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Robustness safety design method for multiple input multiple output (MIMO) communication system

A communication system and security design technology, applied in the field of wireless energy transmission and wireless communication, can solve the problems of eavesdropping on legitimate information of RF signals and limited computing power of eavesdroppers

Active Publication Date: 2016-01-20
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] Due to the openness of wireless communication networks, the legitimate information carried in RF signals is easily eavesdropped by malicious eavesdroppers
Traditional secure communication methods are often independent of the physical layer and have certain defects, that is, they all assume that the eavesdropper has limited computing power

Method used

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  • Robustness safety design method for multiple input multiple output (MIMO) communication system
  • Robustness safety design method for multiple input multiple output (MIMO) communication system

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Embodiment Construction

[0033] The invention will be described in further detail below in conjunction with the accompanying drawings.

[0034] like figure 1 As shown, the downlink MIMO communication system of the present invention includes: a configuration with N t The transmitting end of the root antenna, and multiple receiving ends. The receiving end is divided into two types: one is configured with N d The destination receiving end of the root antenna, each of which is configured with N e The idle receiving end of the root antenna. Both receivers are configured as figure 2 The power splitter shown divides the received signal power into two parts: one part is used for information decoding and the other part is used for energy harvesting. When the receiver is in an idle state, it expects to collect energy to supplement its own energy consumption. At the same time, it may also become a potential eavesdropper due to malicious eavesdropping on legitimate information sent to the destination. The...

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Abstract

The invention discloses a robustness safety design method for a multiple input multiple output (MIMO) communication system. Receiving terminals of the method are each provided with a power separator that divides the received power to realize information decoding of the receiving terminal and energy collection simultaneously. If an idle receiving terminal is a potential eavesdropper, a sending terminal adopts methods of precoding and introducing artificial noise, thereby effectively improving system security rate and transfer efficiency of system energy. When the sending terminal only knows part of channel status information of the idle receiving terminal, the robustness safety design is described as a non-convex semi-infinite optimization problem. The non-convex semi-infinite optimization problem can be changed into a positive semi-definite relaxation problem by use of first order Taylor expansion and S-Procedure theorem, and the effective robustness safety design method can be finally provided through a convex optimization tool based iterative algorithm. With safe communication of the system guaranteed, the safety rate of the sytesm is improved remarkably, the energy transfer efficiency of the system is improved, and the communication and energy demands of the user are better met.

Description

technical field [0001] The invention relates to the technical fields of wireless energy transmission and wireless communication, in particular to a robust security design method for a downlink MIMO communication system based on synchronous transmission of information energy. Background technique [0002] The current explosive growth of high-speed wireless communications has increased the energy demands on communication networks. However, mobile terminals are often powered by batteries with limited energy storage, which causes a bottleneck in the life cycle of the network. Therefore, communication devices with energy harvesting capabilities are considered to be a promising alternative to provide self-sustainable development for energy-constrained communication systems. In practice, there are many renewable energy sources that can be used for energy harvesting, including solar, tidal, geothermal, wind, etc. However, these energy sources are often limited by geographic locati...

Claims

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Application Information

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IPC IPC(8): H04W12/02H04W56/00H04W52/04
CPCH04W12/02H04W52/04H04W56/00H04W56/003
Inventor 王保云王少行
Owner NANJING UNIV OF POSTS & TELECOMM
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