Pre-coding method, based on safety speed optimization, in multi-base-station cooperation scenes

A security rate, multi-base station technology, applied in the field of precoding information processing based on security rate optimization, can solve the problem of insufficient research on precoding methods

Inactive Publication Date: 2014-01-29
SHANGHAI NORMAL UNIVERSITY
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Problems solved by technology

[0008] It can be seen that there is not much research on the precoding method for optimizing the security rate in the scenario of multi-

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  • Pre-coding method, based on safety speed optimization, in multi-base-station cooperation scenes
  • Pre-coding method, based on safety speed optimization, in multi-base-station cooperation scenes
  • Pre-coding method, based on safety speed optimization, in multi-base-station cooperation scenes

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Embodiment Construction

[0044] Below in conjunction with accompanying drawing and embodiment the method of the present invention is further described

[0045] This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0046] The structure of the communication system applied in the present invention includes K base stations, a user and an eavesdropper, and a central processing unit for signal processing.

[0047] The wireless communication system in the following embodiments specifically includes two base stations, one user and one eavesdropper. At the same time, the number of antennas of base station, user and eavesdropper is 2, and the system adopts Rayleigh flat fading channel. The signal power to be sent is The received noise of all users and eavesdroppers is complex white Gaussian noise with...

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Abstract

The invention discloses a pre-coding method, based on safety speed optimization, in multi-base-station cooperation scenes, particularly relates to a pre-coding information processing method, based on safety speed optimization, in multi-base-station cooperation scenes, and relates to the technical field of wireless communication pre-coding. The method includes: each base station transmits a training sequence to a user, and a transceiver of the user and an eavesdropper performs channel estimation according to the received signals so as to obtain the channel information between each base station and the user and the channel information between each base station and the eavesdropper; a central processing unit calculates the pre-coding matrixes of all base stations according to the obtained channel information, and feeds each pre-coding matrix to the corresponding base station; each base station pre-codes the same signal and transmits the pre-coded signal to the user; the user and the eavesdropper detect the received signals and estimate the transmitted signals. By the method, safety speed of the maximum systems of the pre-coding matrixes of the base stations are obtained simultaneously, the defect that traditional iteration algorithms cannot guarantee that the obtained solution is the optimal global solution, and system safety speed can be increased effectively.

Description

technical field [0001] The present invention relates to the technical field of wireless communication precoding, in particular to a precoding information processing method based on security rate optimization in multi-base station cooperation scenarios. Background technique [0002] In wireless communication, due to the openness of the wireless medium, the security of data transmission becomes more challenging, and it is a topic that needs to be studied in depth. For a long time in the past, scholars have been committed to using encryption methods to ensure the safe transmission of information. This encryption algorithm is usually based on a predetermined protocol. However, for WIFI (Wireless Fidelity) and user-to-user direct communication type, it is difficult to implement such a protocol because their entry and exit are random. Therefore, the information security problem based on the physical layer has gradually attracted the attention of researchers. [0003] The origina...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04L25/02
Inventor 苗萌李莉周涛张静罗汉文
Owner SHANGHAI NORMAL UNIVERSITY
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