CN113381956B - Safe communication method based on motion state space position point - Google Patents
Safe communication method based on motion state space position point Download PDFInfo
- Publication number
- CN113381956B CN113381956B CN202110927971.0A CN202110927971A CN113381956B CN 113381956 B CN113381956 B CN 113381956B CN 202110927971 A CN202110927971 A CN 202110927971A CN 113381956 B CN113381956 B CN 113381956B
- Authority
- CN
- China
- Prior art keywords
- phase
- value
- receiving end
- receiver
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
- H04L27/22—Demodulator circuits; Receiver circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention discloses a safe communication method based on a motion state space position point, and belongs to the technical field of communication. The method comprises a configuration step, a training step and a communication step; firstly, configuring the module composition of a transmitter and a receiver, and then carrying out communication after the training step is finished. The method of the invention can realize the safe communication based on the space position points in the motion state, namely, for any space position point where the target receiver in the motion state is positioned, the target receiver can receive the correct QPSK constellation map, but the eavesdropping receiver can not receive the correct QPSK constellation map, thereby achieving the purpose of the safe communication of the space position points in the motion state.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a safe communication method based on a motion state space position point.
Background
In communication, a system is vulnerable to eavesdropping, counterfeiting, tampering, and the like. The existing anti-interception and anti-spoofing means depends on an upper-layer encryption and authentication technology, and with the improvement of computing capacity, the upper-layer encryption and authentication technology faces the challenges of difficult key management, distribution and maintenance, high operation overhead of long keys, resource waste and the like. In order to cope with these problems, physical layer secure communication has been proposed at home and abroad, and the randomness of the physical layer itself is utilized to break away from the tolerance of the long key. At present, the safety communication technology of a wider physical layer, such as an airspace beam forming technology and a direction modulation technology, can only solve the safety problem of an angle domain.
The chinese patent application No. 202110470951.5 entitled "a secure communication system based on spatial location points" discloses a secure communication system based on a distance domain, which realizes the security guarantee over the distance domain, but the secure communication system still has certain limitations, i.e., a transmitter and a receiver always perform correct transceiving at a fixed location point, and for other application contexts of secure communication, i.e., when the transceiver is in a moving state, the secure communication mode provided by the system is no longer applicable.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a safe communication method based on a motion state space position point.
The technical problem proposed by the invention is solved as follows:
a safe communication method based on a motion state space position point comprises the following steps:
a configuration step:
the transmitter and the receiver are both provided with a transmitting end and a receiving end; the transmitting terminal configuration specifically comprises a transmitting terminal time counting module, a constellation mapping module, a transmitting terminal phase rotation module and a transmitting terminal phase precompensation module; the receiving end configuration specifically comprises a receiving end time counting module, a receiving end phase rotation module, a receiving end phase compensation module and a constellation inverse mapping module;
training:
setting the current mode of the transmitting end and the receiving end of the transmitter and the receiver as a training mode, generating periodic pulses by a transmitting end time counting module of the transmitter, and updating the count value of a forward counter and the value of a transmitting end register; a receiving end time counting module of the receiver generates periodic pulses and updates the count value of the counter and the value of a receiving end register; the training protocol calculates the phase of an output signal according to the count value of the forward counter, the value of the transmitting end register, the count value of the reverse counter and the value of the receiving end register; a receiving end phase compensation module of the receiver calculates a receiving end phase compensation value according to the phase of the output signal; a phase precompensation module of the transmitter calculates a phase precompensation value;
communication step:
setting the current modes of a transmitting end of a transmitter and a receiving end of a receiver as training modes, and setting the current modes of the receiving end of the transmitter and the transmitting end of the receiver as working modes; or setting the current modes of the transmitting end of the transmitter and the receiving end of the receiver as working modes, and setting the current modes of the receiving end of the transmitter and the transmitting end of the receiver as training modes; or setting the current modes of the transmitting end and the receiving end of the transmitter and the receiver as working modes;
a receiving end phase compensation module of the receiver calculates a receiving end phase compensation value; a phase precompensation module of the transmitter calculates a phase precompensation value; the transmitting end of the transmitter transmits data to the receiving end of the receiver, and the constellation mapping module calculates the disturbed signal code chip; the transmitting end phase rotation module performs phase rotation on the disturbed signal chip to obtain a rotated transmitting signal chip; the transmitting end phase precompensation module performs phase precompensation on the rotated transmitting signal chips according to the phase precompensation value to obtain the transmitting signal chips after the phase precompensation and sequentially transmits the transmitting signal chips to the receiving end of the receiver; a receiving end phase rotation module of the receiver sequentially performs matched filtering, equalization operation and phase rotation on a received signal to obtain a rotated received signal chip; the receiving end phase compensation module performs phase compensation on the rotated received signal chip according to the receiving end phase compensation value to obtain a phase-compensated received signal chip; the constellation inverse mapping module adds the received signal chips after the phase compensation to obtain a received signal, and performs inverse mapping on the received signal to obtain a received bit stream.
Further, the specific process of calculating the phase of the output signal by the training protocol is as follows: generating a pilot signal by a training protocol; the transmitting end phase rotation module generates a first lookup table, reads a transmitting end training phase rotation signal value and performs phase rotation on the pilot signal, and the transmitting end phase pre-compensation module performs phase pre-compensation on the pilot signal after phase rotation and then transmits the pilot signal to the receiving end of the receiver; a receiving end phase rotation module of the receiver generates a second lookup table, reads a receiving end training phase rotation signal value and sequentially performs matched filtering, equalization operation and phase rotation on a received signal to obtain a rotated received pilot frequency; the training protocol finds the cross-correlation function of the rotated received pilot and pilot signal, and takes the phase of the cross-correlation function as the phase of the output signal.
Further, in the training step, the specific process of calculating the receiving end phase compensation value by the receiving end phase compensation module of the receiver is as follows: reading the current modes of the transmitting end and the receiving end of the receiver and registering the current modes in a second state register; the second flag bit register determines the value of the second flag bit register according to the value of the second state register; according to the values of the second state register and the second flag bit register, determining the initial position point phase register value and the current position point phase value as the phases of the output signals, and making the phase compensation value of the receiving end be 0; and calculating a phase change value according to the initial position point phase register value and the current position point phase value.
In the working step, the specific process of calculating the receiving end phase compensation value by the receiving end phase compensation module of the receiver is as follows: reading the current modes of the transmitting end and the receiving end of the receiver and registering the current modes in a second state register; the second flag bit register determines the value of the second flag bit register according to the value of the second state register; updating an initial position point phase register value, a current position point phase value and a receiving end phase compensation value according to the values of a second state register and a second flag bit register; and calculating a phase change value according to the initial position point phase register value and the current position point phase value.
Further, the specific process of calculating the phase precompensation value by the phase precompensation module of the transmitter is as follows: reading the current modes of a transmitting end and a receiving end of a transmitter and registering the current modes in a first state register; the first flag bit register determines the value of the first flag bit register according to the value of the first status register; and determining a phase precompensation value according to the values of the first state register and the first flag bit register and the phase change value.
Further, the specific process of the transmitting end phase precompensation module performing phase precompensation on the rotated transmitting signal chips according to the phase precompensation value is as follows: and multiplying the rotated transmitting signal chip by the complex exponential power of the phase precompensation value to obtain the transmitting signal chip after the phase precompensation.
Further, the specific process of the receiving end phase compensation module performing phase compensation on the rotated received signal chip according to the receiving end phase compensation value is as follows: and multiplying the rotated received signal chip by the complex exponential power of the phase compensation value of the receiving end to obtain the phase-compensated received signal chip.
Further, a transmitter and a receiver are a set of relative concepts, and when the receiver is used for transmitting and the transmitter is used for receiving, the transmitting end of the receiver is used as the transmitting end of the transmitter, and the receiving end of the transmitter is used as the receiving end of the receiver.
The invention has the beneficial effects that:
the safe communication method can realize the safe communication based on the space position point in the motion state, namely, the target receiver can receive the correct QPSK constellation map for any space position point where the target receiver in the motion state is positioned, and the correct QPSK constellation map cannot be received once the relative position of the eavesdropping receiver and the target receiver is changed, so that the aim of the safe communication of the space position point in the motion state is fulfilled.
Drawings
Fig. 1 is a schematic diagram of a data interaction flow of the secure communication method according to the present invention.
Detailed Description
The invention is further described below with reference to the figures and examples.
The embodiment provides a secure communication method based on a motion state space position point, a data interaction flow diagram of which is shown in fig. 1, and the secure communication method is based on a secure communication system, wherein the secure communication system comprises a transmitter, a receiver and a training protocol; the transmitter and the receiver both comprise a transmitting end and a receiving end; the transmitting end comprises a transmitting end time counting module, a constellation mapping module, a transmitting end phase rotation module and a transmitting end phase pre-compensation module; the receiving end comprises a receiving end time counting module, a receiving end phase rotation module, a receiving end phase compensation module and a constellation inverse mapping module; the operation of the secure communication system is a training step and a communication step in sequence.
The method of the embodiment comprises the following steps:
a configuration step:
the transmitter and the receiver are both provided with a transmitting end and a receiving end; the transmitting terminal configuration specifically comprises a transmitting terminal time counting module, a constellation mapping module, a transmitting terminal phase rotation module and a transmitting terminal phase precompensation module; the receiving end configuration specifically comprises a receiving end time counting module, a receiving end phase rotation module, a receiving end phase compensation module and a constellation inverse mapping module;
the transmitter and the receiver are a set of relative concepts, when the receiver is used for transmitting and the transmitter is used for receiving, the transmitting end of the receiver is used as the transmitting end of the transmitter, and the receiving end of the transmitter is used as the receiving end of the receiver;
respectively inputting current modes at a transmitting end and a receiving end of a transmitter and a receiver, wherein possible mode inputs are a training mode (T) and a working mode (W); the current modes of the transmitting end of the transmitter and the receiving end of the receiver are the same, and the current modes of the receiving end of the transmitter and the transmitting end of the receiver are the same;
the specific process of the training step is as follows:
s1, setting the current mode of the transmitter and receiver as training mode, and making the phase pre-compensation module in the transmitterMInitial value of each phase precompensation value is 0mA phase precompensation value of
，1≤m≤M，MIs a positive integer;
s2, when the transmitting end of the transmitter is electrified, the transmitting end time counting module generates periodic pulses and updates the count value of the forward counter and the value of the transmitting end register;
the specific process of S2 is as follows:
s2.1: generating a periodic pulse having a period ofTI.e. the time interval between adjacent pulses isTA system clock period;
s2.2: starting upMA forward counter starts counting from 0
Is shown asmThe current count value of the forward counter, when the next system clock rising edge comes, the firstmThe count value of each forward counter is updated as:
wherein the content of the first and second substances,tmod represents the remainder for time, and,Nis the maximum value of the forward counter;
s2.3: starting upMAn initial value of 0Device, use
Is shown asmThe current value of the register of each origin, when the next periodic pulse comesmThe value of each originating register is updated to:
s3, when the receiving end of the receiver is electrified, the receiving end time counting module generates periodic pulses, and the counting value of the counter and the value of the receiving end register are updated;
the specific process of S3 is as follows:
s3.1: generating a periodic pulse having a period ofT；
S3.2: starting upMA counter for counting from 0
Is shown asmThe current count value of the counter is inverted when the next rising edge of the system clock comesmThe count value of each counter is updated as:
s3.3: starting upMA receive register with an initial value of 0
Is shown asmThe current value of the receive register, when the next periodic pulse arrives, the firstmThe value of each receive register is updated as:
s4, after the transmitting end of the transmitter and the receiving end of the receiver are powered on, the training protocol calculates the phase of the output signal
，
；
The specific process of S4 is as follows:
s4.1: generated at the transmitting end of the transmitterMRoad pilot signal
；
S4.2: the originating phase rotation module generates a length ofNThe first lookup table is in the second lookup tableiThe value stored at an address is
，
，KIs a positive integer and is a non-zero integer,jis an imaginary unit;
s4.3: when the periodic pulse generated by the originating time counting module arrives, the method comprisesMThe current value of each originating register is an address; at other times, in order toMThe current count value of each forward counter is an address;
reading in a first lookup tableMA value stored at an address asMTraining phase rotation signal values for individual originating terminals
；
S4.4: origin phase rotation module basisMTraining phase rotation signal value, pair for each originating terminalMThe pilot signal is phase-rotated to obtainMPilot signal after path rotation:
wherein the content of the first and second substances,
is shown asmA pilot signal after the path rotation;
s4.5: originating phase precompensation module pairMThe pilot signal after the rotation is subjected to phase pre-compensation to obtainMPilot signal after path phase precompensation:
wherein the content of the first and second substances,
is shown asmPilot signals after path phase precompensation;
s4.6: will be provided withMPilot signals after the path phase precompensation are sequentially sent to a receiving end of a receiver;
s4.7: the receiving end phase rotation module generates a length ofNWherein the second lookup table is in the first lookup tableiThe value stored at an address is
；
S4.8: when the periodic pulse generated by the receiving end time counting module arrives, the receiving end time counting module is used for counting the time of the periodic pulseMThe current value of each receiving end register is an address; at other times, in order toMThe current count value of each counter is an address;
reading in the second lookup tableMA value stored at an address asMTraining phase rotation signal value by receiving end
；
S4.9: to receiveMPerforming matched filtering and equalization operation on the pilot signal after the path phase precompensation to obtainMWay receive pilot
；
S4.10: according toMReceiving end trainingTraining phase rotation signal value, pairMThe pilot frequency is received and phase rotation is carried out to obtainMReceiving pilot frequency after path rotation:
s4.11: obtainingMReceiving pilot sum after path rotationMCross correlation function of the pilot signals:
wherein, the superscript indicates taking conjugation;
calculating a cross-correlation function
Phase of
To findMPhase of output signal
；
S5, in the receiving end of the receiver, the receiving end phase compensation module executes the following steps to determineMA phase change value;
s5.1, reading the current modes of the transmitting end and the receiving end of the receiver and registering the current modes in a second state register; second status register is commonTT、TW、WTAndWWin the four states of the system, the system is provided with a plurality of states,TTindicating that both the receiving and transmitting ends of the receiver are in training mode,TWindicating that the receiver side and the transmitter side of the receiver are in a training mode and an operational mode respectively,WTindicating that the receiver side and the transmitter side of the receiver are in an operating mode and a training mode respectively,WWindicating that the receiving end and the transmitting end of the receiver are both in the working mode; the initial state of the second status register is set toTT；
S5.2 the second zone bit register determines the value thereof according to the value of the second state register, and the specific mode is as follows:
initializing the value of the second flag registerFlag2=0；
If the value of the second status register isTTThe value of the second flag bit registerFlag2=Flag2；
If the value of the second status register isTWThe value of the second flag bit registerFlag2=1；
If the value of the second status register isWTThe value of the second flag bit registerFlag2=0；
If the value of the second status register isWWThe value of the second flag bit registerFlag2=Flag2；
S5.3 determining from the values of the second status register and the second flag bit registerMInitial position point phase register value
、MPhase value of current position point
AndMphase compensation value of receiving end
The concrete mode is as follows:
if the value of the second status register isTT，
，
，
；
If the value of the second status register isTW，
，
，
；
If the value of the second status register isWT， 
，
，
；
If the value of the second status register isWWAnd isFlag2=0，
，
，
；
If the value of the second status register isWWAnd isFlag2=1，
，
，
；
S5.4 basisMInitial position point phase register value
AndMphase value of current position point
CalculatingMPhase change value:
wherein the content of the first and second substances,
is shown asmA phase change value;
s6, in the transmitting end of the transmitter, the phase pre-compensation module performs the following steps to determineMA phase pre-compensation value;
s6.1, reading the current modes of a transmitting end and a receiving end of a transmitter and registering the current modes in a first state register; first status register is commonTT、TW、WTAndWWin the four states of the system, the system is provided with a plurality of states,TTindicating that both the transmitting end and the receiving end of the transmitter are in training mode,TWindicating that the transmitter transmitting end and the receiver receiving end are in training mode and operating mode respectively,WTindicating that the transmitter transmitting end and the receiver receiving end are in an operating mode and a training mode respectively,WWindicating that both the transmitter and the receiver are in the operating mode; the initial state of the first status register is set toTT；
S6.2, the first zone bit register determines the value thereof according to the value of the first state register, and the specific mode is as follows:
initializing a value of a first flag bit registerFlag1=0；
If the value of the first status register isTTValue of the first flag bit registerFlag1=Flag1；
If the value of the first status register isTWValue of the first flag bit registerFlag1=1；
If the value of the first status register isWTValue of the first flag bit registerFlag1=0；
If the value of the first status register isWWValue of the first flag bit registerFlag1=Flag1；
S6.3 determining the initial phase precompensation module according to the values of the first status register and the first zone bit registerMA phase precompensation value
The concrete mode is as follows:
if the value of the first status register isTT，
；
If the value of the first status register isTW，
；
If the value of the first status register isWT，
；
If the value of the first status register isWWAnd isFlag1=0，
；
If the value of the first status register isWWAnd isFlag1=1，
。
The specific process of the communication step is as follows:
setting the current modes of a transmitting end of a transmitter and a receiving end of a receiver as training modes, and setting the current modes of the receiving end of the transmitter and the transmitting end of the receiver as working modes;
or setting the current modes of the transmitting end of the transmitter and the receiving end of the receiver as working modes, and setting the current modes of the receiving end of the transmitter and the transmitting end of the receiver as training modes;
or setting the current modes of the transmitting end and the receiving end of the transmitter and the receiver as working modes;
S5-S6 of performing the training step;
s7, the transmitting end of the transmitter sends data to the receiving end of the receiver, the constellation mapping module calculates after the sending bit stream arrivesMA disturbed signal chip
；
The specific process of S7 is as follows:
s7.1: according to predefinedLA constellation of order, mapping the transmitted bit stream to an inphase/quadrature signal s: (t) S, byt) For the original signal, generatingMA signal chip
The signal value of each signal chip is s: (t)/M；
S7.2: computingMSum of time-varying noise:
wherein the content of the first and second substances,
is as followsmTime-varying noise;
the time-varying noise generation method comprises the following steps: to 2MThe shift register with group length of 11 is given different initial values, shift operation is carried out when the rising edge of each system clock arrives, and the value of the last 5 bits of each group of shift registers is converted into decimal number to obtain 2MTime-varying random integer
Calculating the firstmTime varying noise
，
Denotes No. 2m-1 time-varying random integer number,
denotes No. 2m-1 time-varying random integer;
s7.3: by usingMTime-varying noise pairMDisturbing each signal chip, wherein the specific disturbing mode is as follows:
wherein the content of the first and second substances,
indicating after disturbancemA signal chip;
s8, the originating phase rotation module generates in the constellation mapping moduleMAfter scrambling the signal chip, calculatingMA chip of the transmitted signal after rotation
And sequentially sending the signals to a transmitting end phase precompensation module;
the specific process of S8 is as follows:
s8.1: when the periodic pulse generated by the originating time counting module arrives, the method comprisesMThe current value of each originating register is an address; at other times, in order toMThe current count value of each forward counter is an address;
reading in a first lookup tableMA value stored at an address asMPhase rotation signal value of each transmitter
；
S8.2: according toMIndividual originating phase rotation signal value, pairMPhase rotation is carried out on the disturbed signal chip to obtainMOne rotated transmitted signal chip:
wherein the content of the first and second substances,
is shown asmTransmitting signal chips after rotation;
s8.3: will be provided withMTransmitting signal chips after rotation are sequentially sent to a transmitting end phase precompensation module;
s9 receiving by the initial phase pre-compensation moduleMAfter transmitting signal chips after rotating, executing the following steps:
s9.1 basisMA phase precompensation value, pairMThe phase precompensation is carried out on the rotated transmitting signal chip to obtainMPhase precompensated transmit signal chips:
wherein the content of the first and second substances,
is shown asmTransmitting signal chips after phase precompensation;
s9.2 willMThe transmitting signal chips after the phase precompensation are sequentially sent to a receiving end of a receiver.
S10, in the receiving end of the receiver, the receiving end phase rotation module receivesMAfter transmitting signal chip after pre-compensating phase, calculatingMA rotated received signal chip
；
The specific process of S10 is as follows:
s10.1: when the periodic pulse generated by the receiving end time counting module arrives, the receiving end time counting module is used for counting the time of the periodic pulseMThe current value of each receiving end register is an address; at other times, in order toMThe current count value of each counter is an address;
reading in the second lookup tableMA value stored at an address asMPhase rotation of each receiving endValue of the transfer signal
；
S10.2: to receiveMCarrying out matched filtering and equalization operation on the transmitting signal chips after the phase precompensation to obtainMA chip of received signal
；
S10.3: according toMA receiving end phase rotation signal value, pairMPhase rotation is carried out on the received signal chips to obtainMRotated received signal chips:
wherein the content of the first and second substances,
is shown asmReceiving signal chips after rotation;
s11 receiving end phase compensation moduleMAfter the rotated received signal chips arrive, the following steps are executed:
s11.1 basisMPhase compensation value of receiving end
To, forMCarrying out phase compensation on the rotated received signal chips to obtainMPhase compensated received signal chips:
wherein the content of the first and second substances,r (m),comprx (t) Is shown asmReceiving signal chips after phase compensation;
s11.2 willMAnd the received signal chips after the phase compensation are sequentially sent to a constellation inverse mapping module.
S12 constellation inverse mappingIs a module atMAfter the arrival of the received signal chips after phase compensation, the received signal chips are processedMAdding the received signal chips after phase compensation to obtain a received signalLAnd the order constellation diagram is used for carrying out inverse mapping on the received signal to obtain the received bit stream.
The specific process of S12 is as follows:
s12.1: will be provided withMAdding the received signal chips after phase compensation to obtain a received signal
：
S12.2: according toLStep constellation of received signal
And carrying out inverse mapping to obtain a receiving bit stream.
Claims (4)
1. A safe communication method based on a motion state space position point is characterized by comprising the following steps:
a configuration step:
the transmitter and the receiver are both provided with a transmitting end and a receiving end; the transmitting terminal configuration specifically comprises a transmitting terminal time counting module, a constellation mapping module, a transmitting terminal phase rotation module and a transmitting terminal phase precompensation module; the receiving end configuration specifically comprises a receiving end time counting module, a receiving end phase rotation module, a receiving end phase compensation module and a constellation inverse mapping module;
training:
setting the current mode of the transmitting end and the receiving end of the transmitter and the receiver as a training mode, generating periodic pulses by a transmitting end time counting module of the transmitter, and updating the count value of a forward counter and the value of a transmitting end register; a receiving end time counting module of the receiver generates periodic pulses and updates the count value of the counter and the value of a receiving end register; the training protocol calculates the phase of an output signal according to the count value of the forward counter, the value of the transmitting end register, the count value of the reverse counter and the value of the receiving end register; a receiving end phase compensation module of the receiver calculates a receiving end phase compensation value according to the phase of the output signal; a phase precompensation module of the transmitter calculates a phase precompensation value;
the specific process of calculating the phase of the output signal by the training protocol comprises the following steps: generating a pilot signal by a training protocol; the transmitting end phase rotation module generates a first lookup table, reads a transmitting end training phase rotation signal value and performs phase rotation on the pilot signal, and the transmitting end phase pre-compensation module performs phase pre-compensation on the pilot signal after phase rotation and then transmits the pilot signal to the receiving end of the receiver; a receiving end phase rotation module of the receiver generates a second lookup table, reads a receiving end training phase rotation signal value and sequentially performs matched filtering, equalization operation and phase rotation on a received signal to obtain a rotated received pilot frequency; the training protocol calculates the cross-correlation function of the received pilot frequency and the pilot frequency signal after rotation, and takes the phase of the cross-correlation function as the phase of the output signal;
in the training step, the specific process of calculating the receiving end phase compensation value by the receiving end phase compensation module of the receiver is as follows: reading the current modes of the transmitting end and the receiving end of the receiver and registering the current modes in a second state register; the second flag bit register determines the value of the second flag bit register according to the value of the second state register; according to the values of the second state register and the second flag bit register, determining the initial position point phase register value and the current position point phase value as the phases of the output signals, and making the phase compensation value of the receiving end be 0; calculating a phase change value according to the initial position point phase register value and the current position point phase value;
communication step:
setting the current modes of a transmitting end of a transmitter and a receiving end of a receiver as training modes, and setting the current modes of the receiving end of the transmitter and the transmitting end of the receiver as working modes; or setting the current modes of the transmitting end of the transmitter and the receiving end of the receiver as working modes, and setting the current modes of the receiving end of the transmitter and the transmitting end of the receiver as training modes; or setting the current modes of the transmitting end and the receiving end of the transmitter and the receiver as working modes;
a receiving end phase compensation module of the receiver calculates a receiving end phase compensation value; a phase precompensation module of the transmitter calculates a phase precompensation value; the transmitting end of the transmitter transmits data to the receiving end of the receiver, and the constellation mapping module calculates the disturbed signal code chip; the transmitting end phase rotation module performs phase rotation on the disturbed signal chip to obtain a rotated transmitting signal chip; the transmitting end phase precompensation module performs phase precompensation on the rotated transmitting signal chips according to the phase precompensation value to obtain the transmitting signal chips after the phase precompensation and sequentially transmits the transmitting signal chips to the receiving end of the receiver; a receiving end phase rotation module of the receiver sequentially performs matched filtering, equalization operation and phase rotation on a received signal to obtain a rotated received signal chip; the receiving end phase compensation module performs phase compensation on the rotated received signal chip according to the receiving end phase compensation value to obtain a phase-compensated received signal chip; the constellation inverse mapping module adds the received signal chips after the phase compensation to obtain a received signal, and performs inverse mapping on the received signal to obtain a received bit stream;
in the communication step, the specific process of calculating the receiving end phase compensation value by the receiving end phase compensation module of the receiver is as follows: reading the current modes of the transmitting end and the receiving end of the receiver and registering the current modes in a second state register; the second flag bit register determines the value of the second flag bit register according to the value of the second state register; updating an initial position point phase register value, a current position point phase value and a receiving end phase compensation value according to the values of a second state register and a second flag bit register; calculating a phase change value according to the initial position point phase register value and the current position point phase value;
the specific process of calculating the phase precompensation value by the phase precompensation module of the transmitter is as follows: reading the current modes of a transmitting end and a receiving end of a transmitter and registering the current modes in a first state register; the first flag bit register determines the value of the first flag bit register according to the value of the first status register; and determining a phase precompensation value according to the values of the first state register and the first flag bit register and the phase change value.
2. The method according to claim 1, wherein the specific process of the originating phase pre-compensation module performing phase pre-compensation on the rotated transmit signal chips according to the phase pre-compensation value comprises: and multiplying the rotated transmitting signal chip by the complex exponential power of the phase precompensation value to obtain the transmitting signal chip after the phase precompensation.
3. The method according to claim 1, wherein the specific process of the receiving-end phase compensation module performing phase compensation on the rotated received signal chips according to the receiving-end phase compensation value comprises: and multiplying the rotated received signal chip by the complex exponential power of the phase compensation value of the receiving end to obtain the phase-compensated received signal chip.
4. The method of claim 1, wherein the transmitter and the receiver are a set of relative concepts, and when the receiver is used for transmitting and the transmitter is used for receiving, the transmitting end of the receiver is used as the transmitting end of the transmitter, and the receiving end of the transmitter is used as the receiving end of the receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110927971.0A CN113381956B (en) | 2021-08-13 | 2021-08-13 | Safe communication method based on motion state space position point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110927971.0A CN113381956B (en) | 2021-08-13 | 2021-08-13 | Safe communication method based on motion state space position point |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113381956A CN113381956A (en) | 2021-09-10 |
| CN113381956B true CN113381956B (en) | 2021-12-03 |
Family
ID=77577234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110927971.0A Active CN113381956B (en) | 2021-08-13 | 2021-08-13 | Safe communication method based on motion state space position point |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113381956B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820986A (en) * | 2012-07-24 | 2012-12-12 | 福建星网锐捷网络有限公司 | Self-adaptation method, device and network equipment for working mode of fiber channel interface |
| CN112104582A (en) * | 2020-11-09 | 2020-12-18 | 电子科技大学 | I/Q domain modulation method, double domain modulation method and multiple access communication method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6628707B2 (en) * | 2001-05-04 | 2003-09-30 | Radiant Networks Plc | Adaptive equalizer system for short burst modems and link hopping radio networks |
| US7599418B2 (en) * | 2006-02-16 | 2009-10-06 | Pine Valley Investments, Inc. | Method and apparatus for a frequency hopper |
| CN103501193B (en) * | 2007-08-20 | 2017-04-12 | 瑞登有限责任公司 | Method for compensating for MU-MAS and dynamically adapting to MU-MAS |
| CN101990291B (en) * | 2009-07-30 | 2013-07-03 | 中兴通讯股份有限公司 | Method for pre-compensating frequency bias as well as device |
| CN106230511B (en) * | 2016-08-31 | 2018-07-17 | 南京恩瑞特实业有限公司 | 5G distributed base station antenna rf optical transmission systems |
| US10848361B2 (en) * | 2017-12-08 | 2020-11-24 | Qualcomm Incorporated | Carrier independent signal transmission and reception |
| CN110034880B (en) * | 2018-01-12 | 2021-12-10 | 展讯通信（上海）有限公司 | Downlink transmission direct-current component indication and receiving method and device, storage medium, base station and user equipment |
| CN112887244B (en) * | 2021-04-29 | 2021-08-06 | 电子科技大学 | Safety communication system based on spatial position point |
-
2021
- 2021-08-13 CN CN202110927971.0A patent/CN113381956B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820986A (en) * | 2012-07-24 | 2012-12-12 | 福建星网锐捷网络有限公司 | Self-adaptation method, device and network equipment for working mode of fiber channel interface |
| CN112104582A (en) * | 2020-11-09 | 2020-12-18 | 电子科技大学 | I/Q domain modulation method, double domain modulation method and multiple access communication method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113381956A (en) | 2021-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107707360B (en) | Heterogeneous polymerization signcryption method in Internet of things environment | |
| Zhang et al. | Practical secure and privacy-preserving scheme for value-added applications in VANETs | |
| Hirota | Practical security analysis of a quantum stream cipher by the Yuen 2000 protocol | |
| JPH0541716A (en) | Digital transmission system | |
| CN106936592B (en) | Three-party authentication key agreement method based on extended chaos algorithm | |
| CN104717074A (en) | Shared key security communication method for fusing private information | |
| Aziz et al. | SecureAIS-securing pairwise vessels communications | |
| WO2021213631A1 (en) | Improved cryptographic method and system | |
| CN113381956B (en) | Safe communication method based on motion state space position point | |
| CN112887244B (en) | Safety communication system based on spatial position point | |
| CN108540287A (en) | Internet of Things safety management encryption method | |
| CN105916139B (en) | The method for improving user information safety using constellation conversion in wireless communication system | |
| CN103139123A (en) | MPPSK demodulation method based on location information | |
| CN107124382A (en) | Frequency conversion spread spectrum modulation technique, modulator and frequency conversion spread spectrum demodulation method, demodulator | |
| CN107222441B (en) | Novel differential chaos keying communication method | |
| Gao et al. | Low cost RFID security protocol based on rabin symmetric encryption algorithm | |
| CA2525552A1 (en) | Des algorithm-based encryption method | |
| US11811506B2 (en) | Application of key exchange based physical layer security methods | |
| CN105187198B (en) | A kind of aes algorithm hardware realization apparatus under ipsec protocol | |
| US20230421284A1 (en) | Random phase modulation method depending on communication distance | |
| CN110401525B (en) | Quantum blind signature method for preventing signer from eavesdropping | |
| CN108400865A (en) | One kind being based on DCSK chaos encrypting methods | |
| US20090138743A1 (en) | Method and apparatus for secure communication between cryptographic systems using real time clock | |
| CN102355356A (en) | Asymmetric encryption method suitable for ZIGBEE wireless meter reading | |
| WO2022116314A1 (en) | Lightweight active cross-level verification method for smart grid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |