Spatial Location Dependent Phase Domain Modulation Methods

Abstract

The invention discloses a phase domain modulation method dependent on a space position, which belongs to the technical field of communication. The method of the present invention mainly includes the following steps: the transmitter and the receiver perform time synchronization to obtain the synchronization time; the transmitter performs phase domain precoding operation on the original signal to obtain the phase domain precoded signal; the receiver receives the phase domain precoded signal After the signal, the initial received signal in the phase domain is obtained, and the phase domain matching operation is performed on the initial received signal in the phase domain to obtain an estimate of the original signal. The phase domain signal processing method of the present invention achieves the purpose of safe communication without reducing the power efficiency of the system. It can eliminate the dependence of the physical layer security communication system on the channel state information, and realize the security in the distance domain, so that the receiver at the expected distance can receive the correct signal, while the receiver at other distances cannot receive the correct signal .

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a phase domain modulation method dependent on a space position. Background technique [0002] Traditional anti-interception and anti-spoofing methods rely on encryption and authentication technologies above the network layer. However, with the improvement of computing power, the upper layer encryption and authentication technologies are facing severe challenges. For example: secret key management, distribution and maintenance are difficult; long secret keys cause high computing overhead and resource waste; the improvement of eavesdropping capabilities makes the upper layer encryption method based on computational complexity face threats. In order to deal with these problems, physical layer security communication is proposed at home and abroad, the security gate is moved forward, and the randomness (interference, noise, etc.) of the physical layer itself is used ...

AI Technical Summary

Problems solved by technology

However, most of the existing physical layer security communication technologies rely on the reciprocity of the wireless channel, but the reciprocity of the channel is difficult to be strictly satisfied

Existing airspace physical layer security technologies, such as spatial beamforming and directional modulation, can get rid of the limitation of channel reciprocity, but they can only provide security performance in the angle domain. If the eavesdropper and our receiver are located at the same direction angle, is not safe

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