CN116073929B - Data detection method in MIMO satellite communication system - Google Patents
Data detection method in MIMO satellite communication system Download PDFInfo
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- CN116073929B CN116073929B CN202310261013.3A CN202310261013A CN116073929B CN 116073929 B CN116073929 B CN 116073929B CN 202310261013 A CN202310261013 A CN 202310261013A CN 116073929 B CN116073929 B CN 116073929B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a data detection method in a MIMO satellite communication system, relates to the technical field of satellite communication, and solves the technical problems that the advantages of a space diversity technology and a space administration technology are difficult to fully utilize in the prior art, and the data transmission efficiency is influenced; the method comprises the steps of determining a data dividing period according to the data quantity of original data, and dividing the original data into a plurality of target data through the data dividing period; according to the invention, the target data is dynamically balanced by data processing before the data is transmitted from the transmitting end to the receiving end, so that a good data foundation is laid for orderly and reliable transmission of the target data; the method sequentially identifies the importance of each original data in the target data, and extracts the number of transmitting antennas and the number of receiving antennas corresponding to each original data by combining an antenna communication sequence; generating a data transmission sequence by combining the identification tags of all original data in the target data; the invention dynamically fills the data transmission sequence and completes data transmission, thereby realizing high-efficiency and reliable transmission of the original data.
Description
Technical Field
The invention belongs to the field of satellite communication, relates to a data analysis and detection technology in a MIMO satellite communication system, and particularly relates to a data detection method in the MIMO satellite communication system.
Background
With the development of wireless communication technology, satellite communication has made great progress, and it basically realizes internet access covering the world. However, with the increasing demand for data transmission rate, satellite communication has not been able to meet the transmission demand of people as an important means for wide area information transmission. Therefore, the introduction of Multiple Input Multiple Output (MIMO) technology is becoming a popular solution.
In the MIMO satellite communication system, the data transmission efficiency can be improved through the number of M transmitting end antennas and the number of N receiving end antennas; the reliability of data transmission can be ensured by utilizing a space diversity technology, and the method is suitable for scenes with long transmission distance and low speed requirement; the data transmission efficiency can be improved by utilizing the spatial multiplexing technology, and the method is suitable for scenes with short transmission distance and high speed requirement. However, when large-scale data transmission is performed, the transmitted data cannot be adaptively identified, so that the advantages of the space diversity technology and the space administration technology are difficult to fully utilize, and the data transmission efficiency of the MIMO satellite communication system is affected; therefore, a data detection method in a MIMO satellite communication system is needed.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art; therefore, the invention provides a data detection method in a MIMO satellite communication system, which is used for solving the technical problems that the prior art cannot carry out self-adaptive identification on transmitted data when carrying out mass data transmission, and the advantages of a space diversity technology and a space taking technology are difficult to fully utilize, so that the data transmission efficiency is influenced.
To achieve the above object, a first aspect of the present invention provides a data detection method in a MIMO satellite communication system, including:
acquiring a transmitting end and a receiving end connected with the transmitting end, and identifying the number of transmitting antennas of the transmitting end and the number of receiving antennas of the receiving end; constructing an antenna communication sequence based on the number of transmitting antennas and the number of receiving antennas;
determining a data dividing period according to the data quantity of the original data, and dividing the original data into a plurality of target data through the data dividing period; sequentially identifying the importance of each original data in the target data, and acquiring an identification tag;
extracting the number of transmitting antennas and the number of receiving antennas corresponding to each original data based on the antenna communication sequence; and then, generating a data transmission sequence by combining the identification tags of the original data in the target data, and completing data transmission.
Preferably, the constructing an antenna communication sequence based on the number of transmitting antennas and the number of receiving antennas includes:
receiving terminal information of a plurality of receiving terminals in communication connection with the transmitting terminal through the transmitting terminal; the receiving terminal is wireless receiving equipment covered by the transmitting terminal;
identifying the number of receiving antennas of a receiving end and a terminal identifier based on terminal information, and generating an antenna communication sequence by combining the number of transmitting antennas of a transmitting end; the terminal identifier is a unique identifier of the receiving end.
Preferably, the determining the data dividing period according to the data amount of the original data includes:
extracting the total data amount of the original data to be transmitted currently by the transmitting terminal, and marking the total data amount as SZL;
determining a data dividing period SHZ by the formula shz=α/SHZ; where α is a scaling factor greater than 0, determined based on historical transmission experience.
Preferably, the dividing the original data into a plurality of target data by the data dividing period includes:
acquiring the receiving moment of the original data to be sent currently by a sending end;
dividing original data to be transmitted into a plurality of target data based on a data dividing period and a receiving moment; wherein the target data comprises a plurality of continuous complete or incomplete original data.
Preferably, the step of sequentially identifying the importance of each original data in the target data to obtain the identification tag includes:
marking the original data in the target data as i in sequence; wherein i is a positive integer;
identifying whether the original data is encrypted with emphasis; if yes, marking the identification tag as 1; if not, judging whether the corresponding receiving end is a key terminal; if yes, marking the identification tag as 1; if not, the identification tag is set to 0.
Preferably, the generating the data transmission sequence by combining the identification tag of each original data in the target data includes:
sequentially extracting original data and the number of transmitting antennas corresponding to the transmitting end from target data; determining the number of data transmission sequences according to the number of the transmission antennas; wherein the number of transmitting antennas is associated with a data transmission sequence;
combining a space transmission technology with the number of data transmission sequences, and coding or dividing original data to generate a data transmission sequence; among other spatial transmission techniques, spatial diversity or spatial multiplexing.
Preferably, the spatial transmission technique is determined according to an identification tag of the original data, and includes:
judging whether the original data is important or not according to the identification tag of the original data; if yes, adopting a space diversity technology, or adopting a space diversity technology and a space multiplexing technology; if not, adopting a space taking technology.
Preferably, after the original data is encoded or divided, the encoded or divided data is dynamically filled according to the existing data amount in each data transmission sequence, so as to realize the equalization of each data transmission sequence.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention constructs an antenna communication sequence based on the number of transmitting antennas and the number of receiving antennas; determining a data dividing period according to the data quantity of the original data, and dividing the original data into a plurality of target data through the data dividing period; according to the invention, the target data is dynamically balanced by data processing before the data is transmitted from the transmitting end to the receiving end, and a good data foundation is laid for orderly and reliable transmission of the target data.
2. The method sequentially identifies the importance of each original data in the target data and acquires the identification tag; extracting the number of transmitting antennas and the number of receiving antennas corresponding to each original data based on the antenna communication sequence; then, generating a data transmission sequence by combining the identification tags of the original data in the target data; the invention dynamically fills the data transmission sequence and completes data transmission, thereby realizing high-efficiency and reliable transmission of the original data.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the method steps of the present invention.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, an embodiment of a first aspect of the present invention provides a data detection method in a MIMO satellite communication system, including: acquiring a transmitting end and a receiving end connected with the transmitting end, and identifying the number of transmitting antennas of the transmitting end and the number of receiving antennas of the receiving end; constructing an antenna communication sequence based on the number of transmitting antennas and the number of receiving antennas; determining a data dividing period according to the data quantity of the original data, and dividing the original data into a plurality of target data through the data dividing period; sequentially identifying the importance of each original data in the target data, and acquiring an identification tag; extracting the number of transmitting antennas and the number of receiving antennas corresponding to each original data based on the antenna communication sequence; and then, generating a data transmission sequence by combining the identification tags of the original data in the target data, and completing data transmission.
In a satellite system based on the MIMO communication technology, a plurality of data transmission channels can be established between the number of transmitting antennas and the number of receiving antennas, and data can be transmitted more efficiently and reliably than the traditional satellite communication system. In the process of transmitting a large amount of data, the data needs to be identified and selected, and different data transmission technologies are selected according to the data properties so as to ensure that the data transmission meets the corresponding high-efficiency and reliability requirements.
In a preferred embodiment, constructing an antenna communication sequence based on the number of transmit antennas and the number of receive antennas comprises: receiving terminal information of a plurality of receiving terminals in communication connection with the transmitting terminal through the transmitting terminal; and identifying the number of receiving antennas of the receiving end and the terminal identification based on the terminal information, and generating an antenna communication sequence by combining the number of transmitting antennas of the transmitting end.
Before data transmission, it is necessary to determine a possible data transmission channel between the transmitting end and the receiving end. The transmitting end in the embodiment is a MIMO satellite communication system, specifically refers to a unit responsible for data transmission and antenna array control in the MIMO satellite communication system; the receiving end is wireless receiving equipment covered by the transmitting end, such as a mobile phone, a computer and the like. In this embodiment, the number of transmitting antennas in the transmitting antenna array is fixed, and a plurality of receiving ends are communicatively connected to the transmitting end, and each receiving end is provided with at least one receiving antenna.
The present embodiment determines the number of transmitting antennas and the number of antennas of the receiving end communicatively connected thereto from the perspective of the transmitting end. A data transmission channel can be established between any group of transmitting antennas and any group of receiving antennas. Therefore, a plurality of data transmission channels can be established between the transmitting end and the receiving end. The terminal identifier is a unique identifier of the receiving end, and can be a digital number or a hash value uniquely associated with the receiving end.
Illustrating the construction of an antenna communication sequence: the existing receiving end corresponds to M transmitting antennas, N receiving ends correspond to N receiving antennas (each receiving end corresponds to one receiving antenna), and the unique identifier of the receiving end is Q. One of the data transmission channels may be represented as M, (Q, N), and all the data transmission channels are represented in a matrix form, thereby obtaining an antenna communication sequence. The M, N, Q is a positive integer.
After determining the antenna communication sequence between the transmitting end and the receiving end, it is required to determine how to sort the original data to be transmitted. Determining a data dividing period according to a data amount of the original data, including: extracting the total data amount of the original data to be transmitted currently by the transmitting terminal, and marking the total data amount as SZL; the data division period SHZ is determined by the formula shz=α/SHZ.
The sending end may accumulate a large amount of original data to be sent in a short time, and it is very critical how to reasonably and effectively sort the original data to be sent. When the original data is accumulated in a large quantity in a short time, the load of the transmitting end is comprehensively considered to determine the data quantity transmitted once so as to ensure that the transmitting end cannot be overloaded; similarly, when the original data of the transmitting end are relatively scattered, the data processing cost should be comprehensively considered so as to reduce the data processing frequency.
Illustrating the determination of the data partitioning period: the transmitting end accumulates 100M of original data in 0.01 seconds on average, and in order to avoid overload of the transmitting end, the data dividing period is determined through alpha/100; similarly, the transmitting end accumulates 1M of original data in 0.01 seconds on average, and the data dividing period is also determined by α/1. In this embodiment, α is a scaling factor greater than 0, and is determined according to historical transmission experience, so that the reasonable setting of α can reasonably balance the load of the transmitting end, and ensure the working efficiency of the transmitting end.
The original data is then required to be divided into several target data by a data division period, including: acquiring the receiving moment of the original data to be sent currently by a sending end; the original data to be transmitted is divided into a plurality of target data based on the data dividing period and the receiving time.
In this embodiment, the original data is divided into target data, and the target data is mainly sent in batches, and after the batches, further processing and distribution are required to be performed on each original data to improve the data transmission efficiency and the security. Meanwhile, in the process of further analyzing the previous target data, the next target data is continuously formed, and the overall influence on the data transmission efficiency is small.
The target data includes a plurality of pieces of original data, and in consideration of the possibility of dividing the original data in the subsequent data processing, it is possible to analyze the total data amount of the target data, that is, to unify the data amounts of the original data included in the respective target data as much as possible after the target data is acquired according to the data dividing period. Thus, the target data may include both the complete original data and a portion of the original data. It should be noted that if the data size of the original data is very large, there is also a possibility that one piece of the original data is divided into a plurality of pieces of target data, and flexible generation of the target data is required.
In this embodiment, an antenna communication sequence is established based on basic information of a transmitting end and a receiving end, and then original data accumulated by the transmitting end is divided according to a data dividing period obtained by calculation, so as to generate target data. The embodiment completes the data processing before the data is sent from the sending end to the receiving end, dynamically balances the target data, and lays a good data foundation for orderly and reliable sending of the target data.
In a preferred embodiment, sequentially identifying the importance of each original data in the target data, and acquiring the identification tag includes: marking the original data in the target data as i in sequence; identifying whether the original data is encrypted with emphasis; if yes, marking the identification tag as 1; if not, judging whether the corresponding receiving end is a key terminal; if yes, marking the identification tag as 1; if not, the identification tag is set to 0.
In the MIMO satellite communication system, transmission reliability needs to be ensured for important data, and high efficiency of data transmission needs to be ensured for other data. In this embodiment, whether the original data is important or not is first identified, that is, whether the original data is subjected to key encryption or whether the corresponding receiving end is a key terminal, and whether the corresponding identification tag is set to 1 can be determined as important data if any condition is satisfied. The key encryption in this embodiment is other than normal data transmission encryption, such as encrypting the original data before sending it by the client; the key terminal refers to whether the receiving end has data storage and data confidentiality tasks, and if the original data needs to be stored through a certain storage device, the reliability in the data transmission process needs to be ensured.
It should be noted that, in this embodiment, the importance of the original data is determined by whether the key encryption is performed or whether the corresponding receiving end is a key terminal; in other preferred embodiments, the importance of the original data may also be determined according to the index and the flow.
Next, each original data in the target data needs to be analyzed according to the identification tag, and a data transmission sequence is obtained, including: sequentially extracting original data and the number of transmitting antennas corresponding to the transmitting end from target data; determining the number of data transmission sequences according to the number of the transmission antennas; combining the space transmission technology with the number of the data transmission sequences, and coding or dividing the original data to generate the data transmission sequences.
In order to fully utilize the advantages of the MIMO technology, the present embodiment determines the number of data transmission sequences according to the number of transmission antennas at the transmitting end, which can be understood that one transmission antenna is responsible for data transmission of a group of data transmission sequences associated with the transmission antenna, that is, the number of transmission antennas is associated with the data transmission sequences.
The spatial transmission technique of the present embodiment includes spatial diversity or spatial multiplexing. The idea of the space diversity technique is to make different versions of the same original data, respectively encode and modulate the same data in different antennas, and then transmit the same data. The original data can be original data to be transmitted, or new original data formed by carrying out certain mathematical transformation on the original data. The receiving end separates the received signals by using a space equalizer, demodulates and decodes the received signals, combines different received signals of the same original data, and restores the original signals. The spatial diversity technique can more reliably transmit data. The space division multiplexing technology refers to dividing original data to be transmitted into a plurality of data streams, respectively encoding and modulating the data streams through different antennas, and then transmitting the data streams, thereby improving the transmission rate of the system. The antennas are mutually independent, one antenna is equivalent to an independent channel, and a receiving end separates a received signal by using a space equalizer, demodulates and decodes the received signal, combines a plurality of data streams and restores an original signal.
In the process of generating the data transmission sequence, the identification tags of the original data in the target data are sequentially identified. When the identification tag of the original data is 1, the original data is sent through at least two sending antenna codes; when the identification tag of the original data is 0, the original data is divided into at least two data streams for transmission.
The space transmission technology is determined according to the identification tag of the original data, and comprises the following steps: judging whether the original data is important or not according to the identification tag of the original data; if yes, adopting a space diversity technology, or adopting a space diversity technology and a space multiplexing technology; if not, adopting a space taking technology.
For example, the number of data transmission sequences of existing raw data a and B is 2; a is important data, B is non-important data, the data A is marked as A1 and A2 after being backed up, the data B is marked as B1 and B2 at two ends, and the generated two data transmission sequences are [ A1, B1] and [ A2, B2] respectively.
After the original data is encoded or divided, the encoded or divided data is dynamically padded according to the existing data amount in each data transmission sequence, so that the equalization of each data transmission sequence is realized. Continuing the above example, the number of data transmission sequences for existing raw data a and B is 4; a is important data, B is non-important data, the data A is marked as A1 and A2 after being backed up, the data B is marked as B1 and B2 at two ends (the data quantity of B1 and B2 is equal) respectively, and the generated two data transmission sequences are [ A1], [ B1], [ A2] and [ B2] respectively. Thus, the data quantity corresponding to the four data transmission sequences is equal, and the transmitting end can rapidly transmit the data and can also ensure the reliability of A data transmission.
According to the method and the device, all original data in target data are segmented or encoded based on the number of identification tags and data transmission sequences, and then the data transmission sequences are dynamically filled, so that efficient and reliable data transmission is achieved.
The partial data in the formula are all obtained by removing dimension and taking the numerical value for calculation, and the formula is a formula closest to the real situation obtained by simulating a large amount of collected data through software; the preset parameters and the preset threshold values in the formula are set by those skilled in the art according to actual conditions or are obtained through mass data simulation.
The above embodiments are only for illustrating the technical method of the present invention and not for limiting the same, and it should be understood by those skilled in the art that the technical method of the present invention may be modified or substituted without departing from the spirit and scope of the technical method of the present invention.
Claims (8)
1. A method for detecting data in a MIMO satellite communication system, comprising:
acquiring a transmitting end and a receiving end connected with the transmitting end, and identifying the number of transmitting antennas of the transmitting end and the number of receiving antennas of the receiving end; constructing an antenna communication sequence based on the number of transmitting antennas and the number of receiving antennas;
determining a data dividing period according to the data quantity of the original data, and dividing the original data into a plurality of target data through the data dividing period; sequentially identifying the importance of each original data in the target data, and acquiring an identification tag;
extracting the number of transmitting antennas and the number of receiving antennas corresponding to each original data based on the antenna communication sequence; and then, generating a data transmission sequence by combining the identification tags of the original data in the target data, and completing data transmission.
2. The method for detecting data in a MIMO satellite communication system according to claim 1, wherein said constructing an antenna communication sequence based on the number of transmitting antennas and the number of receiving antennas comprises:
receiving terminal information of a plurality of receiving terminals in communication connection with the transmitting terminal through the transmitting terminal; the receiving terminal is wireless receiving equipment covered by the transmitting terminal;
identifying the number of receiving antennas of a receiving end and a terminal identifier based on terminal information, and generating an antenna communication sequence by combining the number of transmitting antennas of a transmitting end; the terminal identifier is a unique identifier of the receiving end.
3. The method for detecting data in a MIMO satellite communication system according to any one of claims 1 to 2, wherein the determining the data dividing period based on the data amount of the original data comprises:
extracting the total data amount of the original data to be transmitted currently by the transmitting terminal, and marking the total data amount as SZL;
determining a data dividing period SHZ by the formula shz=α/SHZ; where α is a scaling factor greater than 0, determined based on historical transmission experience.
4. A method for detecting data in a MIMO satellite communication system according to claim 3, wherein said dividing the original data into a plurality of target data by a data dividing period comprises:
acquiring the receiving moment of the original data to be sent currently by a sending end;
dividing original data to be transmitted into a plurality of target data based on a data dividing period and a receiving moment; wherein the target data comprises a plurality of continuous complete or incomplete original data.
5. The method for detecting data in a MIMO satellite communication system according to claim 1, wherein said sequentially identifying the importance of each original data in the target data, obtaining the identification tag, comprises:
marking the original data in the target data as i in sequence; wherein i is a positive integer;
identifying whether the original data is encrypted with emphasis; if yes, marking the identification tag as 1; if not, judging whether the corresponding receiving end is a key terminal; if yes, marking the identification tag as 1; if not, the identification tag is set to 0.
6. The method for detecting data in a MIMO satellite communication system according to claim 1, wherein the generating a data transmission sequence in combination with the identification tag of each original data in the target data comprises:
sequentially extracting original data and the number of transmitting antennas corresponding to the transmitting end from target data; determining the number of data transmission sequences according to the number of the transmission antennas; wherein the number of transmitting antennas is associated with a data transmission sequence;
combining a space transmission technology with the number of data transmission sequences, and coding or dividing original data to generate a data transmission sequence; among other spatial transmission techniques, spatial diversity or spatial multiplexing.
7. The method for detecting data in a MIMO satellite communication system according to claim 6, wherein the spatial transmission technique is determined based on an identification tag of the original data, comprising:
judging whether the original data is important or not according to the identification tag of the original data; if yes, adopting a space diversity technology, or adopting a space diversity technology and a space multiplexing technology; if not, adopting a space taking technology.
8. The method for detecting data in a MIMO satellite communication system according to claim 7, wherein after the original data is encoded or divided, the encoded or divided data is dynamically padded according to the existing data amount in each data transmission sequence, so as to achieve equalization of each data transmission sequence.
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