AN IMPROVED INTERPOLATION METHOD FOR CHANNEL ESTIMATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEM USING PILOT SIGNALS

. AN IMPROVED INTERPOLATION METHOD FOR CHANNEL ESTIMATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEM USING PILOT SIGNALS AHMED. performance for channel estimation based different interpolation technique using MMSE for pilot estimation 114 5.9 MSE performance for channel estimation...

Báo cáo khoa học: "An Improved Error Model for Noisy Channel Spelling Correction" ppt

... shown in Table 2. As weexpected, positional information helps morewhen using a richer edit set than when using only single character edits. For a maximumwindow size of 0, using positionalinformation ... iterativelyreestimating parameters, as was done in theoriginal formulation in (Church and Gale1991). Doing so resulted in a slightdegradation in performance. The data weare using is much cleaner than that ... letters in si with those in wi based on minimizing the edit distancebetween si and wi, based on single characterinsertions, deletions and substitutions. For instance, given the training...

Tài liệu Báo cáo khoa học: "A Method for Correcting Errors in Speech Recognition Using the Statistical Features of Character Co-occurrence" pptx

... actual utterance, and with perfect expression. (B) No lacking in meaning, but with slightly awkward expression. (C) Slightly lacking in meaning. (D) Considerably lacking in meaning. (E) Unable ... correct parts in it. In this paper we therefore propose a method for correcting errors, which is characterized by learning the trend of errors and expressions, and by processing in an arbitrary ... together in this order is abbreviated to EPC+SSC. 1 Introduction In spite of the increased performance of speech recognition systems, the output still contains many errors. For language processing...

Báo cáo khoa học: "An Exact A* Method for Deciphering Letter-Substitution Ciphers" doc

... which thereis no dominant encoding standard for the writing system. In these languages, we would like to beable to automatically retrieve and display the in- formation in electronic documents ... hypothesized lan-guage into an unknown writing system or an unknown encoding of a known writing system. It is a problem that can occur in a number of practical applications, such as in the problem ... method for efﬁciently solving decipherment prob-lems.1 IntroductionLetter-substitution ciphers encode a documentfrom a known language into an unknown writ-ing system or an unknown encoding...

Báo cáo khoa học: "A Feedback-Augmented Method for Detecting Errors in the Writing of Learners of English" docx

... beincluded in training data. For simplicity of imple-mentation, they are excluded from training data1.Note that the tagging rules can be used only for generating training data. They cannot be ... that performance of the proposed method willimprove if these instances are included in the training data.the target errors since they are based on the articlesand the distinction between singular ... singular and plural.Finally, the tagged instances are stored in a ﬁlewith their surrounding words. Each line of it con-sists of one of the tagged instances and its sur-rounding words as in the...

Báo cáo khoa học: "Feature-based Method for Document Alignment in Comparable News Corpora" ppt

... frequency correlation for “Filipina”, “Information Technology”, and “联合国”. Using three months - May to July, 2006 – of daily newspaper in Strait Times2 (in English), Zao Bao3 (in Chinese), ... Bank in Chinese)”, and “Bank Dunia (World Bank in Malay)” in the three language corpora are almost similar because of the discriminative power of that phrase. The phrase has no variance and ... as language indepen-dent. 5 English is in Indo-European; Chinese is in Sino-Tibetan; Malay is in Austronesian family [Wikipedia]. The evaluation is conducted based on a set of manually...

Báo cáo khoa học: "A Bayesian Method for Robust Estimation of Distributional Similarities" pot

... proﬁles. In Proceedings of15th Annual Meeting of The Association for NaturalLanguage Processing (in Japanese).Dekang Lin. 1998. Automatic retrieval and clusteringof similar words. In Proceedings ... Hashimoto, and Sadao Kurohashi. 2008.Tsubaki: An open search engine infrastructure for developing new information access. In Proceedingsof IJCNLP 2008.Yee Whye Teh. 2006. A hierarchical Bayesian lan-guage ... Pitman-Yor processes. In Proceedings of COLING-ACL 2006, pages 985–992.Akira Terada, Minoru Yoshida, and Hiroshi Nakagawa.2004. A tool for constructing a synonym dictionary using context information....

Estimation method for contribution of emission to trace metal concentrations in urban atmosphere based o

... refuse incineration (Fig. 1). These results suggest that lead in the urban atmosphere in Japan is mainly discharged by refuse incineration with the isotope ratios being fairly constant except in ... that lead in the atmosphere originates from refuse incineration and other sources, a new estimation method for the contribution of emission sources to trace metal concentrations using the contribution ... (coal-combustion and lead smelting, etc.) and (2) areas affectedby lead transported for a long distance from the Chinese continent (emission of lead through the use of leaded gasoline and thecombustion...

Hydraulic modeling of open channel flows over an arbitrary 3-d surface and its applications in amenity hydraulic engineering

. can be classified as a combination of the above sub-classes as follows: Unsteady 2D model for open channel flows in a curvilinear coordinate system using. flows in the natural rivers or meandering channels, the boundary-fitted curvilinear coordinates were introduced. The use of curvilinear coordinates can overcome...

A Study of Channel Estimation for OFDM Systems and System Capacity for MIMO-OFDM Systems

. frequency- division multiplexing (OFDM) systems and the multiple-input multiple-output orthogonal frequency- division multiplexing (MIMO-OFDM) system capacity. For. Fig 6.9: The variance of OFDM system capacity for Rayleigh fading channel and Ricean fading channel, by computer simulation and numerical method. ............................

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