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In this paper, a new modified S-shaped antenna for RFID -UHF tag application is presented. To provide a good conjugate matching between the S-shaped tag antenna and the ship, the technique of adding asymmetrical triangular stubs on both side of the tag chip was applied. The proposed tag antenna operating in the 915MHz RFID band proposed here has dimensions of only 51×43 mm2 and the operating bandwidth...
In this paper, we deal with decoding of convolutional codes using artificial intelligence techniques. A comparison of our decoder versus the Viterbi decoder in terms of performance and computing complexity is given. The simulation results show that the genetic algorithms based decoder (GAD) outperforms the Viterbi decoders. Furthermore the computing complexity of GAD is better for codes with large...
A Wireless Sensor Network (WSN) is one that is in continual interaction with its environment, and executes at a pace determined by that environment. The use of rigorous formal method in specification and validation can help designers to limit the introduction of potentially faulty components during the construction of the system. Due to their complex nature, WSN are extremely difficult to specify...
This paper introduces a new decoder based on genetic algorithms and neural networks for binary linear codes. The search space, in contrast to our previous algorithms which was limited to the codeword space, now covers the whole binary vector space.The neural network is used to favor feasible solution namely codewords. Previous genetic algorithm based decoders [2] require a lot of computing resources...
In this paper, an iterative decoding algorithm of product block codes based on the genetic algorithms is presented. We applied this algorithm over a Rician fading multipath channel in CODIT system, to symmetric and asymmetric PBC constructed from BCH and Quadratic Residue codes of rate .The results show that the proposed algorithm performances outperforms those of the concatenated Reed-Solomon/Convolutional...
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