Abstract: Provided are a method and apparatus for determining a positioning parameter, a computer device and a storage medium. The method includes: determining Time of Flight (ToF) spectrum data of a positioning signal according to the positioning signal sent via multi-channels by a terminal to be positioned; correcting an ideal spatial manifold matrix according to a preset antenna array deviation function, so as to obtain a corrected spatial manifold matrix; and determining a positioning parameter of Line Of Sight (LOS) of the positioning signal according to the ToF spectrum data and the corrected spatial manifold matrix, wherein the LOS is the shortest path from the terminal to be positioned to the antenna array.

Abstract: The disclosure discloses a method and system for constructing and analyzing a knowledge graph of a wireless communication network protocol, and a device and a medium. The method for constructing and analyzing the knowledge graph of the wireless communication network protocol includes: defining entities and a relation between the entities according to endogenous factors of a wireless communication network protocol, defining a triplet based on the defined entities and the defined relation between the entities, and constructing a knowledge graph of the endogenous factors of the wireless communication network protocol based on the defined triplet; and performing association analysis between any nodes in the knowledge graph to acquire an association relation hidden between the endogenous factors of the wireless communication network protocol.

Abstract: Provided are a method and apparatus (700) for determining an angle and a distance of a target (104, 200), a radar (102, 800), and a storage medium. The method includes: a frequency diversity signal is transmitted to a target (104, 200), and a received signal reflected by the target (104, 200) is received; an equivalent received signal vector is determined; hole filling processing is performed based on the equivalent received signal vector, so as to determine a uniform received signal vector; an equivalent received signal equation is performed based on the uniform received signal vector, and an objective function and a constraint condition is established for solving an objective optimization problem of the equivalent received signal equation (S240); and the objective optimization problem is solved to obtain an objective solution matrix, and the angle and the distance of the target is determined based on the objective solution matrix (S250).

Abstract: Provided is an improved beam control method of an array antenna based on frequency diversity. The method includes: signals from a transmitter are received by a receiving array which includes a first sub-array and a second sub-array, wherein the first sub-array includes M uniformly arranged array elements, the second sub-array includes N uniformly arranged array elements, M and N are coprime integers, and N?0; a signal received by each array element in the receiving array is input into a constructed model, and a covariance matrix is output after processing the signal via the model; a virtual array is constructed at a receiver, wherein a virtual array element in the virtual array is a second-order statistic calculated according to the covariance matrix; and a frequency is randomly selected for each virtual array element from a frequency set of the virtual array, so as to form a beam pattern.

Abstract: In a method for coding on a time-space two-dimensional channels, the system expresses the coding method with code words, merges the code words to form a space-time two-dimensional codebook, stores the codebook at both ends of the sending terminal and the receiving terminal; the sending terminal selects the coding structure according to the code words, and encodes each data stream according to time-domain coding rates, and forms data blocks of an equal length in the time-domain through the rate matching. The system selects different code word serial numbers, rate matching tables and space time slicing modes according to the requirements of different scenarios for transmission rates, latency and code error rate, as well as channel states and size of data blocks; when a Time Space Concatenated Coding Mode is adopted, the sending terminal performs time-domain coding according to the time-domain slicing mode and the time-domain code words.

Abstract: Provided are a system and method for intelligently analyzing and applying a wireless communication network knowledge graph. The system includes at least a knowledge graph unit, an intelligent traceability unit, and a tuning strategy unit. The knowledge graph unit is configured to construct the wireless communication network knowledge graph, and achieve deep analysis and cyclic tuning of the graph in combination with wireless communication network data; the intelligent traceability unit is configured to detect a network anomaly and trace a cause and a source; and the tuning strategy unit is configured to generate a plurality of tuning strategies, determine an optimal tuning strategy, and perform tuning on a wireless communication network. According to the system provided in the present disclosure, intelligent closed-loop feedback is formed, and cyclic tuning is performed on a wireless communication network, thereby effectively improving the performance of the wireless communication network and QoE of users.

Abstract: Provided are a method and apparatus for determining a positioning parameter, a computer device and a storage medium. The method includes: determining Time of Flight (ToF) spectrum data of a positioning signal according to the positioning signal sent via multi-channels by a terminal to be positioned; correcting an ideal spatial manifold matrix according to a preset antenna array deviation function, so as to obtain a corrected spatial manifold matrix; and determining a positioning parameter of Line Of Sight (LOS) of the positioning signal according to the ToF spectrum data and the corrected spatial manifold matrix, wherein the LOS is the shortest path from the terminal to be positioned to the antenna array.

Abstract: Provided are a method and apparatus (700) for determining an angle and a distance of a target (104, 200), a radar (102, 800), and a storage medium. The method includes: a frequency diversity signal is transmitted to a target (104, 200), and a received signal reflected by the target (104, 200) is received; hole filling processing is performed based on the equivalent received signal vector, so as to determine a uniform received signal vector; an equivalent received signal equation is performed based on the uniform received signal vector, and an objective function and a constraint condition is established for solving an objective optimization problem of the equivalent received signal equation (S240); and the objective optimization problem is solved to obtain an objective solution matrix, and the angle and the distance of the target is determined based on the objective solution matrix (S250).

Abstract: Disclosed is a method for constructing a data warehouse based on a wireless communication network, which includes: preprocessing original data to generate an original data table, and a KPI data table; performing knowledge extraction on the original data table and the KPI data table, and obtaining an initial data classification model by means of endogenous association inference; splitting the original data table and the KPI data table according to the initial data classification model, so as to construct initially classified basic summary data tables; performing association inference on the initial data classification model so as to output associated fields, calculating weights of associations between the associated fields and sorting the weights, and outputting a preferential association model; and performing, according to the preferential association model, data extraction, transformation and loading from the basic summary data tables, so as to generate a data warehouse for the demand fields.

Abstract: The disclosure discloses a method and system for constructing and analyzing a knowledge graph of a wireless communication network protocol, and a device and a medium. The method for constructing and analyzing the knowledge graph of the wireless communication network protocol includes: defining entities and a relation between the entities according to endogenous factors of a wireless communication network protocol, defining a triplet based on the defined entities and the defined relation between the entities, and constructing a knowledge graph of the endogenous factors of the wireless communication network protocol based on the defined triplet; and performing association analysis between any nodes in the knowledge graph to acquire an association relation hidden between the endogenous factors of the wireless communication network protocol.

Abstract: Provided is an improved beam control method of an array antenna based on frequency diversity. The method includes: signals from a transmitter are received by a receiving array which includes a first sub-array and a second sub-array, wherein the first sub-array includes M uniformly arranged array elements, the second sub-array includes N uniformly arranged array elements, M and N are coprime integers, and N?0; a signal received by each array element in the receiving array is input into a constructed model, and a covariance matrix is output after processing the signal via the model; a virtual array is constructed at a receiver, wherein a virtual array element in the virtual array is a second-order statistic calculated according to the covariance matrix; and a frequency is randomly selected for each virtual array element from a frequency set of the virtual array, so as to form a beam pattern.

Abstract: The present disclosure relates to a method for coding on a time-space two-dimensional channels, in which the data bits to be transmitted are coded from the time-domain and the space-domain, respectively, to form time-space two-dimensional coding. the proposed coding operation in the space-domain and the time-domain can adopt different coding structures, coding rates and modulation constellations; subsequently, the system expresses each coding method with code words, merges the code words to form a space-time two-dimensional codebook, stores the codebook at both ends of the sending terminal and the receiving terminal; next, the sending terminal selects the coding structure according to the code words of the time-domain, and encodes each data stream according to time-domain coding rates, and eventually forms data blocks of an equal length in the time-domain through the rate matching.

Abstract: A communication method includes: determining, by a first device, a first synchronization signal, where the first synchronization signal is used by a second device for symbol timing alignment and frequency synchronization; and sending, by the first device, the first synchronization signal on each group of subcarriers of M groups of subcarriers, where M is a positive integer greater than or equal to 2. According to the communication method in this application, the first device sends the first synchronization signal on each group of subcarriers of a plurality of groups of subcarriers, so that the second device can select, based on a reception capability of the second device, an appropriate bandwidth to receive the first synchronization signal.

Abstract: A random access method and a device are provided, to enable a device in the Internet of Things to implement random access. The method includes: selecting, by a terminal from at least two frequencies, frequencies used to send a physical random access channel PRACH signal, as frequencies occupied by target PRACH resources, where the at least two frequencies each have a preset bandwidth, and there is no intersection between frequency bands of the at least two frequencies; generating, by the terminal, a target PRACH signal based on the frequencies occupied by the target PRACH resources, a root allocated by a base station, and a cyclic shift corresponding to the root allocated by the base station; and sending, by the terminal, the target PRACH signal to the base station on the target PRACH resources.

Abstract: This application provides a communication method and device. The method includes: determining, by a first device, a first synchronization signal, where the first synchronization signal is used by a second device for symbol timing alignment and frequency synchronization; and sending, by the first device, the first synchronization signal on each group of subcarriers of M groups of subcarriers, where M is a positive integer greater than or equal to 2. According to the communication method in this application, the first device sends the first synchronization signal on each group of subcarriers of a plurality of groups of subcarriers, so that the second device can select, based on a reception capability of the second device, an appropriate bandwidth to receive the first synchronization signal. In this way, a device with wideband reception performance and a device with narrowband reception performance can be supported.

Abstract: A random access method and a device are provided, to enable a device in the Internet of Things to implement random access. The method includes: selecting, by a terminal from at least two frequencies, frequencies used to send a physical random access channel PRACH signal, as frequencies occupied by target PRACH resources, where the at least two frequencies each have a preset bandwidth, and there is no intersection between frequency bands of the at least two frequencies; generating, by the terminal, a target PRACH signal based on the frequencies occupied by the target PRACH resources, a root allocated by a base station, and a cyclic shift corresponding to the root allocated by the base station; and sending, by the terminal, the target PRACH signal to the base station on the target PRACH resources.

Abstract: Disclosed is a main synchronization sequence design method for global covering multi-beam satellite LTE, comprising the follow steps: extending a standard Zadoff-Chu sequence to a generalized Zadoff-Chu sequence so as to obtain an initial candidate main synchronization sequence set of more candidate sequences; gradually narrowing down the candidate main synchronization sequence set according to a selection standard of a main synchronization sequence to obtain a final candidate main synchronization sequence set; and obtaining a main synchronization sequence set with optimal eclectic performance and complexity from the final candidate main synchronization sequence set. According to the present invention, a main synchronization sequence with optimal eclectic performance and calculation complexity can be designed for a global covering same-frequency networking multi-beam satellite LTE system.

Abstract: Disclosed is a main synchronization sequence design method for global covering multi-beam satellite LTE, comprising the follow steps: extending a standard Zadoff-Chu sequence to a generalized Zadoff-Chu sequence so as to obtain an initial candidate main synchronization sequence set of more candidate sequences; gradually narrowing down the candidate main synchronization sequence set according to a selection standard of a main synchronization sequence to obtain a final candidate main synchronization sequence set; and obtaining a main synchronization sequence set with optimal eclectic performance and complexity from the final candidate main synchronization sequence set. According to the present invention, a main synchronization sequence with optimal eclectic performance and calculation complexity can be designed for a global covering same-frequency networking multi-beam satellite LTE system.

Abstract: The present invention provides an Offset Modulation Orthogonal Frequency Division Multiplexing (OFDM) and multi-access transmission method with a Cyclic Prefix (CP), including a generating method of the sent signal in the sending terminal and a processing method of the received signal in the receiving terminal, the method includes: in the sending terminal, performing generalized discrete Fourier Transform on real-value digital baseband modulated symbols and obtaining the frequency-domain signal; performing conjugate symmetric extension, frequency-domain filtering, sub-carrier mapping on the frequency-domain signal; performing Inverse Fast Fourier Transform on the frequency-domain signal after sub-carrier mapping; inserting a CP and obtaining the time-domain sent signal; in the receiving terminal, including: removing the CP, performing Fast Fourier Transform on CP removed symbols and obtaining the frequency-domain received signal; and based on multiple user joint frequency-domain equalization performing iterat

Abstract: A Space Division Multiple Access transmission method based on a statistical characteristic pattern including configuring multiple receiving and transmitting antennae at a base station side into one or more antenna arrays; comparing a diagonalization performance among the unitary matrixes for a correlation matrix of subscriber channels, with a long-time statistical correlation matrix of the subscriber channels at the base station side; calculating an optimal diagonalized correlation matrix, and then performing characteristic pattern clustering for the subscribers in a cell with the space resource divisions of the subscribers; grouping the subscribers that belong to a same characteristic pattern cluster into space division subscriber groups; carrying out SDMA transmission, by the subscribers in a same space division subscriber group, with their space resource divisions; dynamically performing subscriber characteristic pattern clustering and space division subscriber grouping described above to generate updated