Creative Approaches Towards Development of Computing and Multidisciplinary IT Solutions for Society

19Security for 5G Networks is Based on Pseudo-Random Sequences

Long Tran Huy^1*, Quynh Le Chi², Canh Duong Tran³, Chinh Tran Thien¹, Ngoc Le², Anh Thu Le², Huy Le² and Phuong Thao Le²

¹Posts and Telecommunications Institute of Technology, Hanoi, Vietnam

²Swinburne Vietnam, FPT University, Hanoi, Vietnam

³Hanoi University of Natural Resources and Environment, Hanoi, Vietnam

Abstract

The synchronous signal is shuffled to increase randomness or whiten the spectrum of the transmitted signal sequence. The synchronous scrambler uses an additive linear feedback shift register (LFSR). This paper uses an effective mathematical tool to describe Pseudo-random Noise-PN, which is finite field theory, and D transform, then develops an algorithm to generate pseudo-random sequences to implement a synchronized signal scrambler. Simulations are performed for some specific cases for two pseudo-random sequences m corresponding to polynomials of order 8 from which the sequence is determined after signal scrambling. Signal mixing can use m-series corresponding to higher-order polynomials.

Keywords: LFSR-linear feedback shift register, PN sequence, scrambler

19.1 Introduction

Signal shuffling was employed to enhance the randomness or spectral whitening of the transmitted signal sequence. Scramblers have extensive applications in various domains, including information security, system identification and control, channel selection, and mobile communication. Scramblers can be classified into two types: ...