized and net connectionization technology fast development, automobile has no longer been one closed
Body.Due to wirelessly communicating the application of interconnection technique, so that vehicle and vehicle (Vehicle-to-Vehicle, V2V), vehicle and infrastructure
(Vehicle-to-Infrastructure, V2I), the information exchange of Che Yuyun (Vehicle-to-Cloud, V2C) becomes can
Energy.But open communication network is but also a possibility that intelligent network connection automobile faces network attack.For example, information of vehicles is being handed over
It maliciously intercepted and captured, eavesdropped during changing, cause the individual privacy of car owner to reveal, and then lead to immeasurable consequence.Vehicle
The main target of anti-eavesdrop research is to prevent listener-in from monitoring the information in vehicle communication, steal decoding, and utilizing and steal
Information is listened to initiate active attack to vehicle.It is therefore proposed that a kind of method of anti-eavesdrop is important the one of universal intelligent network connection automobile
Ring.
Multi-antenna technology is because improving communication quality, and making full use of space resources etc., there is apparent advantages.And
And in the case where not increasing frequency spectrum resource and antenna transmission power, system channel capacity and communication speed can be increased exponentially
Rate is accordingly regarded as the core technology of next generation mobile communication.An important ring of the vehicle communication as mobile communication, by multiple antennas
Technical application has become the inevitable new trend of vehicle development into automobile wireless communication.
For anti-eavesdrop technology at this stage mainly for military application, the anti-eavesdrop research based on vehicle is relatively fewer,
But with being gradually increased for Vehicular intelligent degree, the Communication Security Problem that automobile faces is got worse.For example, when between vehicle
The communication information by people malice eavesdrop, may cause the leakage of personal information of car owner, attacker is engaged in non-using the information of acquisition
The behaviors such as method fraud；The partial information that attacker may also can will intercept, is intercepted, is distorted, interfering intelligent automobile just
Often traveling.
In view of this, there is an urgent need to provide a kind of Theft-proof for vehicle to listen method, so as to the safety in support vehicles communication process
Property and integrality.
Summary of the invention
This patent is designed to provide a kind of automobile wireless communication anti-eavesdrop security protection side based on multi-antenna technology
Method prevents listener-in from monitoring the information in vehicle communication, steals decoding, and stolen information is utilized to initiate vehicle
Attack.
To achieve the above object, the present invention will take following technical scheme: a kind of automobile wireless based on multi-antenna technology
Communicating anti-eavesdrop method, which is characterized in that the method for the invention is a kind of physical layer algorithm for multi-antenna transmission channel,
The algorithm can interfere with interception facility or instrument, and then realize that Theft-proof for vehicle is listened；Further, multi-antenna technology can also basis
The adaptively selected transmission channel of the feature of different channels, the signal for emitting every antenna reach in legitimate receipt end Downward addition
Signal strength is most strong, and offsets each other in other node signals, reduces the legitimate node bit error rate, increases interception facility to message
Difficulty of eavesdropping, to achieve the purpose that Theft-proof for vehicle is listened.
A kind of automobile wireless communication anti-eavesdrop method based on multi-antenna technology, comprising the following steps:
Step 1: firstly, signal transceiver first sends training sequence to vehicle-mounted multiple antennas transceiver to carry out channel estimation；
Step 2: being arranged multiple antenna to receive to training sequence signal in vehicle-mounted multiple antennas transceiver, and according to
Training sequence estimates the channel state information between signal transceiver antenna and vehicle-mounted multiple antennas transceiver antenna；
Step 3: considering channel gain, constantly debug its weight ratio, so that every antenna hair of vehicle-mounted multiple antennas transceiver
The signal penetrated signal Downward addition in arriving signal transceiver reaches most strong, and signal interferes with each other when reaching interception facility,
So that the information distortion that interception facility receives, to reach anti-eavesdrop purpose.
In the step 1, in communication process, information transceiver sends training sequence to vehicle-mounted multiple antennas transceiver
Purpose is the channel coefficients and channel quality for estimating the antenna arrival receiving end of signal transceiver.
In the step 2, signal and the original signal that vehicle-mounted multiple antennas transceiver receives every antenna compare
It is right, to estimate the channel coefficients and channel quality of every antenna.
In the step 3, the channel gain between signal transceiver and vehicle-mounted multiple antennas transceiver must be sufficiently large, with
Guarantee that message can smoothly be transferred to receiving end.Therefore, vehicle-mounted multiple antennas transceiver presets a channel capacity thresholding Q.
And message is sent by the way of multiple antennas when automobile wireless communication.
Using Shannon's theorems as theoretical foundation, vehicle-mounted multiple antennas transceiver is according to every transmitting antenna source and signal transceiver
The corresponding channel quality of single antenna and channel quality corresponding with interception facility constantly debug vehicle-mounted multiple antennas transceiver every hair
It penetrates aerial signal weight and adjusts antenna direction, make the channel capacity C at signal transceiverRMore than or equal to channel capacity
Thresholding Q, and the interception facility channel capacity C in other placesWLess than channel capacity thresholding Q.Due to the letter of legal signal transceiver
Road capacity is more than or equal to channel capacity thresholding Q, therefore to reach intensity most strong for signal Downward addition.And in other node locations
Interception facility channel capacity be less than channel capacity thresholding Q, therefore signal has and offsets each other in various degree, increases eavesdropping and sets
The standby Difficulty of eavesdropping to message, to achieve the purpose that Theft-proof for vehicle is listened.
Automobile wireless can be communicated by the above method and carry out eavesdropping security protection, prevent listener-in in vehicle communication
Information monitored, steal decoding, and stolen information is utilized to launch a offensive vehicle, Vehicular intelligentization development can be solved
Automobile wireless communication information safety problem in the process.
The beneficial effects of the present invention are:
The information in vehicle communication is monitored for rogue attacks person, is stolen, the invention proposes one kind based on more
The automobile wireless of antenna technology communicates anti-eavesdrop method, and this method is related to vehicle-mounted multi-antenna communications technology and safety of physical layer is calculated
Method, can be obviously improved the communication efficiency of normal information, and interference illegal wiretapping equipment obtains information, ensured the hidden of vehicle communication
Private provides necessary condition for intelligent vehicle and the universal of intelligent transportation.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 is that a kind of automobile wireless based on multi-antenna technology of the present invention communicates anti-eavesdrop security protection schematic diagram
Fig. 2 is the process that a kind of automobile wireless based on multi-antenna technology of the present invention communicates anti-eavesdrop security protection model
Figure.
Number explanation:
1. vehicle-mounted multiple antennas transceiver；2. signal transceiver；3. interception facility.
Specific embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
Anti-eavesdrop system model schematic diagram is communicated as shown in Figure 1 for vehicle multi-antenna wireless.It include 1 vehicle-mounted more in system
Antenna receiving and sending machine: match multiple antennas transceiver, communication message safety to be transferred to destination node；2 signal transceivers: it is set
Standby complexity limits, outfit single antenna Transmit-Receive Unit；3 interception facilities.
Vehicle-mounted multiple antennas transceiver is formed a line using R root antenna emits signal, and the distance between every two antennas are hair
The half of signal wavelength is penetrated, is not interfere with each other between the signal to guarantee any two antennas transmission.Whether the conducting of every antenna
Switch control is connected by it.The power power that every antenna sends signal is controlled by power divider.
In addition, vehicle-mounted multiple antennas transceiver can estimate every antenna and signal transmitting and receiving according to the training signal received
The distance of device, vehicle-mounted multiple antennas transceiver reach each signal outside vehicle by the phase that every antenna of control sends signal
Lucky Downward addition when signal transceiver, the allied signal that multiple antennas is formed signal strength at purpose receiving end are most strong.And
The signal that different antennae is sent on other directions interferes with each other, and signal quality is weaker than legitimate receipt end, to realize anti-eavesdrop
Purpose.
Vehicle multi-aerial radio communication system safety of physical layer transmits the detailed process of anti-eavesdrop as shown in Fig. 2, it is specific
Operation it is as follows:
S202: signal transceiver first sends training sequence to vehicle-mounted multiple antennas transceiver；
S204: vehicle-mounted multiple antennas transceiver estimates the channel gain of every antenna according to the training sequence received, with this
Channel estimation is carried out, estimates channel coefficients and channel quality that transmission antenna reaches vehicle-mounted multiple antennas transceiver end, and according to
The transmission power and intensity of vehicle-mounted multiple antennas transceiver are adjusted according to these estimated values,
And vehicle-mounted multiple antennas transceiver receives signal using multiple antenna, and every antenna is received
Signal is compared with original signal, then estimated according to training sequence each vehicle-mounted multiple antennas transceiver transmission antenna and
Channel state information between signal transceiver receiving antenna；
S206: vehicle-mounted multiple antennas transceiver estimates the channel gain of every antenna according to the training sequence received, considers
Channel gain constantly debugs its weight ratio so that vehicle-mounted every antenna of multiple antennas transceiver transmitting signal reach it is legal
Downward addition signal reaches most strong when signal transceiver, and the signal of the received every antenna of the interception facility in other places is mutual
Interference, so that the information distortion intercepted, to reach anti-eavesdrop purpose；
S208: vehicle-mounted multiple antennas transceiver sends information；
S210: vehicle data safe transmission.
The present invention uses vehicle-mounted multiple antennas transceiver, by the multiple antenna of vehicle-mounted multiple antennas transceiver according to actual requirement
The mode of switching transmitting information sends the communication information, there is the omnidirectional as several in the transmission array of vehicle-mounted multiple antennas transceiver
Radiating antenna array element, the as emission source of multiple antennas described in this patent, bay indicate are as follows: 1,2,3,4..., n；Wherein, often
Root transmitting antenna source channel quality corresponding with signal transceiver single antenna is expressed as follows with one-dimension array:
GTR=[gT1, R, gT2, R, gT3, R..., gTn, R]T
Wherein, gTi, RIndicate the channel gain of i-th transmitting antenna and signal transceiver single antenna in n antenna:
T- indicates vehicle-mounted multiple antennas transceiver (Transmitter)；
R- indicates signal transceiver (Receiver)；
It is assumed that interception facility is sent to disappearing for legal signal transceiver to vehicle-mounted multiple antennas transceiver using s root antenna
Breath is eavesdropped, and the channel vector credit that the i-th antenna of interception facility receives the jth root antenna of vehicle-mounted multiple antennas transceiver is
gTi, Wj, so, channel quality can be expressed as the matrix of m × s between vehicle-mounted multiple antennas transceiver and interception facility:
In formula, T- indicates vehicle-mounted multiple antennas transceiver (Transmitter)；
W- indicates interception facility (wiretap)；
GTRAnd GTWIt all obeys standard gaussian and is distributed S；
The information of each antenna channel transmission is not related independently of each other, and all transmitting array element is all opened with high-speed radio-frequency
It closes to control transmitting signal.The signal that every antenna receives is compared vehicle-mounted multiple antennas transceiver with original signal.So
Estimated afterwards according to training sequence between each vehicle-mounted multiple antennas transceiver transmission antenna and signal transceiver receiving antenna
Channel state information.In order to enable the signal Downward addition that the signal of every antenna transmitting reaches legal signal transceiver reaches
It is most strong, it needs constantly to debug its weight ratio, wherein the weight coefficient of i-th of transmitting antenna signal of vehicle-mounted multiple antennas transceiver
Are as follows:
In formula, dkIndicate that vehicle-mounted multiple antennas transceiver and signal transceiver arrange the random spread spectrum sequence for intending to use in advance
Column；
gTi, RIndicate that i-th antenna of vehicle-mounted multiple antennas transceiver is sent to the channel gain of signal transceiver；
Although multi-antenna technology is improving communication quality, there is apparent advantage in terms of making full use of space resources, by
In from diversity antenna technology, a bottleneck that can not be broken through is present in the channel capacity of multi-input multi-output system, that
It is exactly Shannon capacity limitation:
C=Wlog2(1+ρ|Qi|2)
In formula, C- indicates Shannon capacity；
W- indicates frequency bandwidth；
QiIndicate the weight coefficient of i-th of transmitting antenna signal；
ρ-expression receiving antenna signal-to-noise ratio；
Vehicle-mounted multiple antennas transceiver presets a channel capacity thresholding Q.By Shannon theory it is found that if information source
Shannon capacity C is more than or equal to channel capacity thresholding Q, then, theoretically there is a kind of method can make the output of information source
Transmission can be passed through with arbitrarily small error probability.If the Shannon capacity C of opposite information source is less than channel capacity thresholding
Q, then transmit such information without any method, and the error rate for transmitting such binary message in other words is 1/2.
To which vehicle-mounted multiple antennas transceiver is according to every transmitting antenna source channel matter corresponding with signal transceiver single antenna
Measure GTRWith channel quality G corresponding with interception facilityTw, constantly update every transmitting antenna signal power of vehicle-mounted multiple antennas transceiver
Weight QiAnd antenna direction is adjusted, the Shannon capacity C at signal transceiver is madeRMore than or equal to channel capacity thresholding Q, and its
The interception facility Shannon capacity C in its placeWLess than channel capacity thresholding Q.It is received and dispatched using the vehicle-mounted multiple antennas of mutiple antennas array
Machine, according to the output of each bay of weight coefficient weighted array, to form specific antenna space pattern.Antenna main beam
The direction of direction registration signal transceiver, secondary lobe or zero point are aligned on the direction of other tapped signals arrival, are received using signal
The signal of device is sent out, while being able to suppress tapped signal.Since the signal Downward addition of legal signal transceiver reaches signal strength
It is most strong, and have in other node location signals and offset each other in various degree, increase interception facility to the Difficulty of eavesdropping of message,
To achieve the purpose that Theft-proof for vehicle is listened.
Claims (1)
1. a kind of automobile wireless based on multi-antenna technology communicates anti-eavesdrop safety protecting method, which is characterized in that including as follows
Step:
Step 1: signal transceiver first sends training sequence to vehicle-mounted multiple antennas transceiver to carry out channel estimation, wherein described
Vehicle-mounted multiple antennas transceiver sends the omnidirectional antenna array element having as several in array, to have multi-antenna mode；
Step 2: setting multiple antenna receives training sequence signal in the vehicle-mounted multiple antennas transceiver, then institute
It states vehicle-mounted multiple antennas transceiver and estimates that the antenna of the signal transceiver and the vehicle-mounted multiple antennas are received and dispatched according to training sequence
Channel state information between machine antenna；
Step 3: considering channel gain, constantly debug its weight ratio, so that every antenna hair of the vehicle-mounted multiple antennas transceiver
The signal penetrated signal Downward addition when reaching the signal transceiver reaches most strong, and signal is mutually dry when reaching interception facility
It disturbs, so that the information distortion that the interception facility receives, to reach anti-eavesdrop purpose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810939227.0A CN109302260B (en) | 2018-08-17 | 2018-08-17 | Vehicle wireless communication anti-eavesdropping safety protection method based on multi-antenna technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810939227.0A CN109302260B (en) | 2018-08-17 | 2018-08-17 | Vehicle wireless communication anti-eavesdropping safety protection method based on multi-antenna technology |
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| CN109302260A true CN109302260A (en) | 2019-02-01 |
| CN109302260B CN109302260B (en) | 2020-11-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113539225A (en) * | 2021-07-22 | 2021-10-22 | 北京电信易通信息技术股份有限公司 | On-vehicle anti-eavesdropping device based on strong acoustic transducer array |
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| CN102223628A (en) * | 2011-05-27 | 2011-10-19 | 中国人民解放军信息工程大学 | Frequency domain encryption method and device for random subcarrier weight |
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| CN109302260B (en) | 2020-11-03 |
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