Design method and device of a hybrid beamforming filter based on millimeter wave mimo system security communication

Abstract

The invention discloses a design method and a device of a hybrid beamforming filter based on the safe communication of a millimeter wave MIMO system. The method includes: whether there is an eavesdropping channel is judged, if yes, analog beamforming filters are constructed according to the MIMO channel information corresponding to the eavesdropping end, otherwise the MIMO channel information ofthe legal channel is directly set as the initial matrix of iterative solution, and the analog beamforming filters are constructed. The digital beamforming filters obtained are all based on the SVD method. Based on the sparsity of millimeter wave channel and the limitations of analog filter design in millimeter wave system, considering the awareness of eavesdropping channel information, analog beamforming filter based on code-local joint selection of sender and receiver can improve the security capacity of MIMO system easily and efficiently, and make the mature physical layer security technology in traditional MIMO system, namely beamforming technology, be better transplanted to millimeter wave MIMO system.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a design method and device of a hybrid beamforming filter based on millimeter-wave MIMO system security communication. Background technique [0002] Compared with traditional communication methods, millimeter wave communication can provide higher bandwidth and is an important technical support for future 5G communication networks. In order to overcome the short-wavelength attenuation of the millimeter wave system, a Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Output) antenna array is generally used to transmit signals. According to the hardware configuration of a traditional communication system, each antenna needs to be equipped with a radio frequency (RF, Radio Frequency) chain, and the system must include a large number of antennas, which is difficult to implement in practical applications. Therefore, it is more economical to apply the...

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a design method of a hybrid beamforming filter based on millimeter-wave MIMO system security communication, to solve the problem that the existing beamforming security technology cannot be applied to the millimeter-wave MIMO system The problem

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