CN113645035A - Physical layer secure transmission method, system, device and computer readable storage medium - Google Patents
Physical layer secure transmission method, system, device and computer readable storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/065—Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
- H04L9/0656—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7136—Arrangements for generation of hop frequencies, e.g. using a bank of frequency sources, using continuous tuning or using a transform
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0057—Block codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0076—Distributed coding, e.g. network coding, involving channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/001—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using chaotic signals
Abstract
The invention discloses a physical layer secure transmission method, a system, equipment and a computer readable storage medium, wherein the physical layer secure transmission method comprises the following steps: generating a pseudo-random sequence based on the clock information of the synchronization of the transmitting and receiving ends; determining transmission parameters of each signal processing module based on the pseudo-random sequence; a transmit signal is generated based on the plurality of signal processing modules having determined transmission parameters. By adopting the invention, an integrated multidimensional safe transmission method aiming at a plurality of functional modules can be realized. On one hand, the transmission parameters of the signal processing modules are different in each transmission, so that multi-dimensional safe transmission based on multiple modules is realized, and the safety is further improved; on the other hand, all the transmission parameters are produced based on the same pseudorandom series, so that the integrated joint design of multi-module transmission is realized, and the realization complexity is further reduced.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method, a system, a device, and a computer-readable storage medium for physical layer secure transmission.
Background
The openness of wireless channels causes wireless communication to face greater security threats, and secure transmission increasingly becomes an important requirement of wireless communication on the basis of broadband reliable transmission. The traditional secure transmission is realized by encrypting an information source at an upper layer mainly by means of a bit field information encryption and decryption algorithm, but with the appearance and maturity of quantum computers and DNA computers, a key decrypter can rapidly break an encryption system based on computational security, and the security of information encryption and decryption is increasingly reduced.
Disclosure of Invention
Embodiments of the present invention provide a method, a system, a device, and a computer-readable storage medium for secure transmission in a physical layer, so as to solve the problem in the prior art that security of information encryption and decryption is low.
The physical layer secure transmission method according to the embodiment of the invention comprises the following steps:
generating a pseudo-random sequence based on the clock information of the synchronization of the transmitting and receiving ends;
determining transmission parameters of each signal processing module based on the pseudo-random sequence;
a transmit signal is generated based on the plurality of signal processing modules having determined transmission parameters.
According to some embodiments of the present invention, the generating a pseudo-random sequence based on clock information synchronized at a transceiving end includes:
the pseudo-random sequence generator takes the synchronous clock information of the receiving and transmitting ends as random seeds and adopts a feedback shift register method to generate a binary pseudo-random sequence with the length of n.
According to some embodiments of the invention, the respective signal processing modules comprise: the device comprises a channel coding module, an interleaving module, a constellation modulation module, an OFDM module and a carrier frequency hopping module.
According to some embodiments of the present invention, the channel coding module employs a low density parity check code, and the transmission parameter of the channel coding module is a binary check matrix with a number of rows K and a number of columns N;
the interleaving module adopts a block interleaver, and the transmission parameters of the interleaving module are the row number S1 and the column number S2 of the block interleaver;
the constellation modulation module adopts quadrature amplitude modulation or amplitude phase modulation, and the transmission parameter of the constellation modulation module is a modulation constellation;
the number of FFT transform points adopted by the OFDM module is T, and the transmission parameter of the OFDM module is the subscript sequence of the selected subcarrier.
According to some embodiments of the invention, the determining the transmission parameters of the respective signal processing modules based on the pseudo-random sequence comprises:
inputting the pseudo-random sequence and a preset initial check matrix with K rows and N columns into a channel coding transmission parameter generator, and outputting a binary check matrix with K rows and N columns;
inputting the pseudo-random sequence and a preset interleaving length S into an interleaving transmission parameter generator to output the row number S1 and the column number S2 of a block interleaver;
inputting the pseudo-random sequence and a preset initial modulation constellation into a modulation constellation transmission parameter generator to output a transmission modulation constellation with the same order as the initial modulation constellation;
inputting the pseudo-random sequence and a preset subcarrier number t into an OFDM transmission parameter generator to output a subcarrier subscript sequence with the length of t;
and generating a frequency hopping pattern by adopting a method based on a chaos theory based on the pseudo-random sequence.
The physical layer secure transmission system according to the embodiment of the present invention includes:
the pseudo-random sequence generator is used for generating a pseudo-random sequence based on the synchronous clock information of the transmitting and receiving ends;
a transmission parameter generator for determining transmission parameters of the respective signal processing modules based on the pseudo random sequence;
a transmit signal generator for generating a transmit signal based on the plurality of signal processing modules having determined transmission parameters.
According to some embodiments of the invention, the pseudo-random sequence generator is configured to:
and (3) generating a binary pseudorandom sequence with the length of n by using clock information synchronized with a transmitting end and a receiving end as a random seed and adopting a feedback shift register method.
According to some embodiments of the invention, the respective signal processing modules comprise: the device comprises a channel coding module, an interleaving module, a constellation modulation module, an OFDM module and a carrier frequency hopping module;
the channel coding module adopts a low-density parity check code, and the transmission parameter of the channel coding module is a binary check matrix with K rows and N columns;
the interleaving module adopts a block interleaver, and the transmission parameters of the interleaving module are the row number S1 and the column number S2 of the block interleaver;
the constellation modulation module adopts quadrature amplitude modulation or amplitude phase modulation, and the transmission parameter of the constellation modulation module is a modulation constellation;
the number of FFT transform points adopted by the OFDM module is T, and the transmission parameter of the OFDM module is the subscript sequence of the selected subcarrier;
the transmission parameter generator includes:
a channel coding transmission parameter generator, configured to output a binary check matrix with K rows and N columns based on the pseudo-random sequence and a preset initial check matrix with K rows and N columns;
an interleaving transmission parameter generator for outputting the number of rows S1 and the number of columns S2 of a block interleaver based on the pseudo random sequence and a preset interleaving length S;
a modulation constellation transmission parameter generator, configured to output a transmission modulation constellation with the same order as the initial modulation constellation based on the pseudorandom sequence and a preset initial modulation constellation;
the OFDM transmission parameter generator is used for outputting a subcarrier subscript sequence with the length of t based on the pseudorandom sequence and the preset number of subcarriers t;
and the frequency hopping transmission parameter generator is used for generating frequency hopping patterns by adopting a method based on the chaos theory based on the pseudo random sequence.
The physical layer secure transmission device according to the embodiment of the present invention includes: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the physical layer secure transmission method as described above.
According to the computer readable storage medium of the embodiment of the present invention, the computer readable storage medium stores thereon an implementation program of information transfer, which when executed by a processor implements the steps of the physical layer secure transmission method as described above.
By adopting the embodiment of the invention, an integrated multidimensional safe transmission method aiming at a plurality of functional modules can be realized. On one hand, the transmission parameters of the signal processing modules are different in each transmission, so that multi-dimensional safe transmission based on multiple modules is realized, and the safety is further improved; on the other hand, all the transmission parameters are produced based on the same pseudorandom series, so that the integrated joint design of multi-module transmission is realized, and the realization complexity is further reduced.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the drawings:
fig. 1 is a flowchart of a method for physical layer secure transmission according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for physical layer secure transmission according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of transmission parameter generation of a channel coding module according to an embodiment of the present invention;
fig. 4 is a schematic diagram of generation of transmission parameters of a constellation modulation module according to an embodiment of the present invention;
FIG. 5 is a block diagram of a physical layer secure transmission system according to an embodiment of the present invention;
fig. 6 is a block diagram of a physical layer secure transmission apparatus in an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
An embodiment of a first aspect of the present invention provides a physical layer secure transmission method, as shown in fig. 1, including:
s101, generating a pseudo-random sequence based on the synchronous clock information of the transmitting and receiving ends;
s102, determining transmission parameters of each signal processing module based on the pseudo-random sequence;
s103, generating a transmission signal based on the plurality of signal processing modules having determined transmission parameters.
The physical layer secure transmission method is suitable for a signal sending end. The transmitting end is provided with a plurality of signal processing modules, and the transmission parameters of each signal processing module need to be generated based on the generated pseudo-random sequence in each transmission process. The source signal passes through the signal processing modules with determined transmission parameters in sequence, and then the transmission signal of the transmission can be generated.
By adopting the embodiment of the invention, an integrated multidimensional safe transmission method aiming at a plurality of functional modules can be realized. On one hand, the transmission parameters of the signal processing modules are different in each transmission, so that multi-dimensional safe transmission based on multiple modules is realized, and the safety is further improved; on the other hand, all the transmission parameters are produced based on the same pseudorandom series, so that the integrated joint design of multi-module transmission is realized, and the realization complexity is further reduced.
On the basis of the above-described embodiment, various modified embodiments are further proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the various modified embodiments.
According to some embodiments of the present invention, the generating a pseudo-random sequence based on clock information synchronized at a transceiving end includes:
the pseudo-random sequence generator takes the synchronous clock information of the receiving and transmitting ends as random seeds and adopts a feedback shift register method to generate a binary pseudo-random sequence with the length of n.
According to some embodiments of the invention, the respective signal processing modules comprise: the device comprises a channel coding module, an interleaving module, a constellation modulation module, an OFDM module and a carrier frequency hopping module. It should be noted that, this is only a few examples of the transmitting-end signal processing module, and the transmitting-end signal processing module may also include other modules. The number and the type of the signal processing modules at the sending end can be set according to actual conditions.
According to some embodiments of the present invention, the channel coding module employs a low density parity check code, and the transmission parameter of the channel coding module is a binary check matrix with a number of rows K and a number of columns N;
the interleaving module adopts a block interleaver, and the transmission parameters of the interleaving module are the row number S1 and the column number S2 of the block interleaver;
the constellation modulation module adopts quadrature amplitude modulation or amplitude phase modulation, and the transmission parameter of the constellation modulation module is a modulation constellation;
the number of FFT transform points adopted by the OFDM module is T, and the transmission parameter of the OFDM module is the subscript sequence of the selected subcarrier.
According to some embodiments of the invention, the determining the transmission parameters of the respective signal processing modules based on the pseudo-random sequence comprises:
inputting the pseudo-random sequence and a preset initial check matrix with K rows and N columns into a channel coding transmission parameter generator, and outputting a binary check matrix with K rows and N columns;
inputting the pseudo-random sequence and a preset interleaving length S into an interleaving transmission parameter generator to output the row number S1 and the column number S2 of a block interleaver;
inputting the pseudo-random sequence and a preset initial modulation constellation into a modulation constellation transmission parameter generator to output a transmission modulation constellation with the same order as the initial modulation constellation;
inputting the pseudo-random sequence and a preset subcarrier number t into an OFDM transmission parameter generator to output a subcarrier subscript sequence with the length of t;
and generating a frequency hopping pattern by adopting a method based on a chaos theory based on the pseudo-random sequence.
The methods provided herein are not inherently related to any particular computer, virtual machine system, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
The physical layer secure transmission method according to an embodiment of the present invention is described in detail in a specific embodiment with reference to fig. 2 to 4. It is to be understood that the following description is illustrative only and is not intended to be in any way limiting. All similar structures and similar variations thereof adopted by the invention are intended to fall within the scope of the invention.
The physical layer security is a security transmission model established based on the information theory, and can utilize the non-measurable and non-reproducible endogenous security attributes of a wireless channel to establish an endogenous security mechanism of wireless communication from the physical layer, so as to finally realize the absolute security of 'one-time pad' on the information theory level, and the method becomes a key technology for realizing the security transmission.
The current implementation of physical layer security is mainly as follows: the physical layer safety transmission mechanism design is respectively carried out on certain signal processing functional module or certain signal processing functional modules in the physical layer information or signal processing flow.
The main problems faced by it are:
(1) if the transmission mechanism is designed for only one signal processing function module, the safety is limited;
(2) if the transmission mechanism is designed separately for a plurality of signal processing function modules, the security can be improved, but the complexity also rises.
Based on the problems of low security of a single-module mechanism and high complexity of a multi-module mechanism in the prior art in physical layer secure transmission. The invention provides an integrated multi-dimensional physical layer secure transmission method for a plurality of functional modules, which is suitable for a plurality of wireless communication systems (including but not limited to unmanned aerial vehicle data chains, unmanned ship data chains, data chains based on other unmanned platforms, data chains based on other manned platforms, satellite communication chains, ground cellular communication, underwater acoustic communication and the like). The core idea is as follows: at a transmitting end, firstly, a single pseudo-random sequence generator is used for generating a pseudo-random sequence; then, generating transmission parameters of a signal processing module by using a transmission parameter generator according to the same pseudo-random sequence; after the transmission parameters of all the modules are generated, a complete signal processing flow of the transmission can be formed, and the transmission can be carried out. The receiving end keeps the transmission parameters consistent with the transmitting end through the same pseudo code generator, and then the transmission information is recovered.
For a wireless communication system, a communication physical layer of a transmitting end and a receiving end relates to a plurality of signal processing functional modules, for example, a channel coding module is used for error control, an interleaving module is used for burst error discretization, a constellation modulation module is used for conversion from a bit domain to a symbol domain, an Orthogonal Frequency Division Multiplexing (OFDM) module is used for broadband transmission, and a Frequency hopping module is used for interference resistance. In the signal processing module, constellation modulation and OFDM are the basis of broadband digital communication, and channel coding, interleaving and frequency hopping are important technical means for realizing reliable transmission.
Fig. 2 is a schematic diagram of a physical layer secure transmission method according to the present invention, in which at a transmitting end, a pseudo-random sequence generator generates a pseudo-random sequence according to clock information synchronized at the transmitting end and the receiving end; then different transmission parameter generators generate transmission parameters of corresponding signal processing modules according to the same pseudo-random sequence; after all transmission parameters are generated, a complete signal processing flow of the transmission can be formed, information source information generates sending signals after passing through each signal processing module, and the sending signals can be transmitted through an antenna. The receiving end keeps the transmission parameters consistent with the transmitting end through the same pseudo code generator, and then the transmission information is recovered.
Specifically, the physical layer secure transmission method of the embodiment of the present invention includes:
step 1: pseudo-random sequence generation method.
The pseudo-random sequence generator takes the synchronous clock information of the receiving and transmitting ends as random seeds and adopts the current existing feedback shift register method to generate a binary pseudo-random sequence with the length of P.
Step 2: a transmission parameter generation method of a channel coding module.
The channel coding module adopts a low-density parity check code, and the transmission parameter of the channel coding module is a binary check matrix with the row number of K and the column number of N. In each transmission, the input of the channel coding transmission parameter generator is a binary pseudo-random sequence with the length of P (the corresponding decimal pseudo-random number is Q) and a given initial check matrix with the number of rows K and the number of columns N, and the output is a transmission check matrix with the number of rows K and the number of columns N.
Fig. 3 is a schematic diagram of generating transmission parameters of a channel coding module according to an embodiment of the present invention, where a process of generating a transmission check matrix includes:
calculating N1 ═ Q modN, where mod is the sign of the modulo operation;
calculating K1 ═ Q mod K;
and placing the first N1 columns of the initial check matrix after the N columns, and placing the first K1 rows of the initial check matrix after the K rows to finally obtain the transmission check matrix.
And step 3: a transmission parameter generation method for an interleaving module.
The interleaving module adopts a block interleaver, and the transmission parameters of the block interleaver are the number of rows S1 and the number of columns S2. In each transmission, the input of the interleaved transmission parameter generator is a binary pseudo-random sequence of length P (corresponding to a decimal pseudo-random number Q) and a given interleaving length S, and the output is the number of rows S1 and the number of columns S2 of the block interleaver.
The generation process of the row number S1 and the column number S2 of the block interleaver comprises:
s1 is the largest integer that can be evenly divided by S and that satisfies less than (Q mod S);
calculate S2-S divided by S1.
And 4, step 4: a method for generating transmission parameters of a constellation modulation module.
The constellation modulation module adopts quadrature amplitude modulation (including but not limited to QPSK, 16QAM, 64QAM, 256QAM, 512QAM and 1024QAM constellations) or amplitude phase modulation (including but not limited to APSK constellations of different orders and different forms), and the transmission parameter is a modulation constellation. In each transmission, the input of the modulation constellation transmission parameter generator is a binary pseudorandom sequence with the length of P (the corresponding decimal pseudorandom number is Q) and a given and fixed initial modulation constellation, and the output is a transmission modulation constellation with the same order as the initial modulation constellation.
Fig. 4 is a schematic diagram of generating transmission parameters of a constellation modulation module according to an embodiment of the present invention (taking QPSK initial modulation constellation as an example), where the generation process of the transmission modulation constellation includes:
calculating M-Q mod 360;
and rotating all constellation points of the initial modulation constellation clockwise or anticlockwise by M degrees to obtain the modulation constellation transmitted at this time.
And 5: a transmission parameter generation method for an OFDM module.
The number of FFT transform points adopted in the OFDM module is T, and the transmission parameter is the subscript sequence of the selected subcarrier. In each transmission, the input of the OFDM transmission parameter generator is a binary pseudo-random sequence of length P (corresponding to a decimal pseudo-random number Q) and a given number of subcarriers t, and the output is a subcarrier index sequence of length t.
The generation process of the subcarrier index sequence comprises the following steps:
calculating V-Q mod T;
the subcarrier subscript sequence is [ (Vmod T), (V +1mod T), …, (V + T-1mod T) ].
Step 6: a transmission parameter generation method of a carrier frequency hopping module.
Based on a binary pseudorandom sequence with the length of P, the frequency hopping pattern is generated by adopting the existing method based on the chaos theory.
And 7: a transmission signal generating method.
According to the steps 1 to 6, transmission parameters of all signal processing modules can be generated, a complete signal processing flow of the transmission is formed based on the transmission parameters, the information source signal generates a sending signal after passing through a channel coding module, an interleaving module, a constellation modulation module, an OFDM module, a carrier frequency hopping module and other modules, and the transmission can be carried out through an antenna. The receiving end keeps the transmission parameters consistent with the transmitting end through the same pseudo code generator, and then the transmission information is recovered.
In the above process: on one hand, the transmission parameters of the signal processing function modules are different in each transmission, multi-dimensional safe transmission based on multiple modules is realized, and the safety is further improved. On the other hand, all the transmission parameters are produced based on the same pseudorandom series, so that the integrated joint design of multi-module transmission is realized, and the realization complexity is further reduced.
It should be noted that, in the embodiment of the present invention, the plurality of signal processing modules of the physical layer of the communication transceiving end include, but are not limited to, channel coding, interleaving, constellation modulation technology, OFDM, and carrier frequency hopping module involved in the present invention.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and those skilled in the art can make various modifications and changes. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
A second aspect of the present invention provides a physical layer secure transmission system 1 according to an embodiment of the present invention, as shown in fig. 5, including:
a pseudo-random sequence generator 10 for generating a pseudo-random sequence based on the clock information synchronized at the transmitting and receiving ends;
a transmission parameter generator 20 for determining transmission parameters of the respective signal processing modules based on the pseudo random sequence;
a transmit signal generator 30 for generating a transmit signal based on the plurality of signal processing modules having determined transmission parameters.
The physical layer safe transmission system is arranged at the signal sending end. The transmitting end is provided with a plurality of signal processing modules, and the transmission parameters of each signal processing module need to be generated based on the generated pseudo-random sequence in each transmission process. The source signal passes through the signal processing modules with determined transmission parameters in sequence, and then the transmission signal of the transmission can be generated.
By adopting the embodiment of the invention, an integrated multidimensional safe transmission method aiming at a plurality of functional modules can be realized. On one hand, the transmission parameters of the signal processing modules are different in each transmission, so that multi-dimensional safe transmission based on multiple modules is realized, and the safety is further improved; on the other hand, all the transmission parameters are produced based on the same pseudorandom series, so that the integrated joint design of multi-module transmission is realized, and the realization complexity is further reduced.
On the basis of the above-described embodiment, various modified embodiments are further proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the various modified embodiments.
According to some embodiments of the invention, the pseudo-random sequence generator 10 may be configured to:
and (3) generating a binary pseudorandom sequence with the length of n by using clock information synchronized with a transmitting end and a receiving end as a random seed and adopting a feedback shift register method.
According to some embodiments of the invention, the respective signal processing modules comprise: the device comprises a channel coding module, an interleaving module, a constellation modulation module, an OFDM module and a carrier frequency hopping module;
the channel coding module adopts a low-density parity check code, and the transmission parameter of the channel coding module is a binary check matrix with K rows and N columns;
the interleaving module adopts a block interleaver, and the transmission parameters of the interleaving module are the row number S1 and the column number S2 of the block interleaver;
the constellation modulation module adopts quadrature amplitude modulation or amplitude phase modulation, and the transmission parameter of the constellation modulation module is a modulation constellation;
the number of FFT transform points adopted by the OFDM module is T, and the transmission parameter of the OFDM module is the subscript sequence of the selected subcarrier;
the transmission parameter generator 20 includes:
a channel coding transmission parameter generator, configured to output a binary check matrix with K rows and N columns based on the pseudo-random sequence and a preset initial check matrix with K rows and N columns;
an interleaving transmission parameter generator for outputting the number of rows S1 and the number of columns S2 of a block interleaver based on the pseudo random sequence and a preset interleaving length S;
a modulation constellation transmission parameter generator, configured to output a transmission modulation constellation with the same order as the initial modulation constellation based on the pseudorandom sequence and a preset initial modulation constellation;
the OFDM transmission parameter generator is used for outputting a subcarrier subscript sequence with the length of t based on the pseudorandom sequence and the preset number of subcarriers t;
and the frequency hopping transmission parameter generator is used for generating frequency hopping patterns by adopting a method based on the chaos theory based on the pseudo random sequence.
Those skilled in the art will appreciate that the various modules or steps of the invention described above can be implemented using a general purpose computing device, that they can be centralized on a single computing device or distributed across a network of computing devices, and that they can alternatively be implemented using program code executable by a computing device, such that the steps illustrated and described herein can be performed by a computing device stored in a memory device and, in some cases, performed in an order different than that used herein, or separately fabricated into various integrated circuit modules, or multiple modules or steps thereof, and implemented as a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
An embodiment of a third aspect of the present invention provides a physical layer secure transmission apparatus, as shown in fig. 6, including: a memory 1010, a processor 1020 and a computer program stored on the memory 1010 and executable on the processor 1020, the computer program, when executed by the processor 1020, implementing the steps of the method as described in the first aspect embodiment above.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on this understanding, the technical solutions of the present invention may be embodied in the form of software products, which essentially or partially contribute to the prior art.
A fourth aspect of the present invention provides a computer-readable storage medium, on which an implementation program for information transmission is stored, where the program, when executed by a processor, implements the steps of the method according to the first aspect of the present invention.
It should be noted that the computer-readable storage medium in this embodiment includes, but is not limited to: ROM, RAM, magnetic or optical disks, and the like. The program can be a mobile phone, a computer, a server, an air conditioner, or a network device.
Although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. The particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. For example, in the claims, any of the claimed embodiments may be used in any combination.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Any reference signs placed between parentheses shall not be construed as limiting the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (10)
1. A physical layer secure transmission method, comprising:
generating a pseudo-random sequence based on the clock information of the synchronization of the transmitting and receiving ends;
determining transmission parameters of each signal processing module based on the pseudo-random sequence;
a transmit signal is generated based on the plurality of signal processing modules having determined transmission parameters.
2. The method of claim 1, wherein the generating of the pseudo random sequence based on the clock information synchronized at the transceiving end comprises:
the pseudo-random sequence generator takes the synchronous clock information of the receiving and transmitting ends as random seeds and adopts a feedback shift register method to generate a binary pseudo-random sequence with the length of n.
3. The method of claim 1, wherein the respective signal processing modules comprise: the device comprises a channel coding module, an interleaving module, a constellation modulation module, an OFDM module and a carrier frequency hopping module.
4. The method of claim 3, wherein the channel coding module uses a low density parity check code, and the transmission parameter of the channel coding module is a binary check matrix with a number of rows K and a number of columns N;
the interleaving module adopts a block interleaver, and the transmission parameters of the interleaving module are the row number S1 and the column number S2 of the block interleaver;
the constellation modulation module adopts quadrature amplitude modulation or amplitude phase modulation, and the transmission parameter of the constellation modulation module is a modulation constellation;
the number of FFT transform points adopted by the OFDM module is T, and the transmission parameter of the OFDM module is the subscript sequence of the selected subcarrier.
5. The method of claim 4, wherein determining transmission parameters for each signal processing module based on the pseudo-random sequence comprises:
inputting the pseudo-random sequence and a preset initial check matrix with K rows and N columns into a channel coding transmission parameter generator, and outputting a binary check matrix with K rows and N columns;
inputting the pseudo-random sequence and a preset interleaving length S into an interleaving transmission parameter generator to output the row number S1 and the column number S2 of a block interleaver;
inputting the pseudo-random sequence and a preset initial modulation constellation into a modulation constellation transmission parameter generator to output a transmission modulation constellation with the same order as the initial modulation constellation;
inputting the pseudo-random sequence and a preset subcarrier number t into an OFDM transmission parameter generator to output a subcarrier subscript sequence with the length of t;
and generating a frequency hopping pattern by adopting a method based on a chaos theory based on the pseudo-random sequence.
6. A physical layer secure transmission system, comprising:
the pseudo-random sequence generator is used for generating a pseudo-random sequence based on the synchronous clock information of the transmitting and receiving ends;
a transmission parameter generator for determining transmission parameters of the respective signal processing modules based on the pseudo random sequence;
a transmit signal generator for generating a transmit signal based on the plurality of signal processing modules having determined transmission parameters.
7. The system of claim 6, wherein the pseudo-random sequence generator is to:
and (3) generating a binary pseudorandom sequence with the length of n by using clock information synchronized with a transmitting end and a receiving end as a random seed and adopting a feedback shift register method.
8. The system of claim 6, wherein each signal processing module comprises: the device comprises a channel coding module, an interleaving module, a constellation modulation module, an OFDM module and a carrier frequency hopping module;
the channel coding module adopts a low-density parity check code, and the transmission parameter of the channel coding module is a binary check matrix with K rows and N columns;
the interleaving module adopts a block interleaver, and the transmission parameters of the interleaving module are the row number S1 and the column number S2 of the block interleaver;
the constellation modulation module adopts quadrature amplitude modulation or amplitude phase modulation, and the transmission parameter of the constellation modulation module is a modulation constellation;
the number of FFT transform points adopted by the OFDM module is T, and the transmission parameter of the OFDM module is the subscript sequence of the selected subcarrier;
the transmission parameter generator includes:
a channel coding transmission parameter generator, configured to output a binary check matrix with K rows and N columns based on the pseudo-random sequence and a preset initial check matrix with K rows and N columns;
an interleaving transmission parameter generator for outputting the number of rows S1 and the number of columns S2 of a block interleaver based on the pseudo random sequence and a preset interleaving length S;
a modulation constellation transmission parameter generator, configured to output a transmission modulation constellation with the same order as the initial modulation constellation based on the pseudorandom sequence and a preset initial modulation constellation;
the OFDM transmission parameter generator is used for outputting a subcarrier subscript sequence with the length of t based on the pseudorandom sequence and the preset number of subcarriers t;
and the frequency hopping transmission parameter generator is used for generating frequency hopping patterns by adopting a method based on the chaos theory based on the pseudo random sequence.
9. A physical layer secure transmission apparatus, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the physical layer secure transmission method of any of claims 1 to 5.
10. A computer-readable storage medium, on which an implementation program for information transfer is stored, which when executed by a processor implements the steps of the physical layer secure transmission method according to any one of claims 1 to 5.
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