CN107995615A - Heterogeneous network NOMA safe transmission method of physical layer - Google Patents
Heterogeneous network NOMA safe transmission method of physical layer Download PDFInfo
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- CN107995615A CN107995615A CN201711129923.7A CN201711129923A CN107995615A CN 107995615 A CN107995615 A CN 107995615A CN 201711129923 A CN201711129923 A CN 201711129923A CN 107995615 A CN107995615 A CN 107995615A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
- H04W52/283—Power depending on the position of the mobile
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Quality & Reliability (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention belongs to field of communication technology, more particularly to a kind of heterogeneous network NOMA safe transmission method of physical layer, realizes that process is as follows：For each validated user of heterogeneous network with non-orthogonal multiple NOMA technologies, the signal power coefficient of each validated user is serviced by configuring NOMA, and kernel man made noise's distribution coefficient is configured according to validated user position distribution, the peace transmission of heterogeneous network NOMA physical layers is carried out according to the signal power coefficient of configuration and kernel man made noise distribution coefficient.The present invention passes through reasonable disposition man made noise, strengthening system is when tapping channel quality is better than validated user channel quality for the resilience of passive wiretapping, the safety of physical layer performance that NOMA is wirelessly transferred in lifting heterogeneous network, enhancing NOMA systems resist the ability of potential silent eavesdropping, especially in the case where tapping channel quality is better than validated user channel quality, the safety of physical layer performance of lifting system, the safe transmission in the mobile communication system higher available for user density such as isomery Cellular Networks.
Description
Technical field
The invention belongs to mobile communication technology field, more particularly to a kind of heterogeneous network NOMA safe transmission method of physical layer,
Safe transmission in the mobile communication system higher available for user density such as isomery Cellular Networks.
Background technology
Due to being continuously increased for number of users and data traffic, mobile communications network development forms isomery Cellular Networks and close
Collect the forms such as isomery Cellular Networks, to lift the reuse rate of frequency spectrum resource and space resources.At the same time, in order to dilute in frequency spectrum resource
Further meet the mobile service demand being skyrocketed through under conditions of lacking, non-orthogonal multiple (NOMA) technology is increasingly subject to industry
Attention.The basic thought of NOMA technologies is to use nonopiate transmission in transmitting terminal, actively introduces interference information, leads in receiving terminal
Cross serial interference and delete the correct demodulation of (Successive Interference Cancellation, SIC) realization.The technology
Essence is to exchange spectrum efficiency for by lifting the complexity of receiving terminal.The subchannel transmission of NOMA technologies still uses orthogonal frequency
Divide multiplexing (Orthogonal Frequency-Division Multiplexing, OFDM) technology, just interacted between subchannel
Do not disturb, but a sub-channels are no longer assigned to only a user, but by multiple users to share.It is different in same subchannel to use
Inter-user interference problem caused by non orthogonal transmissions between family using SIC technologies in receiving terminal, it is necessary to carry out Multiuser Detection.
In transmitting terminal, the different user in same subchannel is transmitted using power sharing technology, the signal power of different user
It is allocated according to relevant algorithm so that the signal power of each user is different at receiving terminal.By SIC technologies according to not
Interference elimination is carried out in a certain order with signal power size with family, realizes correct demodulation, while has also been reached differentiation and used
The purpose at family.NOMA technologies are applied in the higher mobile communication system of the user density such as isomery Cellular Networks, by significant increase frequency
The utilization rate of spectrum resource.It is similar with other wireless communication techniques, due to caused by wireless channel broadcast and open characteristics
Safety problem is the basic problem in NOMA Technique Popularizings and application process.Traditional safe practice generally use upper strata key adds
Close means ensure the safety of information transmission, simple to rely on upper strata Key Encryption Technology, it is difficult to which fully reply future network is more
The security threat of sample.
The safety of physical layer technology of rising in recent years, is extended to physical layer, with upper strata by secure wireless communication security system
Key Encryption Technology mutually supplements, and can construct more multi-faceted secure wireless communication security system.NOMA technologies are due to using
Nonopiate transmission, actively introduces interference information, and there are certain natural interior raw physical layer safety feature.Although NOMA technologies are had
Standby natural interior raw physical layer security feature can cause illegal wiretapping certain difficulty, but be difficult to fully tackle tapping channel
Quality is better than security threat during validated user channel quality.It is better than validated user in tapping channel quality therefore, it is possible to possess
The NOMA safe transmission method of physical layer that potential silent eavesdropping capability is resisted in the case of channel quality is extremely urgent.
The content of the invention
For deficiency of the prior art, the present invention provides a kind of heterogeneous network NOMA safe transmission method of physical layer, lifting
The safety of physical layer performance that NOMA is wirelessly transferred in heterogeneous network, enhancing NOMA systems resist the ability of potential silent eavesdropping, especially
It is in the case where tapping channel quality is better than validated user channel quality.
According to designing scheme provided by the present invention, a kind of heterogeneous network NOMA safe transmission method of physical layer, for utilization
The each validated user of heterogeneous network of non-orthogonal multiple NOMA technologies, the signal power system of each validated user is serviced by configuring NOMA
Number, and kernel man made noise's distribution coefficient is configured according to validated user position distribution, according to the signal power coefficient of configuration and
Kernel man made noise distribution coefficient carries out the peace transmission of heterogeneous network NOMA physical layers.
Above-mentioned, specifically comprising following content：
A all validated users serviced at the same time using NOMA technologies in heterogeneous network transmitting terminal) are directed to, measure each validated user
The distance between transmitting terminal, obtains the position distribution of each validated user；
B) according to the distance between each validated user and transmitting terminal, the channel matter between each validated user and transmitting terminal is measured
Amount；
C) resequenced according to channel quality to validated user；
D) according to the position distribution and channel quality of validated user, the distribution coefficient group of each validated user signal is configured, should
Distribution coefficient group includes at least signal power distribution coefficient and kernel man made noise's distribution coefficient；
E heterogeneous network NOMA safe transmissions) are carried out according to distribution coefficient group.
Above-mentioned, A) in the distance between each validated user of measurement and transmitting terminal, through but not limited to GPS rangings, the Big Dipper
Ranging, base station ranging and mixed distance measuring method carry out range measurement.
Above-mentioned, B) according to the distance between each validated user and transmitting terminal, and fading channel gain and path loss
Index, obtains the channel quality between each validated user and transmitting terminal.
Preferably, B) in channel quality between each validated user and transmitting terminal be expressed asWherein,Table
Show k-th of validated user ukMultipath fading channel gain between transmitting terminal, hkRepresent ukChannel matter between transmitting terminal
Amount, α are path loss index, LkFor validated user ukThe distance between transmitting terminal.
Preferably, C) in resequenced according to channel quality to validated user so that after sequence channel quality meet |
h1|2≤|h2|2≤…≤|hK|2, wherein, K represents all validated users sum that transmitting terminal services at the same time.
Above-mentioned, D) in, the data rate and targeted rate and signal transmission power that are obtained according to validated user, to each conjunction
Method subscriber signal power partition coefficient and kernel artifact power's distribution coefficient are configured.
Preferably, D) in validated user obtain data rate RkIt is expressed as：Its
In, P represents signal transmission power, ck>=0 represents signal power distribution coefficient, ckConfiguration meet：c1≥c2≥…≥cK、And c1+c2+…+cK=1- η,For kernel artifact power's distribution coefficient,Represent k-th of use
The targeted rate at family, K represent all validated users sum that transmitting terminal services at the same time, LmaxRepresent the conjunction that transmitting terminal services at the same time
Distance in method user corresponding to the user farthest apart from transmitting terminal, D0Represent the maximum service radius that server-side provides, σ2Represent
Noise power.
Above-mentioned, E) in when carrying out the transmission of NOMA safety of physical layer according to configuration coefficients group, if distribution coefficient group exists not
When unique, the signal power distribution coefficient in one group of kernel artifact power distribution coefficient maximum is taken to be made as transmission
Signal power distribution coefficient.
Beneficial effects of the present invention：
Potential security threat degree of the present invention according to suffered by validated user, passes through reasonable disposition man made noise, enhancing system
System, for the resilience of passive wiretapping, lifts NOMA in heterogeneous network when tapping channel quality is better than validated user channel quality
The safety of physical layer performance being wirelessly transferred, enhancing NOMA systems resist the ability of potential silent eavesdropping, especially in tapping channel
In the case that quality is better than validated user channel quality, the safety of physical layer performance of lifting system, available for isomery Cellular Networks etc.
Safe transmission in the higher mobile communication system of user density, there is important guidance to anticipate the safety of cordless communication network
Justice.
Brief description of the drawings：
Fig. 1 is the heterogeneous network NOMA safe transmission method of physical layer flow charts in embodiment.
Embodiment：
To make the object, technical solutions and advantages of the present invention clearer, clear, below in conjunction with the accompanying drawings with technical solution pair
The present invention is described in further detail.
It is difficult to security threat when fully reply tapping channel quality is better than validated user channel quality for NOMA technologies
Etc. situation, the embodiment of the present invention provides a kind of heterogeneous network NOMA safe transmission method of physical layer, for non-orthogonal multiple
The each validated user of heterogeneous network of NOMA technologies, services the signal power coefficient of each validated user by configuring NOMA, and according to
Validated user position distribution configures kernel man made noise's distribution coefficient, artificial according to the signal power coefficient and kernel of configuration
Noise allocation coefficient carries out the peace transmission of heterogeneous network NOMA physical layers.
For potential security threat degree according to suffered by validated user to carry out the reasonable disposition of man made noise, of the invention is another
A kind of heterogeneous network NOMA safe transmission method of physical layer of one embodiment, it is shown in Figure 1, include following content：
S101 is directed to all validated users serviced at the same time using NOMA technologies in heterogeneous network transmitting terminal, measures each legal use
The distance between family and transmitting terminal, obtain the position distribution of each validated user；
S102 measures the channel between each validated user and transmitting terminal according to the distance between each validated user and transmitting terminal
Quality；
S103 resequences validated user according to channel quality；
S104 configures the distribution coefficient group of each validated user signal according to the position distribution and channel quality of validated user,
The distribution coefficient group includes at least signal power distribution coefficient and kernel man made noise's distribution coefficient；
S105 carries out heterogeneous network NOMA safe transmissions according to distribution coefficient group.
Potential security threat degree according to suffered by validated user, by reasonable disposition man made noise, strengthening system is being stolen
Listen channel quality when validated user channel quality for the resilience of passive wiretapping, the safety of physical layer of lifting system
Energy.
In above-mentioned, validated user can be but not limited to：Mobile terminal device (mobile phone, Pad etc.), isomery in heterogeneous network
Internet of things equipment (car networking carrier, unmanned plane, smart home device etc.) in net, other need to access heterogeneous wireless network
Equipment.Transmitting terminal can be but not limited to：Various types of small base stations, remote radio in macro base station, heterogeneous network in heterogeneous network
Head (Remote Radio Head, RRH), wireless network access point (Access Point, AP), communications satellite and other forms
Wireless network transmitting terminal.The distance between validated user and transmitting terminal are measured, its measuring method can be but not limited to：GPS
Ranging, Big Dipper ranging, base station ranging and various ways mixed ranging.
With reference to the measurement of distance between validated user and transmitting terminal, one more embodiment of the present invention provides a kind of heterogeneous network
NOMA safe transmission method of physical layer, itself the specific implementation process is as follows：
Step 1：The distance between each validated user and transmitting terminal are measured, represents that the user of transmitting terminal while service is total with K
Number, with ukRepresent k-th of user (k ∈ { 1 ..., K }) in user's set that transmitting terminal is serviced, measurement validated user ukWith hair
Penetrate the distance between end Lk。
Step 2：The channel between each validated user and transmitting terminal is measured, with hkRepresent ukChannel between transmitting terminal, is surveyed
Amount penetrates the multipath fading channel gain held between k-th serviced of user and transmitting terminalThenWherein α
For path loss index.
Step 3：Resequenced according to channel quality to validated user, represent that the user that transmitting terminal is serviced is total with K
Number, according to each user channel quality measured in step 2, to the serialization of K user into rearrangement so that serialization is expired after resetting
Foot | h1|2≤|h2|2≤…≤|hK|2。
Step 4：According to the position distribution and channel quality condition of validated user, configure each validated user signal power and
Kernel man made noise's coefficient.With LmaxRepresent that user institute farthest apart from transmitting terminal in user's set that transmitting terminal is serviced is right
The distance answered, i.e.,With D0Represent the maximum service radius that server-side is capable of providing, RkRepresent k-th of user
The data rate that can be obtained,Represent the targeted rate (it is expected the data rate reached) of k-th of user, RkIt is represented by
Wherein, P represents transimission power, ck>=0 represents power partition coefficient, ckConfiguration meet：c1≥c2≥…≥cK、And c1+c2+…+cK=1- η, whereinFor kernel artifact power's distribution coefficient.
Step 5：NOMA safe transmissions are carried out according to the obtained configuration coefficients of step 4, when the obtained configuration system of step 4
When array is not unique, take η values maximum one group is used as power partition coefficient used in transmission.
Process, which is further explained explanation, to be realized to the present invention below by concrete example：
For α=3, P=10W, a D0=100m, σ2=10-7, include 2 validated users 1 listener-in and listener-in's channel quality (| he|2=8.4998 × 10-6) logical better than 2 validated users
Believe scene, NOMA safe transmission method of physical layer using the present invention comprises the following steps that：
S201 measures the distance between each validated user and transmitting terminal, and transmitting terminal while the number of users of service are represented with K, this
When K=2, with ukRepresent k-th of user (k ∈ { 1,2 }) in user's set that transmitting terminal is serviced, measurement validated user ukWith hair
Penetrate the distance between end Lk, measure L1=80m, L2=50m.
S202 measures 2 channels between validated user and transmitting terminal respectively, with hkRepresent ukLetter between transmitting terminal
Road, measures | h1|2=1.9531 × 10-6、|h2|2=7.9999 × 10-6。
S203 resequences validated user according to channel quality, by correspondence | hi|2It is worth minimum user uiAgain mark
It is denoted as user u1, then another user is u2, meet after serialization rearrangement | h1|2≤|h2|2, due to | h1|2=1.9531 × 10-6<|
h2|2=7.9999 × 10-6, thus it is still identical with situation before after serialization rearrangement.
S204 configures the power and zero of each validated user signal according to the position distribution and channel quality condition of validated user
Space man made noise's coefficient.With LmaxIn user's set that expression transmitting terminal is serviced corresponding to the user farthest apart from transmitting terminal
Distance, i.e. Lmax=80m, with RkRepresent the data rate that k-th of user can obtain, R1It is represented by
R2It is represented by
, wherein, ckConfiguration meet：c1≥c2、And c1+c2+…+cK=1- η, whereinIt is zero empty
Between artifact power's distribution coefficient.η can be decomposed into η=η0+η1, whereinη1≥0.C can be solved1=
0.7570、c2=0.0024, η0=0.24, η1=6.4 × 10-4, R at this time1=6.6699bits/s/Hz, R2=
1.5411bits/s/Hz。
And user u is received at listener-in1Data rate Re,1It is represented by
User u is received at listener-in2Data rate Re,2It is represented by
At this time, user u1Obtainable secure data speed is RS,1=R1-Re,1=4.6344bits/s/Hz, user u1Can
The secure data speed of acquisition is RS,2=R2-Re,2=1.527bits/s/Hz.And in the communication scenes, if not using zero sky
Between man made noise's technology, since the channel quality of listener-in is better than all validated users, according to Wyner theorems, system at this time
Safe capacity is 0, and secure data speed is 0 obtained by each user.
With reference to more than for example, effectiveness of the invention can be verified further, it is potential according to suffered by validated user
Security threat degree, by reasonable disposition man made noise, strengthening system is better than validated user channel quality in tapping channel quality
When for passive wiretapping resilience, lift the safety of physical layer performances that are wirelessly transferred of NOMA in heterogeneous network, enhancing NOMA systems
System resists the ability of potential silent eavesdropping, especially in the case where tapping channel quality is better than validated user channel quality.
Above content is that a further detailed description of the present invention in conjunction with specific preferred embodiments, it is impossible to is assert
The embodiment of the present invention is only limitted to this, for general technical staff of the technical field of the invention, is not taking off
On the premise of from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention by institute
Claims of submission determine scope of patent protection.The foregoing description of the disclosed embodiments, makes this area professional technique
Personnel can realize or using the application.A variety of modifications to these embodiments will be for those skilled in the art
It will be apparent that the general principles defined herein can be in the case where not departing from spirit herein or scope, at it
Realized in its embodiment.Therefore, the application is not intended to be limited to the embodiments shown herein, and is to fit to and this paper
The consistent most wide scope of disclosed principle and features of novelty.
Claims (9)
1. a kind of heterogeneous network NOMA safe transmission method of physical layer, it is characterised in that for non-orthogonal multiple NOMA technologies
The each validated user of heterogeneous network, the signal power coefficient of each validated user is serviced by configuring NOMA, and according to validated user
Position distribution configures kernel man made noise's distribution coefficient, is distributed according to the signal power coefficient of configuration and kernel man made noise
Coefficient carries out the peace transmission of heterogeneous network NOMA physical layers.
2. heterogeneous network NOMA safe transmission method of physical layer according to claim 1, it is characterised in that specifically comprising as follows
Content：
A all validated users serviced at the same time using NOMA technologies in heterogeneous network transmitting terminal) are directed to, measure each validated user and hair
The distance between end is penetrated, obtains the position distribution of each validated user；
B) according to the distance between each validated user and transmitting terminal, the channel quality between each validated user and transmitting terminal is measured；
C) resequenced according to channel quality to validated user；
D) according to the position distribution and channel quality of validated user, the distribution coefficient group of each validated user signal, the distribution are configured
Coefficient sets include at least signal power distribution coefficient and kernel man made noise's distribution coefficient；
E heterogeneous network NOMA safe transmissions) are carried out according to distribution coefficient group.
3. heterogeneous network NOMA safe transmission method of physical layer according to claim 2, it is characterised in that A) in each conjunction of measurement
The distance between method user and transmitting terminal, through but not limited to GPS rangings, Big Dipper ranging, base station ranging and mixed distance measuring method
Carry out range measurement.
4. heterogeneous network NOMA safe transmission method of physical layer according to claim 2, it is characterised in that B) according to each conjunction
The distance between method user and transmitting terminal, and fading channel gain and path loss index, obtain each validated user and transmitting terminal
Between channel quality.
5. heterogeneous network NOMA safe transmission method of physical layer according to claim 4, it is characterised in that B) in each legal use
Channel quality between family and transmitting terminal is expressed asWherein,Represent k-th of validated user ukWith transmitting terminal it
Between multipath fading channel gain, hkRepresent ukChannel quality between transmitting terminal, α are path loss index, LkTo be legal
User ukThe distance between transmitting terminal.
6. heterogeneous network NOMA safe transmission method of physical layer according to claim 5, it is characterised in that C) according to channel
Quality resequences validated user so that channel quality meets after sequence | h1|2≤|h2|2≤…≤|hK|2, wherein, K
Represent all validated users sum that transmitting terminal services at the same time.
7. heterogeneous network NOMA safe transmission method of physical layer according to claim 2, it is characterised in that D) in, according to conjunction
The data rate and targeted rate and signal transmission power that method user obtains, to each validated user signal power distribution coefficient and zero
Space artifact power's distribution coefficient is configured.
8. heterogeneous network NOMA safe transmission method of physical layer according to claim 7, it is characterised in that D) in validated user
The data rate R of acquisitionkIt is expressed as：Wherein, P represents signal transmission power, ck>=0 table
Show signal power distribution coefficient, ckConfiguration meet：c1≥c2≥…≥cK、And c1+c2+…+cK=1- η,For kernel artifact power's distribution coefficient,Represent the targeted rate of k-th of user, K represents that transmitting terminal is same
When service all validated users sum, LmaxRepresent use farthest apart from transmitting terminal in the validated user that transmitting terminal services at the same time
Distance corresponding to family, D0Represent the maximum service radius that server-side provides, σ2Represent noise power.
9. heterogeneous network NOMA safe transmission method of physical layer according to claim 2, it is characterised in that E) according to configuration
When coefficient sets carry out the transmission of NOMA safety of physical layer, if distribution coefficient group has not unique, kernel artifact power is taken
Signal power distribution coefficient in one group of distribution coefficient maximum is as signal power distribution coefficient used in transmission.
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| CN109088682A (en) * | 2018-07-05 | 2018-12-25 | 安徽师范大学 | Safe rate and maximization approach under a kind of MISO network based on NOMA |
| CN109640320A (en) * | 2018-12-07 | 2019-04-16 | 南京邮电大学 | A kind of safe discharging method of the mobile edge calculations system-computed task based on mixing NOMA |
| CN109861785A (en) * | 2018-12-11 | 2019-06-07 | 广东工业大学 | A kind of method and device of the unmanned plane collaboration communication based on safety of physical layer |
| CN109890031A (en) * | 2019-03-11 | 2019-06-14 | 重庆邮电大学 | A kind of more relaying non-orthogonal multiple system safe transmission schemes based on man made noise |
| KR102235149B1 (en) * | 2019-11-27 | 2021-04-02 | 한국과학기술원 | Decoding order selecting method for improvement the fairness of secure communication in uplink noma network with cooperative jamming, and the system thereof |
| CN111148096A (en) * | 2019-12-03 | 2020-05-12 | 西安电子科技大学 | Physical layer safety optimization power distribution method in 5G NOMA system |
| CN111148096B (en) * | 2019-12-03 | 2022-03-25 | 西安电子科技大学 | Physical layer safety optimization power distribution method in 5G NOMA system |
| CN111148101A (en) * | 2019-12-19 | 2020-05-12 | 北京邮电大学 | Physical layer group authentication method |
| CN111148101B (en) * | 2019-12-19 | 2021-05-25 | 北京邮电大学 | Physical layer group authentication method |
| CN111148203A (en) * | 2019-12-20 | 2020-05-12 | 中国人民解放军战略支援部队信息工程大学 | Artificial noise assisted active eavesdropper resistant robust secure transmission method in heterogeneous network |
| CN111148203B (en) * | 2019-12-20 | 2023-02-14 | 中国人民解放军战略支援部队信息工程大学 | Artificial noise assisted active eavesdropper resistant robust secure transmission method in heterogeneous network |
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