The Random Linear Network coding (RLNC) has been investigated as a promising solution for improve transmission reliability;however, it is highly susceptible to errors. In wireless sensor networks (WSN), The problem re...
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ISBN:
(纸本)9781538662205
The Random Linear Network coding (RLNC) has been investigated as a promising solution for improve transmission reliability;however, it is highly susceptible to errors. In wireless sensor networks (WSN), The problem resemblance to a column vector on the generator matrix of Low-Density Parity-Check (LDPC) matrix is caused by the important similarity between received symbols from the cluster head (CH). To deal with this problem, we have to reduce BER. The principal objective of this paper is to use an efficient coding approach based on the RNC and LDPC codes using TDMA (Time Division Multiple Access) technology. The coding techniques employed in this paper are focused on enhance planning to report error-bit (BER) vs. signal-to-noise (SNR), between CHs and the base station (BS) node in dense WSN, while describing each point examining effective use of the proposed algorithm.
For a fading Gaussian multiple access channel with user cooperation, we obtain the optimal power allocation policies that maximize the rates achievable by block Markov superposition coding. The optimal policies result...
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ISBN:
(纸本)0780393058
For a fading Gaussian multiple access channel with user cooperation, we obtain the optimal power allocation policies that maximize the rates achievable by block Markov superposition coding. The optimal policies result in a coding scheme that is simpler than the one for a general multiple access channel with generalized feedback. This simpler coding scheme also leads to the possibility of formulating an otherwise non-concave optimization problem as a concave one. Using the channel state information at the transmitters to adapt the powers, we demonstrate significant gains over the achievable rates for existing cooperative systems.
Along with the development of multimedia, animation, and network bandwidth, online gaming has become a very successful and outstanding industry recently, especially in Asia Pacific. However, due to the lack of securit...
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In distributed systems uneven arrival of the tasks may overload few hosts keeping the rest of the hosts lightly loaded or even idle. This results in overall poor system performance in spite of the system capabilities....
Cooperative spectrum sensing taking into account the error effect on the sensing information reporting is studied. Employing the relay, a novel cooperative spectrum sensing algorithm based on network coding is propose...
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ISBN:
(纸本)9781424462520
Cooperative spectrum sensing taking into account the error effect on the sensing information reporting is studied. Employing the relay, a novel cooperative spectrum sensing algorithm based on network coding is proposed by correcting the received sensing information. The efficiency of the algorithm and the method of relay selection are given. The simulation results show that the performance of the novel algorithm is better than cooperative spectrum sensing based on space-time code, and the novel algorithm can meet the situations when destroyed reporting paths exist.
Communications usually do not have enough security. One of the ways for making the data secure is using methods for coding the information in a special manner. In this article one of the algorithms of coding and decod...
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ISBN:
(纸本)9781424455379
Communications usually do not have enough security. One of the ways for making the data secure is using methods for coding the information in a special manner. In this article one of the algorithms of coding and decodinginformation has been reviewed and explained. coding is converting information to the form of coded text and decoding is the operation of converting coded information to the original form This algorithm can implement these two operations well with high confidence. Algorithm of coding data rapidly is called FEAL. All the parts of this algorithm such as the method of the operations of this algorithm, method of producing key, method of producing accidental data and etc. have been reviewed. After the description of the general structure, method of its simulation by using the hardware description language VHDL have been reviewed and the results of its synthesis by another algorithm named DES in the framework of one comparison is being reviewed.
Spread spectrum and channel coding are two main anti-interference methods in wireless communication. In order to enhance the anti-interference ability of communication systems, this paper proposes a joint coding and m...
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In this work the labelling diversity scheme is developed. The Binary Switching Algorithm is employed to find an optimized 2-dimensional labelling map of 16-QAM constellation, which, applied in conjunction with the bes...
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ISBN:
(纸本)9781424495375
In this work the labelling diversity scheme is developed. The Binary Switching Algorithm is employed to find an optimized 2-dimensional labelling map of 16-QAM constellation, which, applied in conjunction with the best map for iteratively-decoded bit-interleaved space-time coded modulation (BI-STCM-ID), enhances the advantages of multi-antenna transmission. Properties of the proposed scheme are compared with the original BI-STCM-ID by means of Distance Spectrum, Extrinsic information Transfer (EXIT) Chart and Asymptotic coding Gain calculation. Afterwards they are verified by the Monte-Carlo simulations.
This paper focuses on the channel codingtechnology in digital communication, especially convolutional code and turbo code. Convolutional codes improve error correction ability by introducing memory, while turbo codes...
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