Secure transmission method for double-satellite communication system
A satellite communication system and secure transmission technology, applied in the field of secure transmission for dual satellite communication systems, can solve problems affecting communication quality, signal fading, etc., and achieve the effects of improving security and reliability, reducing burden, and ensuring security
Active Publication Date: 2022-04-12
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
[0004] In addition, in the satellite communication system, affected by the shadow effect and multipath scattering, the signal received by the ground user presents fading characteristics, which affects its communication quality, and how to improve the reliability of communication is another technical problem in the field of satellite communication
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[0053] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0054] like Figure 1-2 As shown, a secure transmission method for a dual-satellite communication system, including:
[0055] Obtain the perfect channel information of known legitimate users and the imperfect channel information of eavesdroppers;
[0056] Aiming at the maximum security rate of the dual-satellite communication system, the security interruption probability constraints, transmission rate constraints, and satellite maximum transmission power constraints of information transmission between legal users and satellites are added to establish a security system with beamforming weight vectors as variables. Transport problem model;
[0057] The expression formula of the outage probabili...
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The invention discloses a secure transmission method for a double-satellite communication system in the technical field of wireless communication. The secure transmission method comprises the following steps: acquiring perfect channel information of a legal user and imperfect channel information of an eavesdropper; establishing a secure transmission problem model taking a beam forming weight vector as a variable; considering uncertainty caused by imperfect channel information of an eavesdropper, and introducing a security outage probability constraint condition; according to the actual condition of each satellite in the double-satellite communication system, solving the secure transmission problem model to obtain a beam forming weight vector; after space-time coding is carried out on user signals, the user signals are multiplied by the obtained beamforming weight vectors, the user signals are sent to corresponding satellites and forwarded to ground users through the satellites, the communication quality of a double-satellite communication system is guaranteed, and meanwhile the safety and reliability of information transmission between legal users and the satellites are improved.
Description
technical field [0001] The invention belongs to the field of satellite communication, and in particular relates to a secure transmission method for a dual-satellite communication system. Background technique [0002] With its advantages of wide coverage, no geographical influence and large communication capacity, satellite communication has shown broad application prospects in the fields of communication, navigation and disaster relief in remote areas. However, due to the inherent broadcast characteristics and wide-area coverage of satellites, their security issues have received extensive attention. [0003] The premise of the traditional upper-layer encryption method is that the eavesdropper has limited computing power and cannot decipher the encryption algorithm. However, with the development of quantum computing and the enhancement of computing power of eavesdroppers, the traditional key mechanism has become difficult to guarantee the secure transmission of signals. Dif...
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IPC IPC(8): H04B7/185H04W12/02H04W12/122
CPCY02D30/70
Inventor 林敏肖圣杰李艳丽曹李莉黄硕阚鹏程欧阳键
Owner NANJING UNIV OF POSTS & TELECOMM