CN-122027000-A - Simulation analysis system and method for multi-user service capability of high orbit satellite

CN122027000ACN 122027000 ACN122027000 ACN 122027000ACN-122027000-A

Abstract

A simulation analysis system and method for multi-user service capability of high orbit satellite belongs to the technical field of satellite communication and solves the problem of how to perform simulation analysis on multi-user service capability in a high orbit satellite communication system; the invention takes the multi-user service requirement as the quantitative evaluation index of the multi-user service capability in the high orbit satellite communication system, gradually solves key parameters such as the maximum communication distance between satellites, the G/T value of the multi-beam requirement, the beam occupation bandwidth, the frequency design value, the G/T value of the multi-beam design and the like through modularization, and finally verifies whether the parallel data transmission quantity, the information rate and the like meet the multi-user data transmission requirement of the system through the multi-user service capability simulation analysis module, so that the evaluation of the core capability of the system, namely whether the parallel user quantity and the information rate can be met, is more accurate, systematic and objective.

Inventors

REN WEILONG
CHEN TIAN
ZHANG XIAO
YAO YANJUN
WU RUIRONG
HU SHUKAI
ZHANG ZHENGYU

Assignees

中国电子科技集团公司第三十八研究所

Dates

Publication Date: 20260512
Application Date: 20260317

Claims (8)

1.A high orbit satellite multi-user service capability simulation analysis system, comprising: the system parameter setting module is used for setting constraint parameters required by simulation analysis, including working frequency, antenna scanning angle, user information rate, user terminal EIRP, maximum inter-satellite working frequency, user satellite orbit, high orbit satellite position, ground station position and user quantity; The communication distance simulation analysis module is used for carrying out communication distance simulation analysis according to the parameters of the satellite orbit, the high orbit satellite position and the ground station position of the user as input and calculating the maximum communication distance between satellites and the maximum communication distance between the satellites; The link budget simulation analysis module is used for calculating a multi-beam demand G/T value and a beam occupation bandwidth required by the high orbit satellite phased array antenna according to the user information rate, the user terminal EIRP and the inter-satellite highest working frequency by combining the inter-satellite highest working frequency and the inter-satellite maximum communication distance as inputs; the inter-satellite frequency planning and designing module is used for carrying out inter-satellite multi-beam communication frequency planning according to the working frequency, the number of users and the bandwidth occupied by the beams as inputs and outputting a frequency design value; the phased array antenna simulation design module is used for carrying out phased array antenna design according to the working frequency, the antenna scanning angle and the multi-beam requirement G/T value as inputs, and calculating the multi-beam design G/T value as the design input of the multi-user service capability simulation analysis module; The multi-user service capability simulation analysis module is used for carrying out multi-user service capability simulation analysis by taking a multi-beam design G/T value and a frequency design value as input, calculating the star-to-ground transmission link budget and judging whether the system meets the parallel data transmission requirement of the system based on the link budget.
2. The simulation analysis system for multi-user service capability of high orbit satellite according to claim 1, wherein the maximum communication distance between satellites and the maximum communication distance between the satellites in the communication distance simulation analysis module are obtained by modeling and running simulation through satellite orbit simulation software.
3. The simulation analysis system for multi-user service capability of high-orbit satellite according to claim 1, wherein the link budget simulation analysis module is used for solving the multi-beam requirement G/T value of the high-orbit satellite phased array antenna for the return data transmission requirement of the user star according to a link calculation equation: Wherein, the For the multi-beam demand G/T value, E b /N 0 is the theoretical required demodulation threshold value, R b is the data transmission information rate, EIRP t is the user star equivalent omni-directional radiation power, L p is the path loss, expressed as , As a function of the wavelength of the signal, K is Boltzmann constant, L g is atmospheric absorption loss, L r is rain attenuation loss, and M is star-to-ground transmission link margin.
4. The simulation analysis system for multi-user service capability of high orbit satellite according to claim 1, wherein the beam occupation bandwidth Bs in the link budget simulation analysis module has the following calculation formula: Wherein R b is a data information rate, n is coding efficiency, m is modulation order, and alpha is roll-off coefficient.
5. The simulation analysis system for multi-user service capability of high orbit satellite according to claim 1, wherein the phased array antenna design in the phased array antenna simulation design module comprises a grid form, a cell spacing and an array scale design, and the specific process is as follows: Firstly, adopting a uniform and regular rectangular grid to arrange phased array antenna units; Secondly, designing the space between phased array antenna units, wherein the smaller the antenna scanning range is, the space between the antenna units is The larger the relationship between antenna element spacing and antenna scan range is represented by the following logic: Wherein, the Indicating the spacing of the antenna elements, Representing the number of phased array antenna elements, Indicating the wavelength of the signal, Representing a first grating lobe occurrence position; Then, the phased array antenna array scale is designed, and the antenna gain is increased The higher the phased array antenna array size, the larger the phased array antenna array size is represented by the logic described below : Wherein, the In order to achieve the light velocity, the light beam is, For the antenna frequency, For the purpose of the antenna efficiency, Is the antenna gain.
6. The simulation analysis system for multi-user service capability of high orbit satellite according to claim 5, wherein the antenna gain Represented by the following logic: Wherein, the For the system noise temperature, the following logic expression is utilized : Wherein, the In order to be the temperature of the noise of the antenna, As a feed line loss factor, As the physical temperature of the feed line, For the receiver equivalent noise temperature, take , Is the noise figure.
7. The simulation analysis system for multi-user service capability of high orbit satellite according to claim 1, wherein the simulation analysis module for multi-user service capability has a star-to-ground transmission link budget which is determined by a star-to-ground transmission link margin Representing the starground transmission link margin using the logic described below : Wherein, the The G/T values are designed for multiple beams.
8. A simulation analysis method using the high orbit satellite multi-user service capability simulation analysis system according to any one of claims 1 to 7, comprising the steps of: S1, determining system limiting conditions and corresponding parameters; S2, calculating the maximum communication distance between satellites and the maximum communication distance between the satellites as a link analysis limiting condition; s3, performing star-to-earth link budget analysis to obtain a G/T value and a beam occupation bandwidth of the high orbit satellite phased array multi-beam demand; S4, planning the number and the size of frequency bands in the working frequency range according to the number of multiple users and the bandwidth occupied by the beams, and meeting the requirement of the number of the multiple users; S5, designing and simulating a phased array antenna, including designing the cell spacing, the antenna array scale and the like, calculating a multi-beam design G/T value, and meeting the requirement of the multi-beam G/T value; s6, according to the G/T value of the multi-beam design, performing link budget analysis, enabling the star-to-ground link margin to meet the transmission requirement of the system, calculating the link margin and evaluating the service capability of the system.

Description

Simulation analysis system and method for multi-user service capability of high orbit satellite Technical Field The invention belongs to the technical field of satellite communication, and relates to a simulation analysis system and a simulation analysis method for multi-user service capability of a high orbit satellite. Background The high orbit satellite communication system has the characteristics of wide coverage, large transmission delay, high link loss and the like, and is widely applied to the fields of meteorological observation, military communication, broadcast service and the like. As shown in fig. 1, in a high-orbit satellite communication system, a high-orbit phased array antenna can form a plurality of return beams simultaneously to provide data transmission service for users, and user data is forwarded to a ground station through a high-orbit satellite, and is sent to an application center after being processed. When measuring the data transmission capability of the high-orbit satellite, the number of users and the information rate which can be simultaneously served are important evaluation indexes, and along with the increase of the demands of the number of users and the information rate, how to efficiently evaluate and optimize the multi-user service capability of the satellite becomes a key problem in the design of the high-orbit satellite communication system. In the prior art, a systematic and standardized simulation analysis method for the multi-user service capability of the high-orbit satellite is lacking, the service capability of the high-orbit satellite in a multi-user scene is difficult to quantitatively evaluate, and particularly, comprehensive simulation tools are lacking in the aspects of parallel user number, information rate, frequency resource utilization and the like, so that the system design optimization and decision support are influenced. The prior art discloses a satellite communication link analysis method under an in-orbit complex environment, which is characterized in that satellite attitude and orbit, structural layout configuration and component rotating mechanism, load antenna shielding, data transmission antenna shielding, whole satellite EMC environment is responsible for microwave equipment including C wave band, S frequency band, X frequency band and the like, satellite-ground communication link parameters, measurement and control antenna design, selection and the like are comprehensively considered, an accurate satellite model is constructed, and quantitative and refined measurement and control arc segment coverage characteristics are obtained through simulation by utilizing measurement and control antenna pattern information under an actual measurement star environment. However, the method is only suitable for single-user link budget of a single satellite in a complex star environment (such as large-angle side sway and antenna shielding), but lacks capacity modeling and analysis capability of a system level in a multi-user and multi-beam access scene, and is difficult to evaluate a large-scale and high-dynamic multi-user scene. Therefore, an integrated simulation analysis system and method for multi-user service capability of high-orbit satellite are needed, which provides powerful quantitative analysis tools and scientific and efficient decision support for demonstration, design and optimization of the high-orbit satellite system. Disclosure of Invention The technical problem to be solved by the invention is how to perform simulation analysis on multi-user service capability in a high orbit satellite communication system. The invention solves the technical problems through the following technical scheme: a high orbit satellite multi-user service capability simulation analysis system, comprising: the system parameter setting module is used for setting constraint parameters required by simulation analysis, including working frequency, antenna scanning angle, user information rate, user terminal EIRP, maximum inter-satellite working frequency, user satellite orbit, high orbit satellite position, ground station position and user quantity; The communication distance simulation analysis module is used for carrying out communication distance simulation analysis according to the parameters of the satellite orbit, the high orbit satellite position and the ground station position of the user as input and calculating the maximum communication distance between satellites and the maximum communication distance between the satellites; The link budget simulation analysis module is used for calculating a multi-beam demand G/T value and a beam occupation bandwidth required by the high orbit satellite phased array antenna according to the user information rate, the user terminal EIRP and the inter-satellite highest working frequency by combining the inter-satellite highest working frequency and the inter-satellite maximum communication distance as inputs; the inter-satellit