CN114268345A - Communication method and system based on differential frequency hopping - Google Patents
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Abstract
The invention discloses a communication method and a system based on differential frequency hopping, wherein the method comprises the following steps: determining a frequency difference coding mode and necessary communication parameters in communication through negotiation; when communication is carried out, according to the determined frequency difference coding mode and necessary communication parameters, a sender jumps according to frequency points corresponding to bit streams needing to be sent, and a receiver carries out difference value operation after detecting and recording communication frequency points and decodes the communication frequency points into the bit streams to finish communication. The invention can greatly reduce interference when the enemy tracks the interference and greatly enhance the communication effect of the own party.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a communication method and system based on differential frequency hopping.
Background
At the present stage, spread spectrum communication technology is developed rapidly, the spread spectrum communication technology is divided into frequency hopping spread spectrum, direct sequence spread spectrum and time hopping spread spectrum, in order to obtain better anti-interference effect in practical application, three spread spectrum modes are generally used in a mixed mode, and the development and application of differential frequency hopping are not widely applied.
At present, almost all spread spectrum communication systems are rarely used singly in three ways of frequency hopping spread spectrum, direct sequence spread spectrum and time hopping spread spectrum, and there are many interference methods for frequency hopping spread spectrum, one of which is to quickly detect and implement interference, generally called tracking interference, that is, when one party (party a) performs normal frequency hopping spread spectrum, it is interfered by a targeted communication frequency point of another party (party B), and the time and interval for implementing frequency detection and interference of party B are completely synchronous with the frequency hopping pattern of party a, so that information transmission (i.e. bit stream) performed by party a on the corresponding frequency point is interfered, and communication is damaged.
Disclosure of Invention
The present invention provides a communication method and system based on differential frequency hopping, and aims to solve the above problems in the prior art.
The invention provides a communication method based on differential frequency hopping, which comprises the following steps:
determining a frequency difference coding mode and necessary communication parameters in communication through negotiation;
when communication is carried out, according to the determined frequency difference coding mode and necessary communication parameters, a sender jumps according to frequency points corresponding to bit streams needing to be sent, and a receiver carries out difference value operation after detecting and recording communication frequency points and decodes the communication frequency points into the bit streams to finish communication.
The invention provides a communication system based on differential frequency hopping, which comprises:
a sending unit, configured to determine a frequency difference coding method and necessary communication parameters in communication through negotiation, and when performing communication, according to the determined frequency difference coding method and the necessary communication parameters, a sender performs hopping according to a frequency point corresponding to a bit stream to be sent;
and the receiving unit is used for determining a frequency difference coding mode and necessary communication parameters in communication by being matched with the sending unit through negotiation, and during communication, the receiving unit performs difference value operation after detecting and recording communication frequency points and decodes the communication frequency points into bit streams to finish communication.
By adopting the embodiment of the invention, the technical system of tracking interference is completely broken through, and as no bit information is carried on the frequency point during communication, the interference can be greatly reduced when the enemy carries out the tracking interference, and the communication effect of the own party is greatly enhanced.
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
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a communication method based on differential frequency hopping according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a communication system based on differential frequency hopping according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Method embodiment
According to an embodiment of the present invention, a communication method based on differential frequency hopping is provided, fig. 1 is a flowchart of the communication method based on differential frequency hopping according to the embodiment of the present invention, and as shown in fig. 1, the communication method based on differential frequency hopping according to the embodiment of the present invention specifically includes:
step 101, determining a frequency difference coding mode and necessary communication parameters in communication through negotiation; the frequency difference encoding method specifically includes: the method specifically comprises the following steps of non-linear coding and linear coding, wherein the linear coding specifically comprises the following steps: sparse coding and dense coding; the communication parameters specifically include: reference frequency, synchronization time and synchronization code.
And 102, when communication is carried out, according to the determined frequency difference coding mode and the necessary communication parameters, a sender jumps according to frequency points corresponding to bit streams to be sent, and a receiver carries out difference value operation after detecting and recording communication frequency points and decodes the communication frequency points into the bit streams to finish communication.
In step 102, the step of the sender hopping according to the frequency point corresponding to the bit stream to be sent specifically includes:
carrying out sparse coding: using a certain frequency point determined according to a pseudo-random code generated by a system as a reference, coding the frequency point of the next communication to be 1 or 0 when the frequency point is higher than the current frequency point, and coding the frequency point of the next communication to be 0 or 1 when the frequency point is lower than the current frequency point, and calculating the frequency point corresponding to a certain bit in a bit stream according to a transmission information code sequence according to a formula 1:
wherein, Y represents the frequency point corresponding to a bit, X is the reference frequency point, n represents the frequency point interval number, k represents the minimum frequency point interval, XiThe value corresponding to the ith bit is represented, if the value is 0, the value is-1, and if the value is 1, the value is + 1.
Carrying out dense coding: the method comprises the steps of taking a certain frequency point determined according to a pseudo-random code generated by a system as a reference, segmenting information bits needing to be transmitted, replacing information bit streams 0 and 1 by 16-system numbers, namely from 00 to ff, wherein the 16-system number 00 indicates that a next transmission frequency point is adjacent to the next transmission frequency point, the 16-system number ff indicates that the next frequency point is 255 multiplied by the minimum frequency point interval from a reference frequency point, determining the length of the segment to be n, and the minimum interval of the segmented frequency points is the minimum frequency point interval of the communication system and the maximum interval is (2n-1) multiplied by the minimum frequency point interval.
Carrying out nonlinear coding: and under the condition that the frequency difference value and the frequency point interval are not in a linear relation, carrying out coding by convolutional coding or by using a frequency point corresponding to the pseudo-random code or a preset corresponding relation between the frequency point and a code word.
The above-described technical means of the embodiments of the present invention will be described in detail below.
The first step, the two communication parties negotiate the adopted frequency difference coding mode (namely the sparse coding and the dense coding in the key points), the reference frequency (the jump-off frequency during communication is determined by the random sequence of the system and is set according to the agreement of the two communication parties), the synchronization time (the shortest time from the communication incapability to the communication availability before the communication of the system), the synchronization code (the identification sequence used by the system for synchronization) and the like;
and secondly, when the two parties can normally communicate, the two parties can communicate according to a frequency difference coding mode, the sender jumps according to the frequency point corresponding to the bit stream to be sent, and the receiver performs difference value operation after detecting and recording the communication frequency point and decodes the communication frequency point into the bit stream, so that the communication is finished.
1. Fast switching transmission frequency point
The two communication parties only transmit the frequency point and do not transmit bit information on the frequency point, so that the residence time of the waveform on the communication frequency point can be very short during communication.
2. Encoding frequency difference (i.e. differential frequency hopping coding, which can be divided into linear coding and nonlinear coding)
Linear coding of frequency difference coding can be divided into two forms of dense coding and sparse coding. Sparse coding: the frequency point determined by the pseudo random code generated by the system is used as a reference, the next communication frequency point is higher than the current frequency point and is coded as 1 (or 0), and the next communication frequency point is lower than the current frequency point and is coded as 0 (or 1, the rule corresponds to the previous rule). For example, the minimum interval of communication frequency points of a certain communication device is 100KHz, the starting frequency of communication is 100MHz, and the terminating frequency is 200 MHz; the reference frequency point of a certain communication is 120MHz, the minimum interval is 100KHz, the information to be transmitted is 010011100, and the frequency point of the communication should be: 120, 119.9, 120, 119.9, 119.8, 119.9, 120, 120.1, 120, in MHz. When the reference frequency point of a certain communication is 120MHz, the minimum interval is nx100 KHz, and the information to be transmitted is 010011100, the frequency point of the communication should be: 120, 120-nx0.1, 120, 120+ nx0.1, 120, in MHz. According to the transmission information code sequence, the frequency point corresponding to a certain bit can be calculated as:
wherein Y represents a frequency point corresponding to a certain bit, X is a reference frequency point, n represents the frequency point interval number, k represents the minimum frequency point interval, xi represents a value corresponding to the ith bit, and if the value is 0, the value is-1, and if the value is 1, the value is + 1.
Dense coding: a certain frequency point determined by a pseudo random code generated by the system is used as a reference, information bits to be transmitted are segmented, for example, 8 bits are a segment, then information bit streams 0 and 1 can be replaced by 16-system numbers, namely, from 00 to ff (binary numbers are 000000000000 to 11111111111), if the information bit stream is a 16-system number 00, the next transmission frequency point is adjacent to the transmission frequency point, and if the information bit stream is a 16-system number ff, the next frequency point is 255 × the minimum frequency point interval from the reference frequency point. The bit stream is segmented randomly, the length of the segment can be counted as n, the minimum interval of the frequency points after segmentation is the minimum frequency point interval of the communication system, and the maximum interval is (2n-1) multiplied by the minimum frequency point interval.
It is obvious that the communication efficiency of dense coding is high when the frequency hopping rates are the same in the two modes.
The non-linear coding of the frequency difference coding, namely the frequency difference and the frequency point interval are not in a linear relation, can be coded by the corresponding relation of frequency points and code words which is subjected to the convolutional coding or is randomly specified by utilizing the frequency points corresponding to pseudo-random codes or artificially in advance.
In summary, in the embodiments of the present invention, for tracking interference in a frequency hopping communication process, party a does not transmit bit information when communicating on a frequency hopping communication frequency point, only transmits frequency point information, and communicates by using a difference between a front frequency point and a rear frequency point, and only needs to encode by using a difference between two adjacent frequency points when communicating. Namely, the embodiment of the invention can identify the difference between two adjacent frequency points according to the two parties in communication and encode the frequency difference. The method for transmitting information by means of the difference value of the communication frequency points completely breaks through the technical system of tracking interference, and the frequency points do not carry bit information during communication, so that an enemy can not interfere during tracking interference, and the communication effect of the enemy can be enhanced.
System embodiment
According to an embodiment of the present invention, a communication system based on differential frequency hopping is provided, fig. 2 is a schematic diagram of the communication system based on differential frequency hopping according to the embodiment of the present invention, and as shown in fig. 2, the communication system based on differential frequency hopping according to the embodiment of the present invention specifically includes:
a sending unit 20, configured to determine a frequency difference coding method and necessary communication parameters in communication through negotiation, and when performing communication, according to the determined frequency difference coding method and the necessary communication parameters, a sender performs hopping according to a frequency point corresponding to a bit stream to be sent; the frequency difference encoding method specifically includes: the method specifically comprises the following steps of non-linear coding and linear coding, wherein the linear coding specifically comprises the following steps: sparse coding and dense coding; the communication parameters specifically include: reference frequency, synchronization time and synchronization code.
The sending unit 20 is specifically configured to:
carrying out sparse coding: using a certain frequency point determined according to a pseudo-random code generated by a system as a reference, coding the frequency point of the next communication to be 1 or 0 when the frequency point is higher than the current frequency point, and coding the frequency point of the next communication to be 0 or 1 when the frequency point is lower than the current frequency point, and calculating the frequency point corresponding to a certain bit in a bit stream according to a transmission information code sequence according to a formula 1:
wherein, Y represents the frequency point corresponding to a bit, X is the reference frequency point, n represents the frequency point interval number, k represents the minimum frequency point interval, XiThe value corresponding to the ith bit is represented, if the value is 0, the value is-1, and if the value is 1, the value is + 1.
Carrying out dense coding: the method comprises the steps of taking a certain frequency point determined according to a pseudo-random code generated by a system as a reference, segmenting information bits needing to be transmitted, replacing information bit streams 0 and 1 by 16-system numbers, namely from 00 to ff, wherein the 16-system number 00 indicates that a next transmission frequency point is adjacent to the next transmission frequency point, the 16-system number ff indicates that the next frequency point is 255 multiplied by the minimum frequency point interval from a reference frequency point, determining the length of the segment to be n, and the minimum interval of the segmented frequency points is the minimum frequency point interval of the communication system and the maximum interval is (2n-1) multiplied by the minimum frequency point interval.
Carrying out nonlinear coding: and under the condition that the frequency difference value and the frequency point interval are not in a linear relation, carrying out coding by convolutional coding or by using a frequency point corresponding to the pseudo-random code or a preset corresponding relation between the frequency point and a code word.
And the receiving unit 22 is used for determining a frequency difference coding mode and necessary communication parameters in communication through negotiation in cooperation with the sending unit, detecting and recording communication frequency points and then performing difference value operation during communication, and decoding the communication frequency points into bit streams to finish communication.
The embodiment of the present invention is a system embodiment corresponding to the above method embodiment, and specific operations of each module may be understood with reference to the description of the method embodiment, which is not described herein again.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
In the 30 s of the 20 th century, improvements in a technology could clearly be distinguished between improvements in hardware (e.g., improvements in circuit structures such as diodes, transistors, switches, etc.) and improvements in software (improvements in process flow). However, as technology advances, many of today's process flow improvements have been seen as direct improvements in hardware circuit architecture. Designers almost always obtain the corresponding hardware circuit structure by programming an improved method flow into the hardware circuit. Thus, it cannot be said that an improvement in the process flow cannot be realized by hardware physical modules. For example, a Programmable Logic Device (PLD), such as a Field Programmable Gate Array (FPGA), is an integrated circuit whose Logic functions are determined by programming the Device by a user. A digital system is "integrated" on a PLD by the designer's own programming without requiring the chip manufacturer to design and fabricate application-specific integrated circuit chips. Furthermore, nowadays, instead of manually making an Integrated Circuit chip, such Programming is often implemented by "logic compiler" software, which is similar to a software compiler used in program development and writing, but the original code before compiling is also written by a specific Programming Language, which is called Hardware Description Language (HDL), and HDL is not only one but many, such as abel (advanced Boolean Expression Language), ahdl (alternate Hardware Description Language), traffic, pl (core universal Programming Language), HDCal (jhdware Description Language), lang, Lola, HDL, laspam, hardward Description Language (vhr Description Language), vhal (Hardware Description Language), and vhigh-Language, which are currently used in most common. It will also be apparent to those skilled in the art that hardware circuitry that implements the logical method flows can be readily obtained by merely slightly programming the method flows into an integrated circuit using the hardware description languages described above.
The controller may be implemented in any suitable manner, for example, the controller may take the form of, for example, a microprocessor or processor and a computer-readable medium storing computer-readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, an Application Specific Integrated Circuit (ASIC), a programmable logic controller, and an embedded microcontroller, examples of which include, but are not limited to, the following microcontrollers: ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20, and Silicone Labs C8051F320, the memory controller may also be implemented as part of the control logic for the memory. Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may thus be considered a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.
The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. One typical implementation device is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functions of the units may be implemented in the same software and/or hardware or in multiple software and/or hardware when implementing the embodiments of the present description.
One skilled in the art will recognize that one or more embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, one or more embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the description may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The description has been presented with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the description. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that 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.
One or more embodiments of the present description may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. One or more embodiments of the specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of this document and is not intended to limit this document. Various modifications and changes may occur to those skilled in the art from this document. Any modifications, equivalents, improvements, etc. which come within the spirit and principle of the disclosure are intended to be included within the scope of the claims of this document.
Claims (10)
1. A communication method based on differential frequency hopping, comprising:
determining a frequency difference coding mode and necessary communication parameters in communication through negotiation;
when communication is carried out, according to the determined frequency difference coding mode and necessary communication parameters, a sender jumps according to frequency points corresponding to bit streams needing to be sent, and a receiver carries out difference value operation after detecting and recording communication frequency points and decodes the communication frequency points into the bit streams to finish communication.
2. The method of claim 1,
the frequency difference encoding method specifically includes: the method specifically comprises the following steps of non-linear coding and linear coding, wherein the linear coding specifically comprises the following steps: sparse coding and dense coding;
the communication parameters specifically include: reference frequency, synchronization time and synchronization code.
3. The method of claim 2, wherein the step of hopping the frequency points corresponding to the bit streams to be transmitted by the transmitter specifically comprises:
carrying out sparse coding: using a certain frequency point determined according to a pseudo-random code generated by a system as a reference, coding the frequency point of the next communication to be 1 or 0 when the frequency point is higher than the current frequency point, and coding the frequency point of the next communication to be 0 or 1 when the frequency point is lower than the current frequency point, and calculating the frequency point corresponding to a certain bit in a bit stream according to a transmission information code sequence according to a formula 1:
wherein, Y represents the frequency point corresponding to a bit, X is the reference frequency point, n represents the frequency point interval number, k represents the minimum frequency point interval, XiThe value corresponding to the ith bit is represented, if the value is 0, the value is-1, and if the value is 1, the value is + 1.
4. The method of claim 2, wherein the step of hopping the frequency points corresponding to the bit streams to be transmitted by the transmitter specifically comprises:
carrying out dense coding: the method comprises the steps of taking a certain frequency point determined according to a pseudo-random code generated by a system as a reference, segmenting information bits needing to be transmitted, replacing information bit streams 0 and 1 by 16-system numbers, namely from 00 to ff, wherein the 16-system number 00 indicates that a next transmission frequency point is adjacent to the next transmission frequency point, the 16-system number ff indicates that the next frequency point is 255 multiplied by the minimum frequency point interval from a reference frequency point, determining the length of the segment to be n, and the minimum interval of the segmented frequency points is the minimum frequency point interval of the communication system and the maximum interval is (2n-1) multiplied by the minimum frequency point interval.
5. The method of claim 2, wherein the step of hopping the frequency points corresponding to the bit streams to be transmitted by the transmitter specifically comprises:
carrying out nonlinear coding: and under the condition that the frequency difference value and the frequency point interval are not in a linear relation, carrying out coding by convolutional coding or by using a frequency point corresponding to the pseudo-random code or a preset corresponding relation between the frequency point and a code word.
6. A differential frequency hopping based communication system, comprising:
a sending unit, configured to determine a frequency difference coding method and necessary communication parameters in communication through negotiation, and when performing communication, according to the determined frequency difference coding method and the necessary communication parameters, a sender performs hopping according to a frequency point corresponding to a bit stream to be sent;
and the receiving unit is used for determining a frequency difference coding mode and necessary communication parameters in communication by being matched with the sending unit through negotiation, and during communication, the receiving unit performs difference value operation after detecting and recording communication frequency points and decodes the communication frequency points into bit streams to finish communication.
7. The system of claim 6,
the frequency difference encoding method specifically includes: the method specifically comprises the following steps of non-linear coding and linear coding, wherein the linear coding specifically comprises the following steps: sparse coding and dense coding;
the communication parameters specifically include: reference frequency, synchronization time and synchronization code.
8. The system of claim 7, wherein the sending unit is specifically configured to:
carrying out sparse coding: using a certain frequency point determined according to a pseudo-random code generated by a system as a reference, coding the frequency point of the next communication to be 1 or 0 when the frequency point is higher than the current frequency point, and coding the frequency point of the next communication to be 0 or 1 when the frequency point is lower than the current frequency point, and calculating the frequency point corresponding to a certain bit in a bit stream according to a transmission information code sequence according to a formula 1:
wherein, Y represents the frequency point corresponding to a bit, X is the reference frequency point, n represents the frequency point interval number, k represents the minimum frequency point interval, XiThe value corresponding to the ith bit is represented, if the value is 0, the value is-1, and if the value is 1, the value is + 1.
9. The system of claim 7, wherein the sending unit is specifically configured to:
carrying out dense coding: the method comprises the steps of taking a certain frequency point determined according to a pseudo-random code generated by a system as a reference, segmenting information bits needing to be transmitted, replacing information bit streams 0 and 1 by 16-system numbers, namely from 00 to ff, wherein the 16-system number 00 indicates that a next transmission frequency point is adjacent to the next transmission frequency point, the 16-system number ff indicates that the next frequency point is 255 multiplied by the minimum frequency point interval from a reference frequency point, determining the length of the segment to be n, and the minimum interval of the segmented frequency points is the minimum frequency point interval of the communication system and the maximum interval is (2n-1) multiplied by the minimum frequency point interval.
10. The system of claim 7, wherein the sending unit is specifically configured to:
carrying out nonlinear coding: and under the condition that the frequency difference value and the frequency point interval are not in a linear relation, carrying out coding by convolutional coding or by using a frequency point corresponding to the pseudo-random code or a preset corresponding relation between the frequency point and a code word.
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| CN106160815A (en) * | 2016-06-15 | 2016-11-23 | 西北工业大学 | Non-orthogonal multiple cut-in method based on space-time frequency code saltus step |
| CN110266355A (en) * | 2019-06-20 | 2019-09-20 | 青岛博展智能科技有限公司 | A kind of compressed sensing based communication system, communication means and device |
| CN111131112A (en) * | 2019-12-23 | 2020-05-08 | 航天恒星科技有限公司 | Novel differential frequency hopping wireless communication framework based on DPSK |
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| CN102611470A (en) * | 2012-03-14 | 2012-07-25 | 桂林电子科技大学 | Anti-interference receiving machine in differential frequency hopping communication system and operation method of anti-interference receiving machine |
| CN106160815A (en) * | 2016-06-15 | 2016-11-23 | 西北工业大学 | Non-orthogonal multiple cut-in method based on space-time frequency code saltus step |
| CN110266355A (en) * | 2019-06-20 | 2019-09-20 | 青岛博展智能科技有限公司 | A kind of compressed sensing based communication system, communication means and device |
| CN111131112A (en) * | 2019-12-23 | 2020-05-08 | 航天恒星科技有限公司 | Novel differential frequency hopping wireless communication framework based on DPSK |
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