Secure Mimo Communication System with Frequency Hopping Aided OFDM-DCSK Modulation

Abstract

In this paper, a multiple-input multiple-output (MIMO) communication system with frequency hopping (FH) aided orthogonal frequency division multiplexing differential chaotic shift keying (OFDM-DCSK) modulation is proposed. Our objective is to improve the security of MIMO communication system which is encoded by space time block coding (STBC). In order to combat the eavesdropping or malicious attacks due to the broadcast characteristics of wireless communication system, we propose to use DCSK and FH modules to encrypt the information, and hide the user data in the chaotic sequences, where the initial value of chaotic sequences and the method of generating FH module are only shared among legitimate users. Moreover, we derive the bit error rate (BER) and the secrecy capacity of the scheme in additive white Gaussian noise (AWGN) channel and Rayleigh fading channel. Simulation results show that the proposed scheme can effectively improve the security of MIMO communication system, which can be seen from the BER of eavesdroppers and legitimate users, and the secrecy capacity of the proposed scheme and the benchmark schemes.

Design of a Short Reference Differential Chaotic Shift Keying Communication System Based on Reference Signal Scrambling Transformation

“…and (17) where ρ = Var x 2 k , it can be readily shown that all the covariance terms are zero. Thus, using the Formula (17), we may simplify (14) to…”

Design and Analysis of a Multi−Carrier Orthogonal Double Bit Rate Differential Chaotic Shift Keying Communication System

“…In order to combat the eavesdropping or malicious attacks due to the broadcast characteristics of wireless communication system, a MIMO communication system assisted by FH−OFDM−DCSK is designed [11] to advance the security of the MIMO communication system. A multi-user OFDM-DCSK system reduces the integration complexity of the system and improves the spectral efficiency [12].…”