Non-orthogonal multiple access authentication system based on shared physical layer authentication tag

Abstract

The invention provides a non-orthogonal multiple access authentication system based on a shared physical layer authentication tag, and the system comprises a transmitting device which transmits a first carrier signal which comprises an authentication label and a plurality of pieces of user information, and the first carrier signal obtains a second carrier signal through a wireless fading channel;a plurality of user devices, the plurality of user devices respectively receiving a second carrier signal, obtaining channel estimation and preset target user information based on the second carrier signal so as to obtain a target authentication label, a residual signal and a test statistic. Based on channel estimation, each user device obtains a signal-to-interference-and-noise ratio and then obtains an outage probability, each user device obtains a false alarm probability, an optimal threshold value and a detection probability based on test statistics and hypothesis test conditions, and system performance is detected based on the outage probability and the detection probability.

Description

technical field [0001] The present disclosure relates to a non-orthogonal multiple access authentication system based on shared physical layer authentication tags. Background technique [0002] Non-Orthogonal Multiple Access (NOMA) technology is a key technology in the new radio (NR) access technology of the fifth generation (5G) wireless network. NOMA technology can achieve large-scale user access, meet the sharply increasing demand for heterogeneous data traffic, and provide high bandwidth efficiency and ultra-low latency services. In addition, NOMA has been included in the 5G NR standard, the 3rd Generation Partnership Project Long Term Evolution Advanced (3GPP-LTE-A) standard, and the next-generation Universal Digital Television Standard (ATSC 3.0). NOMA technology has excellent performance. Compared with traditional Orthogonal Multiple Access (OMA) schemes (such as Time Division Multiple Access (TDMA), etc.), the NOMA system supports each orthogonal resource block (suc...

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Problems solved by technology

[0004] In the existing NOMA technology, security authentication is usually achieved through the traditional encryption technology in the upper layer; however, there are often three main problems in the NOMA system that hinder the implementation of security authentication

The first problem is that the security of the upper-layer encryption mechanism is established based on the assumption that the adversary has limited computing power; however, with the advancement of computing power and cryptanalysis algorithms, the assumption of computational limitations in cryptography is gradually broken

The second issue is one of efficiency, since various time-consuming tasks are unavoidable at the upper and physical layers (PHY) before the transmitter can be verified

The third issue involves compatibility issues, as wireless devices produced by different manufacturers vary, and a lack of understanding of different digital languages ​​and upper-level communication programs hinders large-scale connectivity in the NOMA system

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