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Uplink multi-user detection method for multi-beam satellite mobile communication system

A technology for satellite mobile communication and multi-user detection, which is applied in the field of satellite mobile communication to achieve the effect of reducing the number, reducing computational complexity, and improving performance

Active Publication Date: 2021-12-31
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: how to solve the problem of uplink user detection in the satellite mobile communication system, and provides a multi-beam satellite mobile communication system uplink multi-user detection method, which is simple and effective, and reduces the required pilot frequency and channel The estimated number greatly reduces the computational complexity of the detector, has better anti-interference performance, and the system model of the receiving end is simpler

Method used

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  • Uplink multi-user detection method for multi-beam satellite mobile communication system

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Embodiment Construction

[0045] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0046] Assuming that a large-scale antenna array is configured on the satellite side, N is generated by beamforming B A one-dimensional uplink receiving beam, such as figure 1shown. One user in each beam uses the same time-frequency resources to transmit uplink signals to the satellite, and a single antenna is configured on the user side. In the satellite transmission channel, the scatterers are distributed near the ground terminal, and the angle spread of each user's uplink signal reaching the satellite is very small.

[0047] The uplink received signal can be expressed as:

[0048]

[0049] in, means N ...

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Abstract

The invention discloses an uplink multi-user detection method for a multi-beam satellite mobile communication system, and belongs to the technical field of satellite mobile communication. The method comprises the following steps of firstly, constructing a system model of multi-beam satellite communication, simplifying an uplink receiving channel matrix by utilizing the characteristic of energy concentration of an uplink beam domain channel, enabling the uplink receiving channel matrix to be equivalent to a periodic N diagonal matrix, and reducing the calculation complexity in LMMSE detection by utilizing a Jacobi iteration method. According to the uplink multi-user detection method, the system model is simplified, the number of required pilot frequency and channel estimation is effectively reduced, and the calculation complexity of a multi-user MMSE detector is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of satellite mobile communication, in particular to an uplink multi-user detection method of a multi-beam satellite mobile communication system. Background technique [0002] Satellite mobile communication has the advantages of large coverage area and strong terrain adaptability. It can form a space-ground integrated communication network with seamless global coverage, so as to meet the ubiquitous multi-user service needs of users, and has developed rapidly in recent years. In order to improve the performance of the satellite mobile communication system, based on the high-capacity demand of the satellite service, the combination of the satellite system and the terrestrial MIMO technology can be considered. [0003] Through the introduction of the space dimension, MIMO technology can significantly improve the frequency band utilization without increasing the system transmission power and system bandwidth. Aft...

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Application Information

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IPC IPC(8): H04B7/185H04B7/0413H04B7/0426H04B17/391
CPCH04B7/1853H04B7/18534H04B7/18532H04B7/0413H04B7/043H04B17/391Y02D30/70
Inventor 王昕郑生华姚艳军任伟龙贺超章明明王文哲胡娜娜黄永华程仕发
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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