Dynamic direction modulation method based on four-dimensional antenna array

Abstract

The invention discloses a dynamic direction modulation method based on a four-dimensional antenna array. The basic system of the method comprises an antenna array, a radio frequency switch, a switch management system, a power divider and a local oscillator signal source. The biggest innovation of the invention lies in that dynamic direction modulation is realized on the four-dimensional antenna array, so that in the whole signal transmitting process, a standard signal is received in an expected direction and a signal received in a non-expected direction is dynamically and randomly distorted, and the confidentiality of the system is greatly enhanced. Moreover, the modulation of the signal is directly completed at the antenna end, and the expected direction of the transmitted signal can alsobe randomly adjusted by the radio frequency switch. Compared with an existing physical layer secret communication mode, the method has the advantages that a physical system is simple in structure andlow in cost, and a higher secret effect is achieved. The present invention is used in a wireless communication system.

Description

technical field [0001] The invention belongs to the field of wireless communication, and particularly relates to realizing dynamic direction modulation by using a four-dimensional antenna array. Background technique [0002] The rapid development of wireless communication technology has greatly promoted the progress of productivity. At the same time, the consequences caused by data confidentiality are becoming more and more serious, so the security of wireless communication is getting more and more attention. The signals transmitted by traditional antennas or antenna arrays carry the same information in different directions, and the only difference between the signals transmitted in different directions is the signal power level and time delay. In theory, a receiver with sufficient sensitivity can capture the information carried by the electromagnetic waves emitted in the sidelobe direction of the antenna array. Suppressing the sidelobe level (SLL) can reduce the signal-to...

AI Technical Summary

Problems solved by technology

This scheme provides a new four-dimensional antenna array security communication method, which makes up for the problems of the existing direction modulation system, such as low precision, insufficient security, low flexibility, complex system and difficult implementation.

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