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Record Nr. |
UNINA9910437889803321 |
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Autore |
Hunger Raphael |
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Titolo |
Analysis and transceiver design for the MIMO broadcast channel / / Raphael Hunger |
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Pubbl/distr/stampa |
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Heidelberg, : Springer, 2012 |
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ISBN |
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1-283-63148-2 |
9786613943934 |
3-642-31692-1 |
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Edizione |
[1st ed. 2013.] |
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Descrizione fisica |
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1 online resource (322 p.) |
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Collana |
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Foundations in signal processing, communications and networking, , 1863-8538 ; ; v. 8 |
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Disciplina |
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Soggetti |
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Radio - Transmitter-receivers - Design and construction |
MIMO systems |
Wireless communication systems |
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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 and index. |
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Nota di contenuto |
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System Models -- Dualities for the MIMO BC and the MIMO MAC with Linear Transceivers -- Rate Duality with Nonlinear Interference Cancelation -- Matrix-Based Gradient-Projection Algorithm -- MIMO BC Transceiver Design with Interference Cancelation -- Asymptotic High Power Analysis of the MIMO BC -- Description of the Quality of Service Feasibility Region. |
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Sommario/riassunto |
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This book deals with the optimization-based joint design of the transmit and receive filters in MIMO broadcast channel in which the user terminals may be equipped with several antenna elements. Furthermore, the maximum performance of the system in the high power regime as well as the set of all feasible quality-of-service requirements is analyzed. First, a fundamental duality is derived that holds between the MIMO broadcast channel and virtual MIMO multiple access channel. This duality construct allows for the efficient solution of problems originally posed in the broadcast channel in the dual domain where a possibly hidden convexity can often be revealed. On the basis of the established duality result, the gradient-projection algorithm is introduced as a tool to solve constrained optimization |
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problems to global optimality under certain conditions. The gradient-projection tool is then applied to solving the weighted sum rate maximization problem which is a central optimization that arises in any network utility maximization. In the high power regime, a simple characterization of the obtained performance becomes possible due to the fact that the weighted sum rate utility converges to an affine asymptote in the logarithmic power domain. We find closed form expressions for these asymptotes which allows for a quantification of the asymptotic rate loss that linear transceivers have to face with respect to dirty paper coding. In the last part, we answer the fundamental question of feasibility in quality-of-service based optimizations with inelastic traffic that features strict delay constraints. Under the assumption of linear transceivers, not every set of quality-of-service requirements might be feasible making the power minimization problem with given lower bound constraints on the rate for example infeasible in these cases. We derive a complete description of the quality-of-service feasibility region for arbitrary channel matrices. |
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2. |
Record Nr. |
UNINA9910151612003321 |
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Autore |
Mustakeem Sowande' M. <1978-> |
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Titolo |
Slavery at Sea : Terror, Sex, and Sickness in the Middle Passage / / Sowande' M. Mustakeem |
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Pubbl/distr/stampa |
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Urbana : , : University of Illinois Press, , 2016 |
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ISBN |
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9780252098994 |
0252098994 |
9780252082023 |
0252082028 |
9780252040559 |
0252040554 |
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Edizione |
[First edition.] |
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Descrizione fisica |
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Collana |
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The new Black studies series |
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Disciplina |
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Soggetti |
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Enslaved women - Atlantic Ocean Region |
Enslaved persons - Health and hygiene - Atlantic Ocean |
Enslaved persons - Violence against - Atlantic Ocean |
Slave trade - Atlantic Ocean Region |
Slave ships - Atlantic Ocean |
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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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Previously issued in print: 2016. |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Introduction: middle passage studies and the birth of slavery at sea – Waves of calamity – Imagined bodies – Healthy desires, toxic realities – Blood memories -- Battered bodies, enfeebled minds – The anatomy of suffering – A tide of bodies – Epilogue: The Frankenstein of slavery: a mediation on memory. |
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Sommario/riassunto |
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Most times left solely within the confine of plantation narratives, slavery was far from a land-based phenomenon. This book reveals for the first time how it took critical shape at sea. Expanding the gaze even more widely, the book centers on how the oceanic transport of human cargoes - known as the infamous Middle Passage - comprised a violently regulated process foundational to the institution of bondage. Sowande' Mustakeem's groundbreaking study goes inside the Atlantic slave trade to explore the social conditions and human costs embedded in the world of maritime slavery. |
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