By Eleazar Jimenez Serrano (auth.), Sio-Iong Ao, Len Gelman (eds.)
The revised and prolonged papers amassed during this quantity symbolize the state of the art of study on the nexus of electric engineering and clever structures. They have been chosen from good over a thousand papers submitted to the high-profile foreign global Congress on Engineering held in London in July 2011. The chapters hide fabric around the complete spectrum of labor within the box, together with computational intelligence, regulate engineering, community administration, and instant networks. Readers also will locate important papers on sign processing, net computing, excessive functionality computing, and business applications.
The electric Engineering and clever structures convention, as a part of the 2011 global Congress on Engineering was once prepared lower than the auspices of the non-profit overseas organization of Engineers (IAENG). With greater than 30 international locations represented at the convention committees by myself, the Congress positive aspects the simplest and brightest medical minds from a large number of disciplines concerning engineering. those peer-reviewed papers reveal the massive strides presently being taken during this speedily constructing box and replicate the thrill of these on the frontiers of this research.
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We modify the DLX [9] and PicoJava II [10] Instruction Set Architecture (ISA) by adding new custom permutation instruction WUHPERM [11] in their instruction set. The performance of the new instruction is analyzed for execution time. 8 [12] and Mic-1 simulator [10], respectively. Similarly, by using the same approach of designing custom instructions, the ISA of DLX processor is enhanced by adding Texpand instruction, used in Viterbi decoding algorithm. 8 simulator. The chapter is organized as follows: Section 2 presents the modified AES algorithm, which is an enhanced version of the original AES algorithm and utilizes the permutation operation more intensively as compared to other algorithms.
We discuss the related work in Section 8, and finally, the conclusions are presented in Section 9. 4 Efficient Implementation of Computationally Complex Algorithms. . 41 2 Modified AES Algorithm The modified AES algorithm is an improvement in the original AES cryptographic method presented in [13]. AES is the first algorithm proposed by National Institute of Standards and Technology (NIST) in October 2000 and is published as FIPS 197 [1]. Currently, it is known as one of the most secure and popular symmetric key algorithms [14].
1. We use this model to implement the proposed custom instruction used in Viterbi algorithm. The Viterbi decoder utilizes the trellis structures to perform the decoding operation. The number of times the trellis expansion function is called, depends on the amount of decoding bits and the states in the trellis. The state diagram and the block diagram of a convolutional encoder are shown in Fig. 1a, b, respectively. This encoder has four states and there are two possible transitions from a state to two other states.