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Record Nr. |
UNINA9910451184703321 |
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Autore |
Yuen Chau |
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Titolo |
Quasi-orthogonal space-time block code [[electronic resource] /] / Chau Yuen, Yong Liang Guan, Tjeng Thiang Tjhung |
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Pubbl/distr/stampa |
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London ; ; Imperial College Press ; ; Hackensack, NJ, : Distributed by World Scientific, c2007 |
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ISBN |
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1-281-86764-0 |
9786611867645 |
1-86094-869-3 |
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Descrizione fisica |
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1 online resource (208 p.) |
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Collana |
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Communications and signal processing ; ; v. 2 |
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Altri autori (Persone) |
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GuanYong Liang |
TjhungTjeng Thiang |
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Disciplina |
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Soggetti |
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Space time codes |
MIMO systems |
Electronic books. |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references (p. 184-190) and index. |
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Nota di contenuto |
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Contents; Foreword; 1 . Introduction of MIMO Channel and Space-Time Block Code; 1.1 MIMO Channel for Wireless Communications; 1.2 Transmit Diversity with Space-Time Block Code; 1.3 Notations and Abbreviations; 1.4 Signal Model of MIMO Channel and STBC; 1.4.1 Signal model of MIMO channel; 1.4.2 Signal model of STBC; 1.5 Design Criteria and Performance Measure of STBC; 2 . Orthogonal and Quasi-Orthogonal Space-Time Block Code; 2.1 Orthogonal Space-Time Block Code; 2.1.1 Benefits of 0-STBC; 2.1.2 Background of amicable orthogonal design; 2.1.3 Construction of 0-STBC and its rate limitation |
2.2 Quasi-Orthogonal Space-Time Block Code2.2.1 Approaching capacity with low decoding complexity; 2.2.2 Performance optimization of QO-STBC; 2.2.2.1 Full-diversity QO-STBC with constellation rotation; 2.2.2.2 Full-diversity QO-STBC without constellation rotation; 2.2.3 Remark; 3 . Insights of QO-STBC; 3.1 Algebraic Structure of QO-STBC; 3.1.1 Decoding complexity of a QO-STBC; 3.1.2 Maximal symbol-wise diversity of a QO-STBC; 3.2 Generalized Decoding Framework of QO-STBC; 3.3 Impact of Constellation Rotation on the Decoding Complexity |
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of QO-STBC |
3.3.1 Simplified QO-STBC model with real symbols only3.3.2 Decoding complexity of QO-STBC with CR; 3.4 Group-Constrained Linear Transformation; 3.4.1 Definition of GCLT; 3.4.2 Optimization of GCLT parameters; 3.4.2.1 GCLT of J4; 3.4.2.2 GCLT of J8; 3.4.2.3 GCLTof TBH8; 3.4.3 Performance comparison; 3.4.3.1 ML decoding complexity; 3.4.3.2 Decoding performance; 3.5 Chapter Summary; 4 . Quasi-Orthogonal Space-Time Block Code with Minimum Decoding Complexity; 4.1 Algebraic Structure of MDC-QOSTBC; 4.2 Square MDC-QOSTBC Design; 4.2.1 Definition of preferred AOD pair |
4.2.2 Relationship between MDC-QOSTBC and AOD through preferred AOD pair4.2.3 Lower bound on the code rate for square design; 4.2.4 Construction of preferred AOD pair; 4.2.4.1 Quaternion; 4.2.4.2 Systematic construction of preferred AOD pair; 4.2.4.3 Examples of MDC-QOSTBC constructed)om preferred AOD pair; 4.3 Construction of MDC-QOSTBC from 0-STBC; 4.3.1 Construction method; 4.3.2 Performance optimization; 4.3.2.1 Diversity product of MDC-QOSTBC; 4.3.2.2 Optimum CR angle for square- and rectangular-QAM; 4.3.2.3 Optimum CR angle for PSK; 4.3.3 Non-square MDC-QOSTBC design |
4.3.3.1 MDC-QOSTBC for odd number of transmit antennas4.3.3.2 Maximum code rate of square MDC-QOSTBC; 4.3.3.3 Maximum code rate of non-square MDC-QOSTBC; 4.4 Performance Results; 4.5 Chapter Summary; 5 . Differential QO-STBC; 5.1 DSTM Codeword Model and Design Criteria; 5.2 Unitary DSTM Based on QO-STBC; 5.2.1 Literature review; 5.2.2 Signal model of unitary DSTM scheme; 5.2.3 Double-symbol-decodable unitary DSTM; 5.2.3.1 STBC Unitary DSTM Based on Double-Symbol-Decodable QO-; 5.2.3.2 Design of constellation set; 5.2.4 Performance comparison; 5.2.5 Section summary |
5.3 Quasi-Unitary DSTM Based on MDC-QOSTBC |
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Sommario/riassunto |
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<i>Quasi-Orthogonal Space-Time Block Code</i> presents an up-to-date, comprehensive and in-depth discussion of an important emerging class of space-time codes, called the Quasi-Orthogonal STBC (QO-STBC). Used in Multiple-Input Multiple-Output (MIMO) communication systems, they provide transmit diversity with higher code rates than the well-known orthogonal STBC (O-STBC), yet at lower decoding complexity than non-orthogonal STBC. This book will help readers gain a broad understanding of the fundamental principles as well as the state-of-the-art work in QO-STBC, thus enabling them to appreciate |
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2. |
Record Nr. |
UNINA9910416518903321 |
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Autore |
Bisconti Valentina |
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Titolo |
Le sens en partage : Dictionnaires et théories du sens. XIXe–XXe siècles / / Valentina Bisconti |
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Pubbl/distr/stampa |
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Lyon, : ENS Éditions, 2018 |
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ISBN |
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2-84788-854-3 |
2-84788-853-5 |
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Altri autori (Persone) |
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Soggetti |
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Language & Linguistics Theory |
sémantique |
dictionnaire |
lexicographie |
sens |
histoire des théories linguistiques |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Sommario/riassunto |
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Peut-on identifier la signification comme objet spécifique d’un seul domaine d’études ? Bien avant l’institution de la sémantique au XIXe siècle, la signification est analysée empiriquement par les lexicographes. S’agit-il d’une filiation ? La sémantique linguistique naît-elle de la lexicographie monolingue ? Une dialectique, sans cesse réactivée dans le temps et à travers les différentes écoles, s’instaure entre sémanticiens et lexicographes en raison du partage conflictuel de cet objet commun qu’est le sens, ainsi que de toute une série de questions annexes : le statut du mot, l’articulation entre état de langue et histoire, la tension entre norme et usage, le choix entre polysémie ou homonymie, la place du locuteur dans le changement linguistique, etc. Cette dialectique entre un savoir-faire empirique (lexicographie) et un savoir savant (sémantique) en matière de sens ne saurait s’expliquer par les conditions d’émergence et les incertitudes de méthode de la nouvelle discipline. Une méfiance tenace envers les dictionnaires est présente aussi bien chez les philologues du XIXe siècle que chez les |
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linguistes, lexicologues et sémanticiens du XXe siècle travaillant dans des cadres théoriques aussi différents que le structuralisme, le générativisme et le cognitivisme. L’ouvrage explique ainsi les transferts de méthode réciproques entre sémantique et lexicographie et montre à quel point la tension interdisciplinaire est une dynamique constitutive des savoirs sur le sens. |
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