I/Q domain modulation method, dual-domain modulation method and multiple access communication method

Abstract

The invention discloses an I / Q domain modulation method, a dual-domain modulation method and a multiple access communication method depending on a spatial position, and belongs to the technical fieldof communication. According to the method, the dependence of physical layer safety communication on channel state information is eliminated, and the functions that a receiver at the expected positioncan normally communicate, and eavesdroppers at other positions cannot receive signals or can only receive error signals are achieved. The security capability of the wireless communication system is improved in space dimension. According to the multiple access communication method provided by the invention, multiple users can be distinguished according to the spatial accurate position points. Evenif a plurality of users are located in the same angle domain sector, as long as the spatial positions of the users are different, the method provided by the invention can be used for carrying out multiple access communication, so that the spatial reuse rate of the system is further improved, and the capacity of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to an I / Q domain modulation method, a dual domain modulation method and a multiple address communication method depending on spatial positions. Background technique [0002] Traditional wireless communication always faces the risk of being intercepted by eavesdropping. The traditional anti-eavesdropping interception method is upper-layer encryption and authentication. However, with the increasing computing power, the security of upper-layer encryption and authentication technology is facing unprecedented challenges. Therefore, academia and industry have proposed the concept of physical layer security communication, moving the security gate forward to the physical layer, using the rich randomness of the physical layer, combined with the inherent modulation and coding technology of the physical layer, to develop a secure communication system in a new dimension desig...

AI Technical Summary

Problems solved by technology

Even in the TDD slow fading channel, when a large number of scatterers exist, since the scatterers incident from different directions will show different scattering characteristics, the reciprocity of the channel is difficult to be satisfied

There are also inevitable problems in channel feedback technology: high-precision channel feedback needs to occupy the reverse channel bandwidth and consume a lot of bandwidth resources

However, traditional SDMA can only distinguish users in the angle domain. When multiple users are located in the same sector, they cannot distinguish multiple users through spatial beams.

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