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The standard compact Genetic Algorithm uses competition between two individuals for which we calculate the objective function and the winner will be the one who gives the best value of this function. This work presents a new approach of compact Genetic Algorithm that uses more than just two vectors of competition; it introduces tournament selection with larger size using mutation. We apply this algorithm...
The digital environments for human learning have been much evolving thanks to the incredible progress of information technologies. This is particularly the case for automatic correction of spelling errors requested by a large majority of people nowadays. Almost all of the current spellcheckers are semiautomatic, and they enable users to find the good solution for a committed error. The major shortcoming...
The security issues of RFID technology have been subject of a large number of research documents for over a decade. Several protocols have been developed to ensure reliable access control, namely a family of lightweight authentication protocols since Hopper and Blum proposed the HB protocol in 2001. Taking into account security and performance aspects, we present a new protocol derived from HB+ in...
Selection pressure controls the selection of individuals from one population to the next. It gives individuals of higher quality, higher probability of being used to create the next generation, and so for the algorithm to focus on promising regions in the search space. This paper introduces higher selection pressure to soft-decision decoding based on compact Genetic Algorithms(cGAD), and shows the...
In [6], a construction of cyclic one-step majority-logic decodable codes based on idempotent polynomials is given. However, the search for the feasible Parity-Check Idempotent runs through all possible combinations of cyclotomic cosets modulo n, satisfying some algebraic constraints, consequently, increasing the code length may result in very large dimension space search, and the search for the solution...
Security issue occupies an important part in all communication system and especially for new generation networks. Among these networks, we find Delay Tolerant Mobile Networks (DTMNs) which are a class of useful but challenging networks. Combining Network Coding (NC) and clustering for routing in such networks gives more efficiency and copes with routing reliability problem among large scale networks...
Analytical performance evaluation of a digital communication system remains a serious problem especially when a sophisticated digital signal processing is considered. Moreover, it is difficult to obtain the expected performance of such system using the Monte Carlo simulation method. In this paper, we propose a new semi-analytical approach for predicting error probability in a digital communication...
Network coding is a novel technique that aims to improve routing schemes' throughput. Besides, clustering is used to cope with the scalability problem among high scale networks. This paper combines the use of both techniques to address routing problem in Delay Tolerant Mobile Networks (DTMN). By the mean of its routing, the cluster based routing protocol we use offers opportunities for principal network...
Hybrid ARQ is defined as the joint use of a retransmission protocol ARQ and forward error coding (FEC) at the transmitter and/or receiver. We will focus on the HARQ-type-II protocols, namely type-II-CC (Chase Combining) characterized by a storage and combination of erroneous packets, and the type-II-IR (Incremental Redundancy) which provides an Incremental Redundancy strategy that helps to increase...
RFID technology attracts strong interest worldwide; it provides a means for automatic identification of objects and is regarded as an indispensable part in the vision of the Internet of things. With the aid of RFID systems, life shall become more convenient and businesses shall become more productive. The low cost RFID technology faces serious security and privacy threats, wireless communication and...
This paper proposes a new STBC MIMO detector based on Genetic Algorithms (GA) that can approach the performances of an optimal detector based on the maximum likekihood dtector (MLD). This detector is a hybridization between the GA and a linear detector such as ZF or MMSE detector. The optimization of the parameters of the GA can significantly improve performances. Our detector was compared with other...
The fifth edition of the International Workshop on Codes, Cryptography and Communication Systems (WCCCS'14) is the result of fruitful cooperation between many universities and institutes. WCCCS'14 was held at Faculty of Sciences - El Jadida, Morocco. The workshop is co- organized by Faculty of sciences El Jadida (Chouaib Doukkali University) and ENSIAS (Mohammed V University of Rabat), Morocco, in...
According to the various mobility, the resource allocation, interference, and the characteristics of heterogeneity and ubiquity of access network based on the next generation network, namely, the network IMS (IP Multimedia subsystem), have imposed several challenges. In regard to mobility management, handover management, and Quality of Service (QoS) provisioning, this paper proposes an adaptive environment...
Quadrature phase shift keying (QPSK) is one of modulation schemes used in advanced wireless communication systems. It is known to be robust against the channel impairement. However, when it is used with sophisticated signal processing, it makes Monte Carlo simulation method time consumming. In this paper, we propose a semi-analytical prediction method which provides a significant gain in term of computing...
In this work, we introduce a novel probability density function (PDF)-based expression to obtain the maximum average spectral efficiency (MASE) and the average symbol error rate (ASER) of L-branch Generalized Selection Combining (GSC) receiver over independent and identical Weibull fading channels. Approximating the output SNR by a simple H-distribution, useful expressions of outage probability, MASE...
This paper deals with the bit error rate (BER) semi-analytical prediction in a turbo coded digital communication system. We propose a new prediction method which is based on the kernel estimator of the probability density function (pdf). We assume that no knowledge on the distribution of the received soft samples is available. In the proposed method, we derived a new expression of the smoothing parameter...
The core of Next Generation Network(NGN) IP Multimedia subsystem(IMS) based on SIP as mechanism signaling, is an important challenge for supporting data communication services, voice, video, messaging and web-based technologies. In this work we present a novel design of architecture and turns up some challenges of new IMS architecture and security system. This architecture provides a robustness, reliability,...
The degree of accuracy and availability of service make a distinction between the two main methods of geo-location that are GPS and UMTS. GPS provides good performances in terms of location in open area, but performances degrade to a significant manner when we go into an enclosed area. While the UMTS offers good results in urban areas, we can note a complementarity between these two techniques. In...
In this paper, we present a new hard-decision decoding technique based on Genetic Algorithms, which is applicable to the more general case where the only known structure is given by the parity-check matrix H. The proposed algorithm uses the dual code in contrast to the existing genetic decoders in the literature that use the code itself. Hence, this new approach reduces the complexity of decoding...
Finding the minimum distance of linear codes is in general a NP-hard problem, we propose an efficient algorithm to attack this problem. The principle of this approach is to search code words locally around the all-zero code word perturbed by a level of noise magnitude, in other words the maximum of noise that can be corrected by a Soft-In decoder, anticipating that the resultant nearest non-zero code...
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