CN108366026A - The safe transmission method of physical layer of man made noise based on constellation rotation - Google Patents
The safe transmission method of physical layer of man made noise based on constellation rotation Download PDFInfo
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- CN108366026A CN108366026A CN201810218103.3A CN201810218103A CN108366026A CN 108366026 A CN108366026 A CN 108366026A CN 201810218103 A CN201810218103 A CN 201810218103A CN 108366026 A CN108366026 A CN 108366026A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
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- 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
- H04B7/0617—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 for beam forming
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- 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
- H04B7/0619—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 using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
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Abstract
The present invention proposes a kind of man made noise's safe transmission method based on constellation rotation, the small technical problem of the secrecy capacity for solving wireless communication system existing in the prior art.Realize that step is：Source node S obtains it and arrives the channel state information of destination node D；It generates and sends signal and beam forming is carried out to it；It generates man made noise and the constellation rotation of special angle and beam forming is carried out to it；Transmission signal after beam forming and the man made noise after constellation rotation are superimposed as composite signal and sent by source node S；Destination node D receives the composite signal by channel, and acquisition demodulated signal is demodulated to it.The present invention can significantly improve the snr of received signal of transmitting terminal by carrying out constellation rotation to man made noise, and the signal-to-noise ratio at illegal wiretapping end is maintained into low value level, so as to improve the secrecy capacity of wireless communication system, the security performance of wireless communication system is effectively improved.
Description
Technical field
The invention belongs to fields of communication technology, are related to a kind of physical layer transmission method of man made noise, and in particular to a kind of
Man made noise's safe transmission method of physical layer based on constellation rotation can be used for the guarantor that transmitting terminal uses digital phase modulation technology
Close communication system.
Background technology
It is unstable due to the opening of transmission medium in wireless communication system, the mobility of wireless terminal and network structure
Property, the reliability and security facing of signal transmission acid test.Studies have shown that in addition to traditional higher-layer encryption mode,
Safe transmission problem can also be solved by safety of physical layer technology.As upper layer encryption method a kind of supplement or replace skill
Art, safety of physical layer technology are to ensure safety using features such as multipath, reciprocity, the space uniqueness of wireless channel in bottom
Communication, can effectively improve the security performance of wireless communication system.
U.S. mathematician, Shannon Shannon propose perfect safety (perfect secrecy) theory,
Theoretical foundation has been established in research for safety of physical layer communication.Hereafter, Wyner proposes tapping channel model from information theory view,
Two legal users carry out the communication of confidential information by main channel, and listener-in eavesdrops validated user by degenerate channel transmits
Confidential information, and prove that validated user end certainly exists certain scrambling coding, using the coding transmission confidential information, can make
Listener-in can not obtain any information content about transmission message, to realize complete, absolute secrecy.In safety of physical layer
In with the coding mode transmit confidential information capacity, be defined as secrecy capacity, i.e. transmitting terminal being capable of transmitting confidential information
To legitimate receipt end without the maximum rate decoded by illegal wiretapping end.However if eavesdropping side is gathered around, there are one be better than main channel
Tapping channel, then secrecy capacity will become zero, also can not just ensure secure communication.In order to deteriorate tapping channel, 2005
R.Negi and S.Goel proposes the method that transmitting terminal sends man made noise on the kernel of main channel, can not influence completely
Validated user reduces the signal-to-noise ratio of tapping channel in the case of communicating, to improve the secrecy capacity of communication system, to reach peace
The purpose of full communication.Studies have shown that no matter eavesdropping user in any position, it can ensure that minimum safety passes using man made noise
Defeated rate.
In the existing scheme using man made noise, generally require that man made noise is placed on the kernel of main channel,
Legal receiving terminal is not interfered, that is, the artifact power at legitimate receipt end is 0, corresponding man made noise is also
Will not be received to the signal of legal receiving terminal has any help.In order to overcome drawbacks described above, good 2016 of Levy exists《Electronic information
Journal》On delivered " using man made noise improve legitimate receiver performance safety of physical layer scheme " paper, text in propose
A kind of safe transmission method of adaptive Human disturbance, transmitting terminal are judged according to legitimate channel status information and man made noise
Whether the man made noise that legitimate receipt end will be reached is beneficial to legal receiving terminal demodulated signal, if beneficial, using omnidirectional
Man made noise's beam forming makes legitimate receipt end that can also receive man made noise, improves demodulation performance；If harmful, by people
Work noise is placed on legitimate channel kernel, to avoid generating interference to legitimate receiver.This method carries to a certain extent
The high signal-to-noise ratio at legitimate receipt end, and the signal-to-noise ratio at illegal wiretapping end is maintained into low value level simultaneously, improve communication system
The secrecy capacity of system, although the process employs adaptive Human disturbance method, man made noise is not still always to legal
Receiving terminal demodulated signal is beneficial, and there is also secrecy capacities to promote limited, the problem of security performance deficiency in this way for institute.
Invention content
It is an object of the invention to overcome the problems of the above-mentioned prior art, it is proposed that a kind of people based on constellation rotation
Work noise safe transmission method, the small technology of secrecy capacity for solving wireless communication system existing in the prior art are asked
Topic.
The present invention technical thought be：Source node S obtains it and arrives the channel state information of destination node D, generates and sends letter
Number and beam forming is carried out to it, then generate man made noise and the constellation rotation of special angle and beam forming carried out to it, so
The transmission signal after beam forming and the man made noise after constellation rotation are superimposed as composite signal and sent out by source node S afterwards
It send, last destination node D receives the composite signal by channel, and acquisition demodulated signal is demodulated to it.
According to above-mentioned technical thought, realizes the technical solution that the object of the invention is taken, include the following steps：
(1) destination node D sends training symbol sequence to source node S；
(2) source node S obtains channel state information h：
Source node S estimates the state of source node S to destination node D channels according to the training symbol sequence of reception,
Obtain channel state information h；
(3) source node S obtains the transmission signal w after beam forming1x：
(3a) source node S carries out digital phase modulation to the symbol to be sent of generation, obtains sending signal x；
(3b) source node S will send signal x and be directed at destination node D, obtain the beam forming vector w for sending signal x1, and
Pass through beam forming vector w1Beam forming is carried out to sending signal x, to realize the maximization for receiving power to destination node D,
Obtain the transmission signal w after beam forming1X, wherein w1=hH/ | | h | |, hHIndicate the conjugate transposition of h, | | h | | indicate the 2- of h
Norm, hH/ | | h | | indicate hHWith | | h | | ratio；
(4) source node S obtains man made noise's signal w after constellation rotation and beam forming2z·exp(jθ)：
(4a) source node S generates N-dimensional man made noise's vector signal z, z=[z at random1,z2,...,zi,...,zN]T, wherein
ziIndicate i-th of vector element of man made noise's vector signal z, zi~CN (0,1), i=1,2 ..., N, CN (0,1) indicate to obey
Mean value is the multiple Gauss distribution that 0 variance is 1, the dimension number N of man made noise's vector signal z and the transmitting antenna number of source node S
Mesh is equal；
(4b) source node S carries out constellation rotation to man made noise's signal z：
Source node S carries out the phase of man made noise's vector signal z on two dimensional surface rectangular coordinate system xoy around origin | θ
| the rotation of angle rotates clockwise man made noise's signal z as θ ＞ 0, as θ ＜ 0, to man made noise's signal z into
Row is counterclockwise to be rotated, and man made noise's signal zexp (j θ) after constellation rotation is obtained, wherein θ is to send signal x and pass through standard
The phase difference of man made noise's signal hz of static rayleigh fading channel, θ=arg (x)-arg (hz), | θ | indicate the absolute value of θ, j
Indicate that imaginary unit, exp (j θ) indicate that using natural logrithm e be bottom using j θ as the index of power, zexp (j θ) indicates z and exp (j
Product θ), arg (x) indicate the phase of x；
(4c) source node S carries out beam forming to the man made noise zexp (j θ) after constellation rotation：
Man made noise zexp (j θ) after constellation rotation is isotropically aligned by source node S in three-dimensional space
Receiving node obtains the beamforming matrix w of man made noise z2, and pass through beamforming matrix w2To artificial after constellation rotation
Noise signal zexp (j θ) carries out beam forming, obtains man made noise's signal w after constellation rotation and beam forming2z·exp
(j θ), wherein w2=IN, INFor the unit matrix of N × N ranks；
(5) source node S obtains composite signal xtAnd it sends：
Source node S is to the transmission signal w after beam forming1X and man made noise's signal w2Zexp (j θ) is overlapped, and is obtained
To composite signal xt, and destination node D is sent to by quasistatic Rayleigh fading channel；
(6) destination node D obtains demodulated signal x：
Destination node D is to the composite signal x by quasistatic Rayleigh fading channeltIt is demodulated, obtains demodulated signal x.
Compared with prior art, the present invention haing the following advantages：
The present invention carries out constellation rotation when man made noise pre-processes, to man made noise, improves the letter at legitimate receipt end
Make an uproar than and by illegal wiretapping end signal-to-noise ratio maintain low value level, expand the signal-to-noise ratio at legitimate receipt end and illegal wiretapping end
Difference avoids the prior art pre- using adaptive wave beam shaping to improve the secrecy capacity of wireless communication system
Legitimate receipt end signal-to-noise ratio promotes limited, the small problem of secrecy capacity when handling man made noise.Simulation result shows phase of the present invention
Than the secrecy capacity that can significantly improve wireless communication system in the prior art, the security performance of communication system is improved.
Description of the drawings
Fig. 1 is the structural schematic diagram that the applicable MISOSE of the present invention eavesdrops model；
Fig. 2 is the implementation process block diagram of the present invention；
Fig. 3 is the secrecy capacity simulation comparison result figure of the present invention and the prior art.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments, invention is further described in detail.
Referring to Fig.1, the MISOSE that the present invention is applicable in eavesdrops model, includes the source node S equipped with N root antennas, and 1 day is housed
Line destination node D and eavesdropping node E equipped with 1 antenna.Source node S to the channel of destination node D, referred to as legitimate channel,
Corresponding channel state information is denoted as h, source node S to the channel of eavesdropping node E, referred to as tapping channel, corresponding channel shape
State information is denoted as g.Two kinds of channel fadings are quasi-static Rayleigh fading, i.e., channel coefficients are not in the transmission time of a code word
Become, the channel coefficients between different code words are then mutual indepedent.Source node S can obtain the channel shape of legitimate channel by channel estimation
State information, and it is passive wiretapping to eavesdrop node E, so the channel state information of the unknown tapping channel of source node S.Conjunction in Fig. 1
Method channel is h=[h1,h2,…,hi,…,hN], tapping channel is g=[g1,g2,…,gi,…,gN], hiAnd giSource is indicated respectively
I-th transmission antenna of node S is to destination node D and eavesdrops the channel fading coefficient between node E, i=1,2 ..., N, each channel
Between be independent identically distributed multiple Gauss stochastic variable, obey CN (0,1) be distributed.
With reference to Fig. 2, a kind of safe transmission method of physical layer of the man made noise based on constellation rotation includes the following steps：
Step 1) destination node D sends training symbol sequence to source node S.
Step 2) source node S obtains channel state information h：
Source node S estimates the state of source node S to destination node D channels according to the training symbol sequence of reception,
Obtain channel state information h.
Here communication system is become slowly using time division duplex (TDD) and channel, according to principle of reciprocity, it may be considered that source is saved
Transceiver channel between point S and destination node D is identical, so source node S can be right according to the training symbol sequence of reception
The channel status of source node S to destination node D are estimated, channel state information h is obtained.
Step 3) source node S obtains the transmission signal w after beam forming1x：
Step 3a) source node S carries out digital phase modulation to the symbol to be sent of generation, it obtains sending signal x；
Using the Ditital modulation method based on phase-modulation such as BPSK or QPSK, the effective information of signal is integrally incorporated in
In the phase for sending signal, it is scalar to send signal x here, indicates the transmission signal to be transmitted in a transmission time slot,
With unit power, i.e. E | x |2}=1；
Step 3b) source node S will send signal x and be directed at destination node D, obtain the beam forming vector w for sending signal x1,
According to beam forming vector w1, will send in signal x weight assignments to each antenna of source node S, believed sending with realizing
The beam forming of number x, and pass through beam forming vector w1Beam forming is carried out to sending signal x, destination node D is connect with realizing
The maximization for receiving power, obtains the transmission signal w after beam forming1X, wherein w1=hH/ | | h | |, hHIndicate that the conjugation of h turns
It sets, | | h | | indicate the 2- norms of h, hH/ | | h indicates hHWith | | h | | ratio；
Source node S uses beam forming vector w1, w1=hH/ | | h | |, the signal that source node S transmitting antenna is sent out at this time
The meeting in-phase stacking at destination node D can make the power that destination node D receives signal maximum.
Step 4) source node S obtains man made noise's signal w after constellation rotation and beam forming2z·exp(jθ)：
Step 4a) source node S generates N-dimensional man made noise's vector signal z, z=[z at random1,z2,...,zi,...,zN]T,
In, ziIndicate i-th of vector element of man made noise's vector signal z, zi~CN (0,1), i=1,2 ..., N, CN (0,1) are indicated
It is the multiple Gauss distribution that 0 variance is 1, the dimension number N of man made noise's vector signal z and the transmitting day of source node S to obey mean value
Line number mesh is equal；
Step 4b) source node S carries out constellation rotation to man made noise's signal z：
Source node S carries out the phase of man made noise's vector signal z on two dimensional surface rectangular coordinate system xoy around origin | θ
| the rotation of angle rotates clockwise man made noise's signal z as θ ＞ 0, as θ ＜ 0, to man made noise's signal z into
Row is counterclockwise to be rotated, and man made noise's signal zexp (j θ) after constellation rotation is obtained, wherein θ is to send signal x and pass through standard
The phase difference of man made noise's signal hz of static rayleigh fading channel, θ=arg (x)-arg (hz), | θ | indicate the absolute value of θ, j
Indicate that imaginary unit, exp (j θ) indicate that using natural logrithm e be bottom using j θ as the index of power, zexp (j θ) indicates z and exp (j
Product θ), arg (x) indicate the phase of x；
Because sending signal x to be modulated with digital phase modulation method, and because send the beam forming vector of signal x
w1=hH/ | | h | |, so sending signal w after beam forming1X passes through the signal hw after legitimate channel h1The phase of x be in fact with
It is identical to send signal x, as long as so making it after legitimate channel h the phase place certain angle of man made noise z
Phase is also identical as signal x is sent, and the man made noise hz for reaching destination node D at this time is exactly to be beneficial to destination node D demodulation letters
Number, and the angle of this rotation is exactly the absolute value by the man made noise hz and the phase difference θ for sending signal x of legitimate channel h |
θ |, direction of rotation is positive and negative depending on θ's, and the man made noise after constellation rotation is exactly zexp (j θ)；
As described above, man made noise signal hzexp (j after the constellation rotation received by destination node D at this time
It is θ) identical with transmission signal phase x, so the man made noise's signal hzexp (j θ) received at this time in destination node D
Similarly it is and sends signal phase x to be identical with the composite signal phase for sending signal x, so here can be directly by purpose
The man made noise that node D is received regards as sending signal section, thus the man made noise zexp Jing Guo constellation rotation (j θ)
Always it is beneficial to destination node D demodulated signals, can effectively improve the signal-to-noise ratio that destination node D receives signal；
Step 4c) source node S to after constellation rotation man made noise zexp (j θ) carry out beam forming：
Man made noise zexp (j θ) after constellation rotation is isotropically aligned by source node S in three-dimensional space
Receiving node obtains the beamforming matrix w of man made noise z2, and pass through beamforming matrix w2To artificial after constellation rotation
Noise signal zexp (j θ) carries out beam forming, obtains man made noise's signal w after constellation rotation and beam forming2z·exp
(j θ), wherein w2=IN, INFor the unit matrix of N × N ranks；
Here the man made noise zexp (j θ) after constellation rotation is shaped using omni-beam, can makes man made noise
Isotropically emit, so that destination node D receives man made noise, such destination node D could be from man made noise
Benefit, this improves the signal-to-noise ratio of the reception signal of destination node D, and at the same time eavesdropping node E can similarly receive manually
Noise, and for eavesdropping node E, since the constellation rotation of man made noise is only that its is right for variation in man made noise's phase
Eavesdropping node E demodulated signals do not generate any beneficial effect, so man made noise still can effectively prevent eavesdropping node E and steal letter
Number, the snr of received signal of eavesdropping node E is very low like the prior art, is defined according to secrecy capacity, man made noise passes through
The secrecy capacity of MISOSE eavesdropping models can be improved after constellation rotation.
Step 5) source node S obtains composite signal xtAnd it sends：
Source node S is to the transmission signal w after beam forming1X and man made noise's signal w2Zexp (j θ) is overlapped, and is obtained
To composite signal xt, and destination node D is sent to by quasistatic Rayleigh fading channel；
Here composite signal xtExpression formula be
Wherein, psIt is the power for sending signal x, pzIt is the power for sending man made noise z.
Step 6) destination node D obtains demodulated signal x：
Destination node D is to the composite signal x by quasistatic Rayleigh fading channeltIt is demodulated, obtains demodulated signal x,
Implementation step is：
Step 6a) destination node D is by the composite signal x by quasistatic Rayleigh fading channel of receptiontIt is denoted as purpose section
The reception signal y of point Dd：
yd=hxt+nd
Wherein, h is channel state information of the source node S to destination node D, ndFor the multiple additive white gaussian of purpose node D
Noise, Indicate that it is that 0 variance is to obey mean valueMultiple Gauss distribution；
According to composite signalSend the beam forming arrow of signal x
Measure w1=hH/ | | h | | and the beamforming matrix w of man made noise2=IN, the reception signal y of destination node DdIt can be expressed as：
Step 6b) destination node D uses maximum Likelihood, docking collection of letters ydDemodulation coding is carried out, is sent out
The estimated value for the number of delivering lettersWherein, the expression formula of maximum Likelihood is：
Wherein, x is to send signal.
Below in conjunction with emulation experiment, the technique effect of the present invention is illustrated：
1. simulated conditions and content：
It is [email protected] of Intel (R) Core (TM) i3CPU that the emulation experiment of the present invention, which is in operating system, 64
The hardware platform of Windows operating system carries out, and simulation software uses MATLAB.The emulation of the present invention and the prior art is using figure
MISOSE in 1 eavesdrops model, and the transmitting antenna number of source node S is 4, the number of antennas of destination node D and eavesdropping node E
It is 1.The dimension number N for man made noise's vector signal that source node S generates in emulation is 4, the modulation methods that source node S uses
Formula is QPSK, and destination node D uses maximum likelihood algorithm into row decoding.All channels in emulation experiment are quasi-static
Flat Rayleigh fading channel sends the power p of signals=0.5, send the power p of man made noisez=0.5.
Emulation content is to eavesdrop the secrecy capacity progress simulation comparison of model to MISOSE using the present invention and the prior art,
As a result such as Fig. 3.
2. analysis of simulation result：
With reference to Fig. 3, which is the secrecy capacity simulation comparison result figure of the present invention and the prior art, and abscissa indicates source
The signal-to-noise ratio (SNR) for the composite signal that node is sent, unit are dB, and ordinate indicates the secrecy capacity of MISOSE eavesdropping models
(CS), unit is bit/symbol.The curve identified with triangle indicates to eavesdrop using the obtained MISOSE of the method for the present invention
The secrecy capacity of model indicates the safe transmission using the i.e. adaptive Human disturbance of art methods with the curve of circular indicia
The secrecy capacity of the obtained MISOSE eavesdroppings model of method.
In Fig. 3 the present invention and prior art secrecy capacity in signal-to-noise ratio 0dB be respectively 0.55bit/symbol and
0.52bit/symbol, in signal-to-noise ratio 10dB, secrecy capacity is respectively 0.75bit/symbol and 0.70bit/symbol, sheet
The secrecy capacity of invention and the prior art is all improved with the increase of Signal-to-Noise therewith.Scan full figure it is found that compared to
The prior art, secrecy capacity of the invention have significant raising, to improve the security performance of communication system.
Unspecified part of the present invention belongs to common sense well known to those skilled in the art.
Above description is only example of the present invention, it is clear that for those skilled in the art, is being understood
After the content of present invention and principle, all it may be carried out in form and details without departing substantially from the principle of the invention, structure
Various modifications and variations, but these modifications and variations based on inventive concept are still in the claims of the present invention
Within.
Claims (4)
1. a kind of safe transmission method of physical layer of the man made noise based on constellation rotation, which is characterized in that include the following steps：
(1) destination node D sends training symbol sequence to source node S；
(2) source node S obtains channel state information h：
Source node S is estimated the state of source node S to destination node D channels, is obtained according to the training symbol sequence of reception
Channel state information h；
(3) source node S obtains the transmission signal w after beam forming1x：
(3a) source node S carries out digital phase modulation to the symbol to be sent of generation, obtains sending signal x；
(3b) source node S will send signal x and be directed at destination node D, obtain the beam forming vector w for sending signal x1, and pass through wave
Beam shaping vector w1Beam forming is carried out to sending signal x, to realize the maximization for receiving power to destination node D, obtains wave
Transmission signal w after beam shaping1X, wherein w1=hH/ | | h | |, hHIndicate the conjugate transposition of h, | | h | | indicate the 2- norms of h,
hH/ | | h | | indicate hHWith | | h | | ratio；
(4) source node S obtains man made noise's signal w after constellation rotation and beam forming2z·exp(jθ)：
(4a) source node S generates N-dimensional man made noise's vector signal z, z=[z at random1,z2,...,zi,...,zN]T, wherein ziTable
I-th of vector element of work of leting others have a look at noise vector signal z, zi~CN (0,1), i=1,2 ..., N, CN (0,1) indicate to obey equal
Value is the multiple Gauss distribution that 0 variance is 1, the dimension number N of man made noise's vector signal z and the transmitting antenna number of source node S
It is equal；
(4b) source node S carries out constellation rotation to man made noise's signal z：
Source node S carries out the phase of man made noise's vector signal z on two dimensional surface rectangular coordinate system xoy around origin | θ | angle
The rotation of degree rotates clockwise man made noise's signal z as θ ＞ 0, as θ ＜ 0, is carried out to man made noise's signal z
Counterclockwise rotation, obtain man made noise's signal zexp (j θ) after constellation rotation, wherein θ be send signal x with by standard it is quiet
The phase difference of man made noise's signal hz of state rayleigh fading channel, θ=arg (x)-arg (hz), | θ | indicate the absolute value of θ, j tables
Show imaginary unit, exp (j θ) indicates that using natural logrithm e be bottom using j θ as the index of power, and zexp (j θ) indicates z and exp (j θ)
Product, arg (x) indicate x phase；
(4c) source node S carries out beam forming to the man made noise zexp (j θ) after constellation rotation：
By the man made noise zexp (j θ) after constellation rotation, isotropically alignment receives source node S in three-dimensional space
Node obtains the beamforming matrix w of man made noise z2, and pass through beamforming matrix w2To the man made noise after constellation rotation
Signal zexp (j θ) carries out beam forming, obtains man made noise's signal w after constellation rotation and beam forming2z·exp(j
θ), wherein w2=IN, INFor the unit matrix of N × N ranks；
(5) source node S obtains composite signal xtAnd it sends：
Source node S is to the transmission signal w after beam forming1X and man made noise's signal w2Zexp (j θ) is overlapped, and is answered
Close signal xt, and destination node D is sent to by quasistatic Rayleigh fading channel；
(6) destination node D obtains demodulated signal x：
Destination node D is to the composite signal x by quasistatic Rayleigh fading channeltIt is demodulated, obtains demodulated signal x.
2. the safe transmission method of physical layer of the man made noise according to claim 1 based on constellation rotation, feature exist
In, described in step (3b) to send signal x carry out beam forming, realize step be：
Source node S is according to the beam forming vector w for sending signal x1, signal x weight assignments will be sent to each day of source node S
On line, to realize the beam forming to sending signal x, the transmission signal w after beam forming is obtained1x。
3. the safe transmission method of physical layer of the man made noise according to claim 1 based on constellation rotation, feature exist
In the composite signal x described in step (5)t, expression formula is：
Wherein, psIt is the power for sending signal x, pzIt is the power for sending man made noise z, w1It is the beam forming arrow for sending signal x
Amount, w2It is the beamforming matrix for sending man made noise z, θ is to send signal x and pass through the artificial of quasistatic Rayleigh fading channel
The phase difference of noise signal hz, θ=arg (x)-arg (hz), N are the dimensions for man made noise's vector signal z that source node S generates
Number.
4. the safe transmission method of physical layer of the man made noise according to claim 1 based on constellation rotation, feature exist
In the destination node D described in step (6) is to the composite signal x by quasistatic Rayleigh fading channeltIt is demodulated, is realized
Step is：
(6a) destination node D is by the composite signal x by quasistatic Rayleigh fading channel of receptiontIt is denoted as the reception of destination node D
Signal yd：
yd=hxt+nd
Wherein, h is channel state information of the source node S to destination node D, ndFor the multiple additive white Gaussian noise of purpose node D, Indicate that it is that 0 variance is to obey mean valueMultiple Gauss distribution；
(6b) destination node D uses maximum Likelihood, docking collection of letters ydDemodulation coding is carried out, obtains sending signal
Estimated valueWherein, the expression formula of maximum Likelihood is：
Wherein, x is to send signal.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108989816A (en) * | 2018-09-03 | 2018-12-11 | 广州海格通信集团股份有限公司 | A kind of coded channel information hidden method based on wavelet transformation |
| CN110062384A (en) * | 2019-04-28 | 2019-07-26 | 西安交通大学 | A kind of wireless monitoring method based on signal rotation |
| CN111614387A (en) * | 2020-05-12 | 2020-09-01 | 西安交通大学 | Safe transmission method in large-scale antenna system |
| CN111683033A (en) * | 2020-05-27 | 2020-09-18 | 重庆邮电大学 | Encryption and transmission method based on constellation rotation in TR _ OFDM system |
| CN111935711A (en) * | 2020-06-04 | 2020-11-13 | 中国人民解放军空军工程大学 | Wireless communication data-carrying AN-assisted secure transmission method and application |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101437296B1 (en) * | 2013-12-04 | 2014-09-02 | 한국과학기술원 | Message Security method in physical layer and apparatus for transmitting secure message using the same |
| CN105163310A (en) * | 2015-09-30 | 2015-12-16 | 西安交通大学 | Constellation rotation assisted wireless physical layer secure transmission method in two-way relay system |
| CN106357373A (en) * | 2016-08-30 | 2017-01-25 | 湖南国天电子科技有限公司 | Security transmission method, based on man made noise, of spatially modulated physical layer |
| CN106789049A (en) * | 2017-03-24 | 2017-05-31 | 中国人民解放军国防科学技术大学 | A kind of three-dimensional constellation rotation encryption method based on radio channel characteristic |
| EP3211812A4 (en) * | 2014-11-25 | 2017-08-30 | Huawei Technologies Co., Ltd. | Method for transmitting data, base station and user equipment |
-
2018
- 2018-03-16 CN CN201810218103.3A patent/CN108366026B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101437296B1 (en) * | 2013-12-04 | 2014-09-02 | 한국과학기술원 | Message Security method in physical layer and apparatus for transmitting secure message using the same |
| EP3211812A4 (en) * | 2014-11-25 | 2017-08-30 | Huawei Technologies Co., Ltd. | Method for transmitting data, base station and user equipment |
| CN105163310A (en) * | 2015-09-30 | 2015-12-16 | 西安交通大学 | Constellation rotation assisted wireless physical layer secure transmission method in two-way relay system |
| CN106357373A (en) * | 2016-08-30 | 2017-01-25 | 湖南国天电子科技有限公司 | Security transmission method, based on man made noise, of spatially modulated physical layer |
| CN106789049A (en) * | 2017-03-24 | 2017-05-31 | 中国人民解放军国防科学技术大学 | A kind of three-dimensional constellation rotation encryption method based on radio channel characteristic |
Non-Patent Citations (3)
| Title |
|---|
| RUIFENG MA 等: "Secure Communication in TDS-OFDM System Using Constellation Rotation and Noise Insertion", 《IEEE TRANSACTIONS ON CONSUMER ELECTRONICS》 * |
| 刘俊杰: "联合调制加密与人工噪声加扰的MIMO-OFDM安全传输策略设计", 《中国优秀硕士学位论文全文数据库》 * |
| 雷维嘉 等: "利用人工噪声提高合法接收者性能的物理层安全方案", 《电子与信息学报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108989816A (en) * | 2018-09-03 | 2018-12-11 | 广州海格通信集团股份有限公司 | A kind of coded channel information hidden method based on wavelet transformation |
| CN108989816B (en) * | 2018-09-03 | 2021-05-14 | 广州海格通信集团股份有限公司 | Coding channel information hiding method based on wavelet transformation |
| CN110062384A (en) * | 2019-04-28 | 2019-07-26 | 西安交通大学 | A kind of wireless monitoring method based on signal rotation |
| CN111614387A (en) * | 2020-05-12 | 2020-09-01 | 西安交通大学 | Safe transmission method in large-scale antenna system |
| CN111614387B (en) * | 2020-05-12 | 2021-06-22 | 西安交通大学 | Safe transmission method in large-scale antenna system |
| CN111683033A (en) * | 2020-05-27 | 2020-09-18 | 重庆邮电大学 | Encryption and transmission method based on constellation rotation in TR _ OFDM system |
| CN111683033B (en) * | 2020-05-27 | 2022-04-05 | 重庆邮电大学 | Encryption and transmission method based on constellation rotation in TR _ OFDM system |
| CN111935711A (en) * | 2020-06-04 | 2020-11-13 | 中国人民解放军空军工程大学 | Wireless communication data-carrying AN-assisted secure transmission method and application |
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