BER performance enhancement for secure wireless optical communication systems based on chaotic MIMO techniques

Abdulameer, Lwaa Faisal; Jignesh, Jokhakar; Sripati, U.; Kulkarni, Muralidhar

doi:10.1007/s11071-013-1044-z

Cited by 8 publications

(2 citation statements)

References 11 publications

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“…Since Fowler et al [3] came up with the concept of complex chaos in 1982, many studies have been proposed in the field of new complex chaotic systems (CCS) and their applications [4][5][6][7][8][9][10][11][12]. Some actual physical models also were discovered as CCS, such as amplitudes of electromagnetic and detuned laser systems [13][14][15][16][17]. The number of the variables in CCS is twice as many as real chaotic systems (RCS), which is the major difference between RCS and CCS.…”

Section: Introductionmentioning

confidence: 99%

Secure Communication of Fractional Complex Chaotic Systems Based on Fractional Difference Function Synchronization

et al. 2019

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Fractional complex chaotic systems have attracted great interest recently. However, most of scholars adopted integer real chaotic system and fractional real and integer complex chaotic systems to improve the security of communication. In this paper, the advantages of fractional complex chaotic synchronization (FCCS) in secure communication are firstly demonstrated. To begin with, we propose the definition of fractional difference function synchronization (FDFS) according to difference function synchronization (DFS) of integer complex chaotic systems. FDFS makes communication secure based on FCCS possible. Then we design corresponding controller and present a general communication scheme based on FDFS. Finally, we respectively accomplish simulations which transmit analog signal, digital signal, voice signal, and image signal. Especially for image signal, we give a novel image cryptosystem based on FDFS. The results demonstrate the superiority and good performances of FDFS in secure communication.

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Section: Introductionmentioning

confidence: 99%

Secure Communication of Fractional Complex Chaotic Systems Based on Fractional Difference Function Synchronization

et al. 2019

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“…Since all the received signals should be in same phase for MRC; therefore, channel estimators play important role in MRC technique. Performance of antenna diversity techniques for chaos based CDMA system in various environments is studied in [14]. The role of channel estimator in MRC technique is shown in [1].…”

Section: Introductionmentioning

confidence: 99%

Antijamming Performance of Adaptive Chaos Based CDMA System with MRC in Imperfect Channel Estimation Environment

Patel

Berber

Sowerby

2017

Wireless Communications and Mobile Computing

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This paper presents the antijamming performance of adaptive multiuser DS-CDMA system using maximal ratio combining technique in slow switching pulse noise jammer. Complex flat fading channel coefficients are assumed to be unknown at the receiver. Pilot symbols are used to estimate the fading coefficients using least mean square (LMS) algorithm, and effect of imperfect channel estimation on bit error rate (BER) is studied. Under the perfect synchronization conditions, probability of error in closed form is derived.

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A comparative study on the performance of MIMO‐STBC subject to Weibull fading channels

Bouanani

Bessate

2018

Int J Communication

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In this paper, we investigate the analytical performance of the multiple-input multiple-output system (MIMO) with orthogonal space-time block codes (STBCs) subject to Weibull fading channels (WFC). Space-time block code technique provides an efficient pattern for wireless transmission over various fading channels using multiple transmit antennas. Two approximating methods of the sum of independent Weibull random variables are studied. For each approach, we derive accurate approximate expressions for several performance metrics of MIMO-STBC system operating under independent and nonidentical WFC. The proposed approximations are expressed in terms of 2 generalized hypergeometric functions, namely, Fox's H and Meijer's G functions. All the derived approximate expressions prove high accuracy, while compared with the simulation results established via Monte Carlo method and Kolmogorov-Smirnov test as well.Although the 2 approaches have approximately the same accuracy, the second method approximate expressions are much less complex than those of the first method. KEYWORDS channel capacity, Fox's H function, Meijer's G function, MIMO-STBC, probability density function (PDF), symbol error rate, outage probability, Weibull fading channels (WFC) | INTRODUCTIONTo overcome the problem of transmit diversity technique for the multiple-input multiple-output (MIMO) systems, several interesting coding and modulation techniques have been attacked in various ways recently. One famous modulation scheme is the orthogonal space-time block codes (STBCs). 1 A generalization of STBC has been investigated later in Tarokh et al. 2 Based on several studies, it is proven that the STBC can ensure the same diversity order as maximal-ratio combining (MRC). On the other hand, the monopath channel capacity is known to be less than the one of MIMO system. 3 The main advantage of STBCs is that the maximum probability decoding can be reached using a linear processing at the receiver. 4 Shin and Lee 5 analyzed, using the moment-generating function-based approach, the exact average symbol error rate (ASER) of MIMO-STBC system with some modulation schemes under Nakagami-m fading channels. In Pérez et al, 6 accurate approximate outage capacities of MIMO-STBC over several kinds of fading distribution such as Rayleigh, Rice, Nakagami-m, and Weibull were derived. The channel capacities under adaptive transmission policy of MIMO-STBC operating under Rayleigh fading channels were derived in closed form in Maaref and Aissa. 7 In addition to the small-scale fading, the shadowing, ie, large-scale fading, can affect the signal during its propagation, which will extremely reduce the advantages of MIMO system. In Yang, 8 the shadowing was modeled via the lognormal

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BER performance enhancement for secure wireless optical communication systems based on chaotic MIMO techniques

Cited by 8 publications

References 11 publications

Secure Communication of Fractional Complex Chaotic Systems Based on Fractional Difference Function Synchronization

Secure Communication of Fractional Complex Chaotic Systems Based on Fractional Difference Function Synchronization

Antijamming Performance of Adaptive Chaos Based CDMA System with MRC in Imperfect Channel Estimation Environment

A comparative study on the performance of MIMO‐STBC subject to Weibull fading channels

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