Information security transmission method and device in high-throughput satellite communication system

A satellite communication system and information security technology, which is applied in the field of information security transmission in high-throughput satellite communication systems, can solve problems such as the difficulty of implementing complex structures of high-throughput satellite communication systems, and achieve the improvement of safety factor, flexibility, and improvement. The effect of safety features

Active Publication Date: 2021-07-13
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the traditional high-throughput satellite communication system has a complex structure and is difficult to implement

Method used

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  • Information security transmission method and device in high-throughput satellite communication system
  • Information security transmission method and device in high-throughput satellite communication system
  • Information security transmission method and device in high-throughput satellite communication system

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Embodiment 2

[0045] Embodiment 2: On the basis of Embodiment 1, in order to improve the security performance of the system in this embodiment, determining the beamforming weight vector using the beamforming method specifically includes the following steps:

[0046] Step 1: The gateway station obtains prior information such as the geographic location information of the satellite and various users through channel estimation technology, and obtains the statistical channel state information of the channel from the satellite to the legitimate user and the eavesdropper;

[0047]Step 2: Using the statistical channel state information obtained in step 1, the beamforming weight vector w is calculated with the maximum safe rate of the system as the objective function under the condition that the transmission power of a single high-throughput satellite feed is limited.

[0048] In order to make the technical solution among the present invention clearer, this solution is described in detail below:

[...

Embodiment 3

[0082] Embodiment 3: This embodiment provides an information security transmission device in a high-throughput satellite communication system. The high-throughput satellite communication system includes high-throughput satellites, gateway stations, legitimate users and eavesdroppers, and the device is configured in The gateway station includes a beamforming weight vector determination module and the signal security sending module;

[0083] The beamforming weight vector determining module is configured to determine the beamforming weight vector by using a beamforming method;

[0084] The signal security sending module is used to process the data signal of the legal user according to the obtained beamforming weight vector, and send the processed signal to the high-throughput satellite through the large-capacity photoelectric hybrid feeder link.

Embodiment 4

[0085] Embodiment 4: On the basis of Embodiment 3, the beamforming weight vector determination module in this embodiment includes a statistical channel state information acquisition module and a beamforming weight vector acquisition module;

[0086] The statistical channel state information acquisition module is used to obtain statistical channel state information from satellites to legal users and eavesdroppers;

[0087] The beamforming weight vector acquisition module is used to solve the calculation of the objective function under the condition that the transmission power of a single feed source of a high-throughput satellite is limited based on the acquired statistical channel state information, with the maximum safe rate of the system as the objective function Outgoing beamforming weight vector.

[0088] It should be noted that those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-des...

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Abstract

The invention provides an information security transmission method and device in a high-throughput satellite communication system. The high-throughput satellite communication system comprises a high-throughput satellite, a gateway station, a legal user and an eavesdropper; the method is configured in the gateway station, and the method comprises the following steps: determining a beam forming weight vector by using a beam forming method; processing the data signal of the legal user according to the determined beam forming weight vector, and sending the processed signal to a high-throughput satellite through a large-capacity photoelectric hybrid feed link. According to the method, all or part of beam forming tasks are transferred to the ground gateway station from the satellite to be completed. According to the ground-based beam forming technology, beams are formed through a ground gateway station, and multi-beam coverage of a service area is achieved. The operation complexity, the hardware complexity, the power consumption and the like which can be borne by the gateway station equipment are much higher than those of a satellite, so the cost and the implementation difficulty of a communication system can be integrally reduced, and the flexibility is remarkably improved.

Description

technical field [0001] The invention belongs to the field of wireless communication physical layer security, in particular to a method and device for secure information transmission in a high-throughput satellite communication system. Background technique [0002] With the increasing demand for high-speed data transmission and broadband information broadcasting services, high-throughput requirements and other diversified business needs, high-throughput satellites have multi-spot beams, available frequency bandwidth, frequency multiplexing, and high single-spot beam gain. , The communication capacity is 10 times to 100 times higher than that of traditional communication satellites, and has been widely used in various scenarios such as broadcasting, rescue, and military. However, due to the wide-area coverage and broadcasting characteristics of high-throughput satellite communication, the transmitted signals are extremely easy to be eavesdropped by illegal users, and the secur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04B7/0426H04W12/02
CPCH04B7/18513H04B7/18519H04B7/043H04W12/02Y02D30/70
Inventor 林敏解路瑶刘笑宇郭雨晴孔槐聪欧阳键
Owner NANJING UNIV OF POSTS & TELECOMM
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