CN116094653A - Molecular diffusion communication method, system and storage medium - Google Patents

Abstract

The invention discloses a molecular diffusion communication method, system and storage medium, which are applied in the technical field of communication, can effectively reduce the bit error rate of the molecular diffusion communication, and improve the reliability of the molecular diffusion communication. The method includes: obtaining the first information sequence to be sent; encoding the first information sequence by a preset Solomon coding algorithm to obtain coded data; modulating the coded data by a preset modulation algorithm to obtain modulated data; inputting the modulated data The molecular diffusion channel is used for transmission; the modulated data transmitted by the molecular diffusion channel is obtained, and the modulated data is input into the intersymbol crosstalk filter for filtering to obtain the filtered data; the filtered data is demodulated by the preset demodulation algorithm to obtain the demodulated data; It is assumed that the demodulation algorithm corresponds to the preset modulation algorithm; the demodulated data is decoded by the preset Solomon decoding algorithm to obtain the second information sequence; the preset Solomon decoding algorithm corresponds to the preset Solomon encoding algorithm.

Description

Molecular diffusion communication method, system and storage medium

technical field

The present invention relates to the technical field of communication, in particular to a molecular diffusion communication method, system and storage medium.

Background technique

With the continuous vigorous development of 5G communication technology, traditional communication has been seen everywhere in people's lives, and the development of traditional communication is becoming more and more mature and growing, which provides great convenience for people's production and life. However, traditional communication has its limitations. For the microscopic network communication level, traditional communication is limited by the liquid environment or the complex communication situation composed of cell structures and tissues and organs, which makes traditional communication unable to be carried out effectively. With the development of technologies such as nanotechnology and bioengineering, it is now possible to use biological materials to manufacture micron or nanoscale machines. This type of machine has some advantages such as small size, good biocompatibility, and high energy efficiency, so it can be used nanomachines for information transfer. At the microscopic level, nano-networks mainly use nano-magnetic communication and molecular communication. Molecular communication is currently a new communication method, which mainly uses biochemical molecules and some tiny particles as information carriers to transmit signals in a fluid environment for communication. Molecular communication has a wide range of applications. However, in related technologies, when molecules transmit information, they will be affected by inter-symbol crosstalk and multi-user interference in the molecular communication process. The bit error rate of transmission is high and the communication reliability is low.

Contents of the invention

In order to solve at least one of the above technical problems, the present invention proposes a molecular diffusion communication method, system and storage medium, which can effectively reduce the bit error rate of molecular diffusion communication and improve the reliability of molecular diffusion communication.

On the one hand, an embodiment of the present invention provides a molecular diffusion communication method, including the following steps:

Obtain the first information sequence to be sent;

Encoding the first information sequence by using a preset Solomon encoding algorithm to obtain encoded data;

Modulating the coded data through a preset modulation algorithm to obtain modulated data;

inputting the modulation data into a molecular diffusion channel for transmission;

Obtaining modulation data transmitted by the molecular diffusion channel, inputting the modulation data into an intersymbol crosstalk filter for filtering, and obtaining filtered data;

demodulating the filtered data through a preset demodulation algorithm to obtain demodulated data; wherein the preset demodulation algorithm corresponds to the preset modulation algorithm;

The demodulated data is decoded by using a preset Solomon decoding algorithm to obtain a second information sequence; wherein, the preset Solomon decoding algorithm corresponds to the preset Solomon encoding algorithm.

A molecular diffusion communication method according to an embodiment of the present invention has at least the following beneficial effects: In this embodiment, firstly, the first information sequence to be sent is acquired at the sending end, and encoded by a preset Solomon encoding algorithm to obtain encoded data. Next, in this embodiment, the obtained encoded data is modulated by a preset modulation algorithm to obtain modulated data, and the obtained modulated data is input into the molecular diffusion channel for transmission. At the same time, in this embodiment, the modulated data transmitted through the molecular diffusion channel is obtained at the receiving end, and input to an intersymbol crosstalk filter for filtering, so as to alleviate the intersymbol crosstalk problem in the molecular diffusion communication process. Then, in this embodiment, the filtered data obtained after filtering is demodulated by using a demodulation algorithm corresponding to the preset modulation algorithm, that is, the preset demodulation algorithm, to obtain demodulated data. Further, in this embodiment, the demodulated data is decoded by a preset Solomon decoding algorithm, so as to obtain the second information sequence, and realize molecular diffusion communication. Moreover, in this embodiment, by performing preset Solomon codec and preset modulation and demodulation operations on the information sequence, the bit error problem in the molecular diffusion communication process is effectively alleviated, the bit error rate of the molecular diffusion communication is effectively reduced, and the molecular diffusion communication is improved. reliability.

According to some embodiments of the present invention, the preset Solomon coding algorithm includes a truncated Solomon coding algorithm;

The encoding of the first information sequence by using a preset Solomon encoding algorithm to obtain encoded data includes:

It is determined that the number of data symbols of the first information sequence is less than the preset number of symbols, and performing a zero symbol padding operation on the first information sequence to obtain a third information sequence; wherein, the first information sequence is filled by the zero symbol padding operation The number of symbols of an information sequence is supplemented to the preset number of symbols;

performing Solomon encoding on the third information sequence to obtain encoded intermediate data;

Performing a truncation operation on the encoded intermediate data to obtain the encoded data; wherein, the truncation operation truncates zero symbols filled by the zero symbol filling operation.

According to some embodiments of the present invention, the preset Solomon decoding algorithm includes a truncated Solomon decoding algorithm;

Before performing the step of decoding the demodulated data by using a preset Solomon decoding algorithm to obtain a second information sequence, the method further includes:

obtaining the number of truncated bits in said mediation data;

constructing truncated decoding coefficients according to the truncated bits;

An error localization polynomial and an error evaluation polynomial are constructed from the truncated decoding coefficients.

According to some embodiments of the present invention, the decoding of the demodulated data by using a preset Solomon decoding algorithm to obtain a second information sequence includes:

Inputting the demodulated data into a syndrome calculation module to calculate a syndrome;

Perform bit error correction according to the syndrome, the error location polynomial, and the error evaluation polynomial to obtain the second information sequence.

According to some embodiments of the present invention, the preset modulation algorithm includes a binary concentration shift keying modulation algorithm;

The said coded data is modulated by a preset modulation algorithm to obtain modulated data, including:

The coded data is modulated by the binary concentration shift keying modulation algorithm to obtain the modulated data.

According to some embodiments of the present invention, the preset demodulation algorithm includes a binary concentration shift keying demodulation algorithm;

The demodulation of the filtered data by using a preset demodulation algorithm to obtain demodulated data includes:

Demodulate the filtered data by using the binary concentration shift keying demodulation algorithm to obtain the demodulated data.

According to some embodiments of the present invention, performing bit error correction according to the syndrome, the error location polynomial and the error evaluation polynomial to obtain the second information sequence includes:

calculating by chien search algorithm according to the syndrome and the error location polynomial to obtain error location data;

performing error value calculation according to the syndrome and the error evaluation polynomial to obtain error value data;

Performing codeword correction according to the error position data and the error value data to obtain the second information sequence.

On the other hand, an embodiment of the present invention also provides a molecular diffusion communication system, including:

A data acquisition module, configured to acquire the first information sequence to be sent;

An encoding module, configured to encode the first information sequence by using a preset Solomon encoding algorithm to obtain encoded data;

a modulation module, configured to modulate the coded data through a preset modulation algorithm to obtain modulated data;

a transmission module, configured to input the modulation data into the molecular diffusion channel for transmission;

A filtering module, configured to acquire modulation data transmitted by the molecular diffusion channel, input the modulation data into an intersymbol crosstalk filter for filtering, and obtain filtered data;

A demodulation module, configured to demodulate the filtered data through a preset demodulation algorithm to obtain demodulated data; wherein, the preset demodulation algorithm corresponds to the preset modulation algorithm;

The decoding module is configured to decode the demodulated data by using a preset Solomon decoding algorithm to obtain a second information sequence; wherein, the preset Solomon decoding algorithm corresponds to the preset Solomon encoding algorithm.

On the other hand, an embodiment of the present invention also provides a molecular diffusion communication system, including:

at least one processor;

at least one memory for storing at least one program;

When the at least one program is executed by the at least one processor, the at least one processor implements the molecular diffusion communication method as described in the foregoing embodiments.

On the other hand, an embodiment of the present invention also provides a computer storage medium, which stores a processor-executable program, and the processor-executable program is used to implement the above-mentioned embodiments when executed by the processor. The molecular diffusion communication method.

Description of drawings

FIG. 1 is a flowchart of a molecular diffusion communication method provided by an embodiment of the present invention;

Fig. 2 is a functional block diagram of a molecular diffusion communication system provided by an embodiment of the present invention.

Detailed ways

The embodiments described in the embodiments of the present application should not be regarded as limiting the present application, and all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

In the following description, references to "some embodiments" describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or a different subset of all possible embodiments, and Can be combined with each other without conflict.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application, and are not intended to limit the present application.

Before introducing and describing the embodiments of the present application, the relevant terms involved in the present application are firstly explained.

Molecular communication: It mainly uses biochemical molecules and some tiny particles as information carriers to communicate purely as signals in a fluid environment, which is a new communication method. This type of communication can realize communication on the nanometer scale due to the smaller and more flexible message carrier used. It has some obvious advantages in some specific environments such as pipelines and salt water environments, and can obtain expected effects and higher energy efficiency that traditional communications cannot obtain. According to the different propagation modes of molecules in the fluid environment, molecular communication is divided into trajectory-based transmission, flow-based transmission, and molecular diffusion-based transmission. Among them, the transmission method based on motion estimation can also adopt active transmission methods such as molecular motors or viruses and bacteria. Based on the way of flow transmission, information molecules mainly transmit information through diffusion in the fluid medium during the transmission process, and the direction of flow transmission is relatively certain, and it is transmitted to the destination. For communication based on diffusion transmission, the message carriers used are biochemical molecules, which use the chemical energy generated by the activities of biochemical molecules to perform tasks.

Solomon (Reed-Solomon, RS) coding: It is a kind of forward error correction channel coding. The coding process first seeks redundancy for polynomials at multiple points, and then transmits or stores them. When the receiver receives enough points correctly, it can restore the original polynomial, even if many points on the received polynomial are distorted by noise.

Molecular diffusion communication is an image mode in which biochemical molecules are used as information carriers and then transmitted by Brownian motion free diffusion. However, during the communication process of the molecules, the molecules arriving in the current time slot will receive the molecules arriving in the previous time slot in addition to the molecules that should have been received, causing interference to them, that is, inter-symbol crosstalk. Due to the influence of intersymbol crosstalk, the bit error rate of transmission is also high, resulting in low reliability of molecular diffusion communication.

Based on this, an embodiment of the present invention provides a molecular diffusion communication method, system and storage medium, which can effectively reduce the bit error rate of molecular diffusion communication and improve the reliability of molecular diffusion communication. Referring to FIG. 1 , the method in this embodiment of the present invention includes but is not limited to step S110 , step S120 , step S130 , step S140 , step S150 , step S160 and step S170 .

Specifically, the method application process of the embodiment of the present invention includes but is not limited to the following steps:

S110: Acquire a first information sequence to be sent.

S120: Encode the first information sequence by using a preset Solomon encoding algorithm to obtain encoded data.

S130: Modulate the coded data by using a preset modulation algorithm to obtain modulated data.

S140: Input the modulation data into the molecular diffusion channel for transmission.

S150: Obtain modulation data transmitted by the molecular diffusion channel, input the modulation data into an intersymbol crosstalk filter for filtering, and obtain filtered data.

S160: Demodulate the filtered data by using a preset demodulation algorithm to obtain demodulated data. Wherein, the preset demodulation algorithm corresponds to the preset modulation algorithm.

S170: Decode the demodulated data by using a preset Solomon decoding algorithm to obtain a second information sequence. Wherein, the preset Solomon decoding algorithm corresponds to the preset Solomon encoding algorithm.

In this specific embodiment, this embodiment first acquires data information to be sent at the information sending end, that is, the first information sequence. Then, in this embodiment, a preset Solomon encoding algorithm is used to encode the first information sequence to obtain encoded data. In the molecular diffusion communication system, since the molecular movement is random, it is greatly disturbed. Therefore, in this embodiment, the preset Solomon coding algorithm is added to the molecular diffusion communication system to alleviate the code caused by the random molecular movement. crosstalk problem. Next, in this embodiment, the coded data is modulated by using a preset modulation algorithm to obtain modulated data. For example, the preset modulation algorithm in this embodiment includes concentration shift keying modulation algorithm (Concentration Shift Keying, CSK), molecular frequency shift modulation algorithm (Molecular Frequency Shift Keying, MFSK), molecular shift keying modulation (Molecule Shift Keying , MoSK) and ratio shift keying modulation algorithm (Ratio Shift Keying, RSK). In this embodiment, the encoded data is modulated by a preset modulation algorithm to obtain corresponding modulated data, and then the obtained modulated data is input into the molecular diffusion channel for transmission. Further, in this embodiment, the modulated data transmitted through the molecular diffusion channel is obtained at the receiving end, and the obtained modulated data is filtered to obtain filtered data. Specifically, in this embodiment, before demodulation, the received data is filtered by an ISI filter, so as to reduce the bit error rate of molecular diffusion communication. Next, in this embodiment, the filtered data is demodulated by using a preset demodulation algorithm to obtain demodulated data. It is easy to understand that, in this embodiment, the preset demodulation algorithm corresponds to the preset modulation algorithm. For example, when the coded data is modulated by a density shift keying modulation algorithm, the default demodulation algorithm is correspondingly a density shift keying demodulation algorithm. Further, in this embodiment, the demodulated data is decoded by a preset Solomon decoding algorithm, so as to obtain the target information sequence, that is, the second information sequence, and realize molecular diffusion communication. It is easy to understand that the preset Solomon decoding algorithm in this embodiment also corresponds to the preset Solomon encoding algorithm in the encoding process. In this embodiment, by performing preset Solomon codec operation and preset modulation operation on the data to be transmitted, the bit error problem of molecular diffusion communication can be effectively alleviated, and the reliability of molecular diffusion communication can be effectively improved.

In some embodiments of the present invention, the preset Solomon coding algorithm includes a truncated Solomon coding algorithm. Correspondingly, the first information sequence is encoded by a preset Solomon encoding algorithm to obtain encoded data, including but not limited to:

It is determined that the number of data symbols of the first information sequence is less than the preset number of symbols, and a zero symbol padding operation is performed on the first information sequence to obtain a third information sequence. Wherein, the number of symbols of the first information sequence is supplemented to a preset number of symbols through a zero symbol padding operation.

Solomon encoding is performed on the third information sequence to obtain encoded intermediate data.

Perform a truncation operation on the encoded intermediate data to obtain the encoded data. Wherein, the truncation operation truncates the zero symbols filled by the zero symbol filling operation.

即最多可以纠正t个错误符号。本实施例首先根据第一信息序列的数据符号判断第一信息序列的长度是否满足预设长度，当确定第一信息序列的数据符号个数小于预设符号数，即第一信息序列的长度小于预设长度，则对第一信息序列进行零符号填充操作，得到第三信息序列。本实施例通过零符号填充操作将第一信息序列的符号个数填充至预设符号数，即通过补零的方式将第一信息序列补充至预设长度。然后，本实施例通过所罗门(RS)编码算法对补零得到的第三信息序列进行编码得到初步的编码数据，即编码中间数据。接着，本实施例对编码中间数据进行截短操作得到编码数据。具体地，本实施例将编码中间数据中填充的零符号进行去除，即删除编码中间数据中零符号填充操作所填充的零符号，得到编码数据。本实施例将该编码数据输入分子扩散通道进行传输，仅对原始的数据符号以及相应的奇偶校验符号进行传输，以有效提高分子扩散通信过程中编解码的效率。In this specific embodiment, this embodiment uses a truncated Solomon encoding algorithm (truncated RS encoding algorithm) to encode the first information sequence to obtain encoded data. Specifically, the truncated RS(n', k') consists of inserted kk' zero symbols and a mother code RS(n, k) containing k pieces of information. The number of codewords and information symbols is changed from n, k to n', k', respectively. But it maintains error correction capability due to

That is, at most t wrong symbols can be corrected. In this embodiment, first, according to the data symbols of the first information sequence, it is judged whether the length of the first information sequence satisfies the preset length. If the length is preset, the zero symbol padding operation is performed on the first information sequence to obtain the third information sequence. In this embodiment, the number of symbols of the first information sequence is filled to a preset number of symbols through a zero symbol padding operation, that is, the first information sequence is supplemented to a preset length by zero padding. Then, in this embodiment, a Solomon (RS) encoding algorithm is used to encode the third information sequence obtained by padding zeros to obtain preliminary encoded data, that is, encoded intermediate data. Next, in this embodiment, a truncation operation is performed on the encoded intermediate data to obtain encoded data. Specifically, in this embodiment, the zero symbols filled in the encoded intermediate data are removed, that is, the zero symbols filled in the zero symbol padding operation in the encoded intermediate data are deleted to obtain encoded data. In this embodiment, the encoded data is input into the molecular diffusion channel for transmission, and only the original data symbols and corresponding parity symbols are transmitted, so as to effectively improve the efficiency of encoding and decoding in the molecular diffusion communication process.

In some embodiments of the present invention, the preset Solomon decoding algorithm includes a truncated Solomon decoding algorithm. Correspondingly, before performing the step of decoding the demodulated data through the preset Solomon decoding algorithm to obtain the second information sequence, the molecular diffusion communication method provided in this embodiment also includes but is not limited to:

Gets the number of truncated bits in the mediation data.

Build truncated decoding coefficients from the number of truncated bits.

An error localization polynomial and an error evaluation polynomial are constructed from the truncated decoding coefficients.

和错误评估多项式

分别如下式(1)和(2)所示：In this specific example. Corresponding to the preset Solomon encoding algorithm, the preset Solomon decoding algorithm in this embodiment includes a truncated Solomon decoding algorithm. Before decoding the demodulated data, this embodiment first obtains the truncated bits in the demodulated data, and constructs the truncated decoding coefficients according to the truncated bits. Then, the error localization polynomial and the error evaluation polynomial are obtained by constructing the truncated decoding coefficients. Specifically, the decoding process by using the preset Solomon decoding algorithm is mainly divided into two stages. In the first stage, the decoder checks the received codeword from the channel for errors. If the received codeword is not completely divisible by the generator polynomial, the received codeword is considered to be erroneous. This technique is called adjoint computation. If the result of the syndrome calculation is zero, the decoder terminates. In the second stage, the system corrects errors by detecting error locations and error values. In this embodiment, since the encoded data sent is a truncated RS code, only the original data symbols and the corresponding parity symbols are transmitted, therefore, it is necessary to perform corresponding steps on the error estimation module and the error location module in the Solomon decoder. Adjustment. In this embodiment, firstly, the number of truncated bits in the demodulated data is obtained, that is, the number of bits of zero symbols removed during the truncated Solomon encoding process. Next, the truncated decoding coefficients are constructed according to the number of truncated bits, and then an error localization polynomial and an error evaluation polynomial are constructed according to the truncated decoding coefficients. For example, after the corresponding truncated decoding coefficient a _i (1≤f≤n′) is obtained according to the truncated number of digits, this embodiment puts the truncated decoding coefficient a _i (1≤i≤n′) into The initial error location polynomial σ(x) and the initial error evaluation polynomial ω(x), thus constructing the corresponding error location polynomial

and the error evaluation polynomial

Respectively shown in the following formulas (1) and (2):

In some embodiments of the present invention, the demodulated data is decoded by a preset Solomon decoding algorithm to obtain a second information sequence, including but not limited to:

The demodulated data is input into the syndrome calculation module to calculate the syndrome.

Error correction is performed according to the syndrome, the error location polynomial and the error evaluation polynomial to obtain the second information sequence.

In this specific embodiment, this embodiment calculates the corresponding syndrome by inputting the mediation data into the syndrome calculation module, and then performs codeless correction according to the syndrome, error location polynomial, and error evaluation polynomial, thereby obtaining the decoded information data , that is, the second information sequence. Specifically, after transmission through the channel in this embodiment, the codeword C(x) may be damaged by noise and the received codeword, and the received codeword can be expressed as shown in the following equation (3):

y(x)=(y _n-1 , y _n-2 , . . . , y ₀ ) (3)

Among them, the received code word arrives at the decoder side. The codeword and the received codeword can be related by the equation y(x)=c(x)+e(x). Where e(x)=(e _n-1 , e _n-2 , . . . , e ₀ ), e(x) represents a noise vector, where e _i ∈ F, 0≤i≤n-1. The goal of the decoder is to recover c(x) from y(x). It is easy to understand that when the Hamming weight (the number of non-zero items) of e(x) satisfies the following formula (4):

的位置索引。接着，本实施例把误差矢量又重新定义为一组误差位置：

以及一组误差值：Y_i＝e_i，1≤J≤τ。本实施例中错误定位多项式以及错误评估多项式分别如上式(1)和(2)所示。本实施例中通过预设所罗门解码算法对解调数据进行解码主要包括校验子计算以及查找错误定位器和错误评估多项式两个阶段。首先，本实施例首先将解调数据输入校验子计算模块计算得到校验子。多项式

与接收到的与码字根部评估的码字y相关的多项式

在代码的根处计算，产生幂和，即校验子，如下式(5)所示：Further, expressed by 0≤i ₁ <i ₂ <...<i _τ ≤n-1

The location index of . Next, in this embodiment, the error vector is redefined as a group of error positions:

And a set of error values: Y _i =e _i , 1≤J≤τ. In this embodiment, the error location polynomial and the error evaluation polynomial are shown in the above equations (1) and (2) respectively. In this embodiment, the decoding of the demodulated data by using the preset Solomon decoding algorithm mainly includes two stages of syndrome calculation, error locator and error evaluation polynomial search. First, in this embodiment, the demodulated data is first input into the syndrome calculation module to calculate the syndrome. polynomial

The polynomial associated with the received codeword y evaluated with the root of the codeword

Calculated at the root of the code to generate a power sum, that is, a syndrome, as shown in the following formula (5):

Then, in the present embodiment, the error locator and the error evaluator polynomial satisfy the key equation as shown in the following formula (6):

Further, this embodiment solves the key equation through the extended Euclidean algorithm. Then, in this embodiment, the error position is searched and the error value is calculated according to the result of solving the key equation, so as to perform bit error correction according to the error position and error value, and obtain the second information sequence.

In some embodiments of the invention, the modulation algorithm comprises a binary density shift keying modulation algorithm. Correspondingly, the coded data is modulated by a preset modulation algorithm to obtain modulated data, including but not limited to:

The coded data is modulated by a binary concentration shift keying modulation algorithm to obtain modulated data.

In this specific embodiment, the coded data is modulated by a binary concentration shift keying modulation algorithm to obtain modulated data. Specifically, in the molecular diffusion communication system, the sending end and the receiving end use the concentration of the messenger molecule as the signal carrier, which is called concentration shift keying (Concentration Shift Keying, CSK), which is similar to the amplitude modulation of traditional communication. In this embodiment, two different concentrations of the same type of molecules are used to represent "0" and "1", and this modulation method is called binary concentration shift keying modulation (BCSK). In BCSK, information can be modulated on a single pulse or a square wave. BCSK (pulse) modulation is to emit molecules at each starting point of the sending end (that is, pulse transmission), while BCSK (square wave) modulation is in a cycle send molecules. Exemplarily, in this embodiment, the signal "1" is represented by sending N _TX =2000 molecules. In order to reduce energy loss, "0" is represented by not sending numerators. In the present embodiment, the following expression (7) is used to represent in BCSK (pulse) modulation, the number of numerators that symbols are sent at each sampling time point:

表示在一个符号持续周期t_s的每个采样点上需发射的平均分子数。本实施例通过下列表达式(8)来表示BCSK(方波)调制中，符号在每个采样时刻点上发送的分子数：Among them, N _TX in the formula represents the number of molecules sent in one cycle, round() represents the nearest integer, t _ss represents the sampling interval, t _s represents the symbol duration period,

Indicates the average number of molecules to be emitted at each sampling point of a symbol duration t _s . In the present embodiment, the number of numerators that symbols are sent at each sampling time point in BCSK (square wave) modulation is represented by the following expression (8):

Among them, in the formula, μ _α represents the average amplitude of symbol i, and m represents the maximum symbol number of symbol i.

The binary concentration offset keying modulation algorithm in this embodiment is similar to amplitude modulation, and it is relatively easy to realize modulation and demodulation. In this embodiment, an ISI filter is added before demodulation to perform ISI filtering on the received data, so as to alleviate the problem that the binary concentration shift keying modulation algorithm is greatly affected by intersymbol interference.

In some embodiments of the invention, the preset demodulation algorithm includes a binary density shift keying demodulation algorithm. Correspondingly, the filtered data is demodulated by a preset demodulation algorithm to obtain demodulated data, including but not limited to:

The filtered data is demodulated by a binary concentration shift keying demodulation algorithm to obtain demodulated data.

In this specific embodiment, this embodiment demodulates the filtered data through a binary concentration shift keying demodulation algorithm. Specifically, the preset demodulation algorithm in this embodiment is a binary density shift keying demodulation algorithm, corresponding to a binary density shift keying modulation algorithm. In this embodiment, firstly, a molecular quantity threshold is set at the receiving end. Then, analyze the filtered data obtained by filtering. When it is determined according to the filtering data that the received molecule exceeds the threshold value of the number of molecules, the received signal is demodulated as "1", otherwise it is set as "0". In this embodiment, the filtered data is demodulated according to the set molecular number threshold to obtain demodulated data.

In some embodiments of the present invention, the error correction is performed according to the syndrome, the error location polynomial, and the error evaluation polynomial to obtain the second information sequence, including but not limited to:

According to the syndrome and the error location polynomial, the error location data is obtained through Chien's search algorithm calculation.

The error value is calculated according to the syndrome and the error evaluation polynomial to obtain the error value data.

The code word is corrected according to the error position data and the error value data to obtain the second information sequence.

当

时x对应着误差位置X_j，一旦误差位置X_j被找到，相应的误差值可以表示如下式(9)所示：In this specific embodiment, this embodiment calculates the error position data through the chien search algorithm according to the syndrome and the error location polynomial, and calculates the error value data according to the syndrome and the error evaluation polynomial, so that according to the error position data and the error Codeword correction is performed on the value data to obtain the second information sequence. Specifically, this embodiment uses the chien search algorithm to describe the error position. Exemplarily, it is calculated when x=α ^-1 , n-1≥i≥0

when

When x corresponds to the error position X _j , once the error position X _j is found, the corresponding error value can be expressed as the following formula (9):

表示多项式

对x的形式导数。本实施例中误差位置X_j通过从相应的项

中减去y的值来修正Y_j的值。Among them, in the formula

represent a polynomial

Formal derivative with respect to x. In this embodiment the error position X _j is obtained from the corresponding term

Subtract the value of y to correct the value of Y _j .

An embodiment of the present invention also provides a molecular diffusion communication system, comprising:

The data obtaining module is used to obtain the first information sequence to be sent.

The encoding module is configured to encode the first information sequence by using a preset Solomon encoding algorithm to obtain encoded data.

The modulation module is used to modulate the coded data through a preset modulation algorithm to obtain modulated data.

The transmission module is used for inputting modulation data into the molecular diffusion channel for transmission.

The filter module is used to obtain the modulation data transmitted by the molecular diffusion channel, input the modulation data into the intersymbol crosstalk filter for filtering, and obtain the filtered data.

The demodulation module is used to demodulate the filtered data through a preset demodulation algorithm to obtain demodulated data. Wherein, the preset demodulation algorithm corresponds to the preset modulation algorithm.

The decoding module is configured to decode the demodulated data through a preset Solomon decoding algorithm to obtain the second information sequence. Wherein, the preset Solomon decoding algorithm corresponds to the preset Solomon encoding algorithm.

Referring to Figure 2, an embodiment of the present invention also provides a molecular diffusion communication system, including:

at least one processor 210 .

At least one memory 220 is used to store at least one program.

When at least one program is executed by at least one processor 210, the at least one processor 210 implements the molecular diffusion communication method as described in the above-mentioned embodiments.

An embodiment of the present invention also provides a computer-readable storage medium, the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by one or more control processors, for example, to execute the above implementation The steps described in the example.

Those skilled in the art can understand that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware and an appropriate combination thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit . Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As known to those of ordinary skill in the art, the term computer storage media includes both volatile and nonvolatile media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules, or other data. permanent, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, tape, magnetic disk storage or other magnetic storage devices, or can Any other medium used to store desired information and which can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation, and those skilled in the art can also make various equivalent deformations or replacements without violating the spirit of the present invention. Equivalent modifications or replacements are all within the scope defined by the claims of the present invention.

Claims (10)

1. A molecular diffusion communication method, comprising the steps of:

acquiring a first information sequence to be transmitted;

encoding the first information sequence through a preset Solomon encoding algorithm to obtain encoded data;

modulating the coded data through a preset modulation algorithm to obtain modulated data;

inputting the modulated data into a molecular diffusion channel for transmission;

acquiring modulation data transmitted by the molecular diffusion channel, and inputting the modulation data into an inter-code crosstalk filter for filtering to obtain filtering data;

demodulating the filtered data through a preset demodulation algorithm to obtain demodulated data; wherein the preset demodulation algorithm corresponds to the preset modulation algorithm;

decoding the demodulation data through a preset Solomon decoding algorithm to obtain a second information sequence; wherein the preset Solomon decoding algorithm corresponds to the preset Solomon encoding algorithm.

2. The molecular diffusion communication method of claim 1, wherein the predetermined Solomon encoding algorithm comprises a truncated Solomon encoding algorithm;

the coding the first information sequence through a preset Solomon coding algorithm to obtain coded data, which comprises the following steps:

determining that the number of data symbols of the first information sequence is smaller than the preset number of symbols, and performing zero symbol filling operation on the first information sequence to obtain a third information sequence; the number of symbols of the first information sequence is supplemented to the preset number of symbols through the zero symbol filling operation;

performing Solomon coding on the third information sequence to obtain coded intermediate data;

performing truncation operation on the encoded intermediate data to obtain encoded data; wherein the puncturing operation punctures zero symbols filled by the zero symbol filling operation.

3. The molecular diffusion communication method of claim 2, wherein the predetermined Solomon decoding algorithm comprises a truncated Solomon decoding algorithm;

before performing the step of decoding the demodulated data by a preset Solomon decoding algorithm to obtain a second information sequence, the method further comprises:

obtaining a truncated number of bits in the mediation data;

constructing truncated decoding coefficients according to the truncated digits;

and constructing an error positioning polynomial and an error evaluation polynomial according to the truncated decoding coefficient.

4. A molecular diffusion communication method according to claim 3, wherein decoding the demodulated data by a preset solomon decoding algorithm to obtain a second information sequence comprises:

inputting the demodulation data into a syndrome calculation module to calculate to obtain a syndrome;

and correcting error codes according to the syndrome, the error positioning polynomial and the error evaluation polynomial to obtain the second information sequence.

5. The molecular diffusion communication method according to claim 1, wherein the preset modulation algorithm comprises a binary concentration shift keying modulation algorithm;

the modulating the coded data by a preset modulation algorithm to obtain modulated data comprises:

and modulating the coded data by the binary concentration shift keying modulation algorithm to obtain the modulated data.

6. The molecular diffusion communication method of claim 5, wherein the preset demodulation algorithm comprises a binary concentration shift keying demodulation algorithm;

demodulating the filtered data through a preset demodulation algorithm to obtain demodulated data, wherein the demodulating comprises the following steps:

and demodulating the filtered data through the binary concentration shift keying demodulation algorithm to obtain the demodulated data.

7. The method of molecular diffusion communication according to claim 4, wherein said performing error correction based on said syndrome, said error localization polynomial, and said error assessment polynomial to obtain said second information sequence comprises:

calculating through a Qian's search algorithm according to the syndrome and the error positioning polynomial to obtain error position data;

performing error value calculation according to the syndrome and the error evaluation polynomial to obtain error value data;

and carrying out codeword correction according to the error position data and the error value data to obtain the second information sequence.

8. A molecular diffusion communication system comprising:

the data acquisition module is used for acquiring a first information sequence to be transmitted;

the coding module is used for coding the first information sequence through a preset Solomon coding algorithm to obtain coded data;

the modulation module is used for modulating the coded data through a preset modulation algorithm to obtain modulation data;

the transmission module is used for inputting the modulation data into a molecular diffusion channel for transmission;

the filtering module is used for acquiring the modulation data transmitted by the molecular diffusion channel, and inputting the modulation data into an inter-code crosstalk filter for filtering to obtain filtering data;

the demodulation module is used for demodulating the filtered data through a preset demodulation algorithm to obtain demodulated data; wherein the preset demodulation algorithm corresponds to the preset modulation algorithm;

the decoding module is used for decoding the demodulation data through a preset Solomon decoding algorithm to obtain a second information sequence; wherein the preset Solomon decoding algorithm corresponds to the preset Solomon encoding algorithm.

9. A molecular diffusion communication system comprising:

at least one processor;

at least one memory for storing at least one program;

when the at least one program is executed by the at least one processor, the at least one processor is caused to implement the molecular diffusion communication method of any one of claims 1 to 7.

10. A computer storage medium in which a processor-executable program is stored, characterized in that the processor-executable program is for implementing the molecular diffusion communication method according to any one of claims 1 to 7 when being executed by the processor.

Images