CN117938262A - Digital data correction method, device and storage medium in visible light wireless optical communication - Google Patents
Digital data correction method, device and storage medium in visible light wireless optical communication Download PDFInfo
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- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
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Abstract
The application relates to a digital data correction method, a device and a storage medium in visible light wireless optical communication. Generating first test data according to a preset data format, wherein the first test data covers all communication forms corresponding to the preset data format; the first test data includes: a plurality of tuples; for each byte group, determining error-prone bytes of the current byte group according to preset standard data; obtaining second test data based on an approximation algorithm according to the error prone bytes, wherein the second test data comprises a plurality of byte groups containing error prone bytes, and the positions of the error prone bytes in each group are different; and detecting each byte group in the second test data, and determining the data format during data transmission. The method can solve the problem of data error or loss phenomenon in the receiving demodulation of the prior art.
Description
Technical Field
The application relates to the field of visible light optical communication, in particular to a method, a device and a storage medium for correcting digital data in visible light wireless optical communication.
Background
The visible light communication is to use visible light spectrum to carry out data wireless transmission technology, and the data information is loaded by modulating light so as to achieve the purpose of data wireless transmission.
The optical loading data is obtained by disassembling digital data according to bit, and superposing the disassembled digital data on visible light by modulation (OOK test or pulse test (PPM))
However, due to the optical characteristics and the debugging method, when consecutive identical bits or specific consecutive bit combinations occur, a deviation occurs in transmission, thereby causing a data error or loss phenomenon in reception and demodulation of data.
Disclosure of Invention
Aiming at the problems, the application aims to provide a digital data correction method, a device and a storage medium in visible light wireless optical communication, so as to avoid error codes and missing codes, thereby improving the data accuracy and the high efficiency of optical data transmission.
In a first aspect, an embodiment of the present application provides a method for correcting digital data in visible light wireless optical communication, including:
generating first test data according to a preset data format, wherein the first test data covers all communication forms corresponding to the preset data format; the first test data includes: a plurality of tuples;
for each byte group, determining error-prone bytes of the current byte group according to preset standard data;
Obtaining second test data based on an approximation algorithm according to the error prone bytes, wherein the second test data comprises a plurality of byte groups containing error prone bytes, and the positions of the error prone bytes in each group are different;
and detecting each byte group in the second test data, and determining the data format during data transmission.
Further, for each of the tuples, determining the error-prone byte of the current tuple according to the preset standard data includes:
Determining the number of bytes in error in the current byte group according to the standard data;
determining the error probability of the current byte group according to the number of bytes in error and the total number of bytes in the byte group;
and when the error probability is larger than a preset value, determining that the bytes in the current byte group are error-prone bytes.
Further, the obtaining second test data based on the approximation algorithm according to the error prone byte includes:
determining standard bytes, wherein the standard bytes are bytes which are free from errors in the transmission process;
And generating the second test data according to the error-prone byte and the standard byte.
Further, the detecting each byte group in the second test data, and determining a data format during data transmission, includes:
transmitting the second test data based on a visible light communication system;
detecting the error probability of each byte group in the received second test data according to the standard data;
and determining the data format during data transmission according to the error probability and the byte arrangement sequence of each byte group in the second test data.
Further, after detecting the error probability of the received second test data, the method further includes:
Determining third test data, wherein the third test data is second test data with the error probability larger than a preset value;
determining error prone bytes in the third test data;
keeping error-prone bytes in the third test data unchanged, and randomly changing other bytes in the third test data to obtain fourth test data;
And detecting the error probability of the fourth test data.
In a second aspect, an embodiment of the present application provides a digital data correction device in visible light wireless optical communication, including: the device comprises a data generation module, a data processing module and a determination module;
The data generation module is used for generating first test data according to a preset data format, and the first test data comprises: a plurality of tuples;
the data processing module is used for determining error-prone bytes of the current byte group according to preset standard data for each byte group; obtaining second test data based on an approximation algorithm according to the error prone bytes, wherein the second test data comprises a plurality of byte groups containing error prone bytes, and the positions of the error prone bytes in each group are different;
the determining module is used for detecting each byte group in the second test data and determining a data format during data transmission.
Further, the byte group comprises a plurality of bytes, and each byte group corresponds to one standard data;
The data processing module determines the number of bytes in error in the current byte group according to the standard data; determining the error probability of the current byte group according to the number of bytes in error and the total number of bytes in the byte group; and when the error probability is larger than a preset value, determining that the bytes in the current byte group are error-prone bytes.
Further, the data processing module is used for determining standard bytes, wherein the standard bytes are bytes which are free from errors in the transmission process; and generating the second test data according to the error-prone byte and the standard byte.
Further, the data processing module is used for sending the second test data based on a visible light communication system; detecting the error probability of each byte group in the received second test data according to the standard data; and determining the data format during data transmission according to the error probability and the byte arrangement sequence of each byte group in the second test data.
In a third aspect, an embodiment of the present application provides a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of a method for correcting digital data in visible light wireless optical communication provided in the first aspect of the present application.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects:
Verification is performed by determining all communication forms and determining bytes that are error prone. And then further detecting the influence of different positions of the error-prone byte in the byte group on the accuracy of information transmission, so that the error-prone byte can be conveniently selected according to the test result, and the data format which does not influence the accuracy of information transmission is convenient to select, thereby realizing the accuracy in data transmission.
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For a clearer description of one or more embodiments of the present description or of the solutions of the prior art, the drawings that are necessary for the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description that follow are only some of the embodiments described in the description, from which, for a person skilled in the art, other drawings can be obtained without inventive faculty.
Fig. 1 is a flow chart illustrating the use of a method for digital data correction in visible light wireless optical communication according to an exemplary embodiment.
Detailed Description
In order to enable a person skilled in the art to better understand the technical solutions in one or more embodiments of the present specification, the technical solutions in one or more embodiments of the present specification will be clearly and completely described below with reference to the drawings in one or more embodiments of the present specification, and it is obvious that the described embodiments are only some embodiments of the present specification, not all embodiments. All other embodiments, which can be made by one or more embodiments of the present disclosure without inventive faculty, are intended to be within the scope of the present disclosure.
The embodiment of the application provides a method for correcting digital data in visible light wireless optical communication, which is shown in fig. 1 and comprises the following steps:
step 1, generating first test data according to a preset data format.
In an embodiment of the present application, the first test data includes: a plurality of tuples, the number of tuples can be set according to the actual situation. The number of communication forms corresponding to different data formats is different, for example, when the system is 16 scale, the corresponding number of communication forms is 256;8, the corresponding number of communication forms 64. For ease of illustration, the present application will be described with respect to an 8-tuple 16 system. The tuples and their order form the data format at the time of data transmission, for example, tuple (0 x00,0x00 and byte group [ ],) and bytes group%; (0 x00 ) back up to(s) (-) -A/D0 xFF,0xFF back up to(s) (-) -A/D.
In addition, in order to improve the data transmission accuracy, the first test data of the present application includes all combinations of 8 tuples, 256 kinds in total, wherein the bytes in each tuple are identical, e.g., (0 x00 )/(0 x 00) 0xFF,0 xFF).
In an actual scenario, the first test data is generated as: after the signal generating end generates data, the generated data is sent to the signal receiving end, and the data received by the signal receiving end is the first test data.
And 2, determining error-prone bytes of the current byte group according to preset standard data for each byte group.
In the embodiment of the application, the byte group comprises a plurality of identical bytes, and each byte group corresponds to one standard data; determining the number of bytes in error in the current byte group according to the standard data; and determining the error probability of the current byte group according to the number of bytes in the error and the total number of bytes in the byte group. When the error probability is larger than a preset value, determining that the bytes in the current byte group are error-prone bytes. Since the bytes in each tuple are the same, there may be only one standard data for each tuple. For example, the number of the cells to be processed, byte group [ ], 0x00,0x00 standard data of 00). In the course of the data transmission process, tuple (0 x00,0x00 a byte in) may change, the error probability is thus the ratio of the number of bytes in error in the tuple to the total number of bytes, and its calculation formula is:
Where a n is a byte, x is standard data, and N is the total number of bytes. The operation logic is as follows: a n is the same as x, and the result shows that 0; a n is different from x and the result is noted as 1. The sum of the results is divided by the total number of bytes to obtain the error probability.
And step 3, obtaining second test data based on an approximation algorithm according to the error prone bytes.
In an embodiment of the present application, the second test data includes a plurality of byte groups including error prone bytes, and positions of the error prone bytes in each group are different. Determining standard bytes, wherein the standard bytes are bytes which are free from errors in the transmission process; determining error-prone bytes corresponding to the current byte group; and generating second test data according to the error-prone bytes and the standard bytes.
Specifically, during the signal transmission process, one part of the byte groups are not in error, and the other part of the byte groups are in error. This means that the byte group in which no error occurs, which contains bytes that are not easily erroneous in communication. And the bytes in which the error occurs are liable to be erroneous in communication. The application regards the bytes which are not easy to make mistakes as standard bytes and regards the bytes which are easy to make mistakes as error-prone bytes. And generates a new tuple using the standard byte and the error-prone byte. And then adjusting the positions of the error-prone bytes in the new tuples, so as to obtain a plurality of new tuples, namely second test data. The method for generating the second test data is an approximation algorithm, and the specific formula is as follows:
f(z)＝x&128＞＞p。
Where p.epsilon. (0, 8) decomposes each suspicious data into 8 byte values of response bits, & representation and operation, & gt is a right shift operator.
For example, the number of the cells to be processed, tuple A (0 x00,0x00 no errors are made), while byte group B (0 x10,0x01,0x 10) has an error during transmission, byte 00 is a standard byte and byte 10 is an error prone byte. Taking 8-byte group as an example, the second test data is ：(0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00),(0x00,0x10,0x00,0x00,0x00,0x00,0x00,0x00),(0x00,0x00,0x10,0x00,0x00,0x00,0x00,0x00),(0x00,0x00,0x00,0x10,0x00,0x00,0x00,0x00),(0x00,0x00,0x00,0x00,0x10,0x00,0x00,0x00),(0x00,0x00,0x00,0x00,0x00,0x10,0x00,0x00),(0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x00),(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x10).
And 4, detecting each byte group in the second test data and determining a data format during data transmission.
In the embodiment of the application, based on a visible light communication system, second test data are sent; detecting the error probability of each byte group of the received second test data according to the standard data; and determining the data format during data transmission according to the error probability and the byte arrangement sequence of each byte group in the second test data.
For example, the number of the cells to be processed, tuple C (0 x10,0x 00) tuple D (0 x00,0x10,0x 00) is correct after transmission, and tuple E (0 x00,0x10,0x 00), tuple F (0 x00,0x10,0x 00) is sent with an error. Then during normal communication, byte 10 would be modulated in byte order of tuples C and D while avoiding modulation in byte order of tuple E and tuple F. I.e. when byte 10 is present to be transmitted, byte 10 is transmitted in the data format of tuples C and D.
In order to further ensure the accuracy of error determination, in the embodiment of the application, third test data is determined, wherein the third test data is second test data with the error probability larger than a preset value; determining error prone bytes in the third test data; keeping error-prone bytes in the third test data unchanged, and randomly changing other bytes in the third test data to obtain fourth test data; the error probability of the fourth test data is detected.
For example, E (0 x00,0x10,0x 00) is the third test data, and the corresponding fourth test data may be: (0x10, 0x20,0x10,0x11,0x22,0x12,0x13, 0x14). And then detecting the error probability of the fourth test data, and determining whether other byte combinations are easy to make errors.
The computer readable storage medium has stored thereon a computer program which, when executed by one or more processors, implements a method of correcting digital data in visible light wireless optical communications as described in any of the previous embodiments.
The foregoing describes specific embodiments of the present disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can 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 are also possible or may be advantageous.
In the 30 s of the 20 th century, improvements to one technology could clearly be distinguished as improvements in hardware (e.g., improvements to circuit structures such as diodes, transistors, switches, etc.) or software (improvements to the process flow). However, with the development of technology, many improvements of the current method flows can be regarded as direct improvements of hardware circuit structures. Designers almost always obtain corresponding hardware circuit structures by programming improved method flows into hardware circuits. Therefore, an improvement of a method flow cannot be said to be realized by a hardware entity module. For example, a programmable logic device (Programmable Logic Device, PLD) (e.g., field programmable gate array (Field Programmable GATE ARRAY, FPGA)) is an integrated circuit whose logic functions are determined by user programming of the device. A designer programs to "integrate" a digital system onto a PLD without requiring the chip manufacturer to design and fabricate application-specific integrated circuit chips. Moreover, nowadays, instead of manually manufacturing integrated circuit chips, such programming is mostly implemented with "logic compiler (logic compiler)" software, which is similar to the software compiler used in program development and writing, and the original code before being compiled is also written in a specific programming language, which is called hardware description language (Hardware Description Language, HDL), but HDL is not just one, but a plurality of kinds, such as ABEL(Advanced Boolean Expression Language)、AHDL(Altera Hardware Description Language)、Confluence、CUPL(Cornell University Programming Language)、HDCal、JHDL(Java Hardware Description Language)、Lava、Lola、MyHDL、PALASM、RHDL(Ruby Hardware Description Language), and VHDL (Very-High-SPEED INTEGRATED Circuit Hardware Description Language) and Verilog are currently most commonly used. It will also be apparent to those skilled in the art that a hardware circuit implementing the logic method flow can be readily obtained by merely slightly programming the method flow into an integrated circuit using several of 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, application SPECIFIC INTEGRATED Circuits (ASICs), programmable logic controllers, and embedded microcontrollers, examples of controllers 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 of the memory. Those skilled in the art will also appreciate that, in addition to implementing the controller in a pure computer readable program code, it is well possible to implement the same functionality by logically programming the method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc. Such a controller may thus be regarded as a kind of hardware component, and means for performing various functions included therein may also be regarded as structures within the hardware component. Or even means for achieving the various functions may be regarded as either software modules implementing the methods or structures within hardware components.
The system, apparatus, module or unit set forth in the above embodiments may be implemented in particular by a computer chip or entity, or by a product having a certain function. One typical implementation is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smart phone, 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 functionally divided into various units, respectively. Of course, the functions of each unit may be implemented in the same piece or pieces of software and/or hardware when implementing the embodiments of the present specification.
One skilled in the relevant 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 present description can take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
The present description is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the specification. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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 one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media.
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 storage media for a computer 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, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
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 one … …" 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 specification 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.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing description is by way of example only and is not intended to limit the present disclosure. Various modifications and changes may occur to those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. that fall within the spirit and principles of the present document are intended to be included within the scope of the claims of the present document.
Claims (10)
1. A method for correcting digital data in visible light wireless optical communication, comprising:
generating first test data according to a preset data format, wherein the first test data covers all communication forms corresponding to the preset data format; the first test data includes: a plurality of tuples;
for each byte group, determining error-prone bytes of the current byte group according to preset standard data;
Obtaining second test data based on an approximation algorithm according to the error prone bytes, wherein the second test data comprises a plurality of byte groups containing error prone bytes, and the positions of the error prone bytes in each group are different;
and detecting each byte group in the second test data, and determining the data format during data transmission.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
The byte group comprises a plurality of identical bytes, and each byte group corresponds to one standard data;
for each byte group, determining the error-prone byte of the current byte group according to preset standard data, including:
Determining the number of bytes in error in the current byte group according to the standard data;
determining the error probability of the current byte group according to the number of bytes in error and the total number of bytes in the byte group;
and when the error probability is larger than a preset value, determining that the bytes in the current byte group are error-prone bytes.
3. The method of claim 1, wherein the step of determining the position of the substrate comprises,
And obtaining second test data based on an approximation algorithm according to the error prone byte, wherein the second test data comprises:
determining standard bytes, wherein the standard bytes are bytes which are free from errors in the transmission process;
And generating the second test data according to the error-prone byte and the standard byte.
4. The method of claim 3, wherein the step of,
The detecting each byte group in the second test data, determining a data format during data transmission, includes:
transmitting the second test data based on a visible light communication system;
detecting the error probability of each byte group in the received second test data according to the standard data;
and determining the data format during data transmission according to the error probability and the byte arrangement sequence of each byte group in the second test data.
5. A method according to claim 3, wherein after said detecting the error probability of the received second test data, the method further comprises:
Determining third test data, wherein the third test data is second test data with the error probability larger than a preset value;
determining error prone bytes in the third test data;
keeping error-prone bytes in the third test data unchanged, and randomly changing other bytes in the third test data to obtain fourth test data;
And detecting the error probability of the fourth test data.
6. A digital data correction device in visible light wireless optical communication, comprising: the device comprises a data generation module, a data processing module and a determination module;
The data generation module is used for generating first test data according to a preset data format, and the first test data comprises: a plurality of tuples;
the data processing module is used for determining error-prone bytes of the current byte group according to preset standard data for each byte group; obtaining second test data based on an approximation algorithm according to the error prone bytes, wherein the second test data comprises a plurality of byte groups containing error prone bytes, and the positions of the error prone bytes in each group are different;
the determining module is used for detecting each byte group in the second test data and determining a data format during data transmission.
7. The apparatus of claim 6, wherein the device comprises a plurality of sensors,
The byte group comprises a plurality of bytes, and each byte group corresponds to one standard data;
The data processing module determines the number of bytes in error in the current byte group according to the standard data; determining the error probability of the current byte group according to the number of bytes in error and the total number of bytes in the byte group; and when the error probability is larger than a preset value, determining that the bytes in the current byte group are error-prone bytes.
8. The apparatus of claim 6, wherein the device comprises a plurality of sensors,
The data processing module is used for determining standard bytes, wherein the standard bytes are bytes which are free from errors in the transmission process; and generating the second test data according to the error-prone byte and the standard byte.
9. The apparatus of claim 7, wherein the device comprises a plurality of sensors,
The data processing module is used for sending the second test data based on a visible light communication system; detecting the error probability of each byte group in the received second test data according to the standard data; and determining the data format during data transmission according to the error probability and the byte arrangement sequence of each byte group in the second test data.
10. A computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the steps of a method for correcting digital data in visible light wireless optical communication according to any one of claims 1 to 5.
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| US20020157044A1 (en) * | 2001-04-24 | 2002-10-24 | Byrd James M. | System and method for verifying error detection/correction logic |
| CN101297487A (en) * | 2005-10-28 | 2008-10-29 | 国际商业机器公司 | Modeling of a bursty channel |
| CN101435329A (en) * | 2008-12-08 | 2009-05-20 | 北京航空航天大学 | Error rate test system based on Bayes theorem |
| US20230089736A1 (en) * | 2021-09-21 | 2023-03-23 | Nvidia Corporation | Single-cycle byte correcting and multi-byte detecting error code |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20020157044A1 (en) * | 2001-04-24 | 2002-10-24 | Byrd James M. | System and method for verifying error detection/correction logic |
| CN101297487A (en) * | 2005-10-28 | 2008-10-29 | 国际商业机器公司 | Modeling of a bursty channel |
| CN101435329A (en) * | 2008-12-08 | 2009-05-20 | 北京航空航天大学 | Error rate test system based on Bayes theorem |
| US20230089736A1 (en) * | 2021-09-21 | 2023-03-23 | Nvidia Corporation | Single-cycle byte correcting and multi-byte detecting error code |
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