Multi-domain cooperative communication system of satellites and land

A collaborative communication and satellite communication technology, applied in the field of wireless communication and wireless network services, can solve the problems of insufficient coverage of base stations and low utilization efficiency of spectrum resources, etc., achieve reliable call services and data transmission services, wide application range, and flexibility high effect

Active Publication Date: 2015-06-03
TSINGHUA UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a satellite-terrestrial cooperative communication system, aiming at solving the problems of insufficient coverage of base stations in remote land areas and ocean areas, and low utilization efficiency of spectrum resources

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  • Multi-domain cooperative communication system of satellites and land
  • Multi-domain cooperative communication system of satellites and land
  • Multi-domain cooperative communication system of satellites and land

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Embodiment Construction

[0036] The feature of the present invention is: a communication system that provides reliable communication and wireless network services for remote areas that are not covered by base stations or have insufficient coverage by utilizing low-orbit communication satellites and terrestrial communication systems for coordinated processing. Use the space-time reference control unit to correct the fixed delay error caused by the satellite height and channel transmission, and realize the alignment of time stamps; use the delay prediction module to obtain the orbit delay model by predicting the movement of low-orbit satellites in the communication process, and solve the problem The problem of communication delay estimation due to the fast movement of low-orbit satellites; by using the land and satellite cooperative processing method, by using the time synchronization information obtained by the space-time reference unit and the delay prediction unit, interference elimination is performed...

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Abstract

The invention relates to a multi-domain cooperative communication system of satellites and land and belongs to the technical field of cooperative communication of low-orbit communication satellites and a land base station. The system is characterized in that the satellites and the base station carry out cooperative communication; the satellites combine signals transmitted from all satellite users in a remote suburb and an urban area and transmit the signals to a ground combined processing part via ground receiving parts; space-time reference units calculate total transmission delay according to a transmission timestamp of a combined signal, transmission delay caused by an orbital altitude and transmission delay between the base station and the combined processing part; orbital prediction models in delay predication modules output orbital motion delay according to on-orbit altitude information and motion speed; and signals output by interference elimination modules and transmitted to the satellite users in the remote suburb at a next moment t2 according to the transmission delay and the orbital motion delay are obtained by subtracting satellite communication signals received by the satellite users in the urban area at the moment t2 from signals received by the ground at the moment t2 after the two delays. The system achieves complete coverage of the satellite communication signals in the remote suburb.

Description

technical field [0001] The present invention provides a satellite and terrestrial multi-domain cooperative communication system, which relates to the technical field of wireless communication and satellite communication, and particularly relates to the use of low-orbit communication satellites and terrestrial communication systems to work together to realize remote areas with insufficient base station coverage and provide good , reliable wireless communication and wireless network services. Background technique [0002] With the continuous development of wireless communication technology and Internet technology, the wireless communication system has gradually transitioned from 3G to 4G, which has increased the data transmission rate. As the traffic of multimedia services such as video and images in network transmission continues to increase, the number of users accessing the network through WLANs continues to increase, resulting in a great contradiction between spectrum reso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/18H04W84/06H04B7/185
CPCH04B7/18523H04W16/18H04W84/06
Inventor 陆建华陶晓明葛宁繆亚男
Owner TSINGHUA UNIV
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