Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 1125 for “"two-way"”.
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Spectrum sharing for two-way relay networks
We consider a communication network consisting of two transceiver nodes, one relay node, and one receiving node. The relay enables a two-way communication between the two transceivers and meanwhile sends its own information to the receiving node. We study the problem of the power allocation to the …
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Power-optimal MIMO two-way relay networks
In this dissertation, we study MIMO two-way relay networks consisting of singleantenna users which wish to exchange information with the help of multiple multiantenna relays. The problem we aim to solve is to minimize the total transmit power consumed in the entire network while certain …
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Exploiting channel symmetry in two-way channels
… relaxed constraints. In this work we develop a two-way training channel estimation and precoding scheme that shifts all the computation involved in dealing with multiplicative channel gain as well as frequency selective channels to the base station. This work demonstrates the first tractable …
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Two way power flow using GTO thyristors
Two-way power flow is nothing new and has been in practical use using line commutated converters for at least 50 years. With these types of converters, reversal of power flow can be achieved by increasing the firing angle of the devices beyond 90 degrees thus producing a negative DC voltage. Line …
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Coding for discrete memoryless two-way channels
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1962.
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Sum-rate maximization for two-way active channels.
… allocation and channel design over a reciprocal two-way active channel. Assuming the channel is reciprocal, we consider the sum-rate maximization problem under the assumption that the powers of transceivers as well as the channel power are limited. The goal is to jointly optimize the power of …
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Channel estimation in a two-way relay network
… symbol detection. This thesis considers a network which consists of two transceivers communicating with the help of a relay applying the amplify-and-forward (AF) relaying scheme. The training based channel estimation technique is applied to the proposed network where the numbers of the …
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Power allocation in energy harvesting two-way relay systems
In this thesis, we consider two-way relaying in a wireless communication system with two transceivers and one relay node. In such a model, two scenarios are taken into account: a system with one energy harvesting (EH) relay node and a system with two EH transceivers and one EH relay node. Under …
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Approaching Arctic-midlatitude dynamics from a two-way feedback perspective
… to the Arctic. Studying these relationships in a two-way feedback perspective can offer new insights into these connections, providing information on how they feed back upon each other. This work approaches Arctic-midlatitude dynamics from a two-way feedback perspective, mostly on sub-monthly …
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Optomal three-time slot distributed beamforming for two-way relaying
In this study, we consider a relay network, with two transceivers and r relay nodes. We assume that each of relays and the two transceivers have a single antenna. For establishing the connection between these two transceivers, we propose a two-way relaying scheme which takes three phases (time …
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Two–Way Relaying Communications with OFDM and BICM/BICM-ID
… techniques in relay-aided communication system, two-way relaying communication (TWRC) achieves the highest spectral efficiency due to its bi-directional transmission capability. Nevertheless, different from the conventional point-to-point communication system, TWRC suffers from detection quality …
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Input Processing and the Teaching of German Two-way Prepositions
… to or inhibits the learning of German two-way prepositions. Sixty-four participants from ten intact second-semester German classes in three separate semesters at a large, public, mid-western University were assigned to two treatment groups: one where redundant lexical cues were not …
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The intersection of religion and politics : a two-way street
… the case. All told, my research presents a new way of thinking about the contemporary political and religious landscapes.
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Software-based implementation of a frequency hopping two-way radio
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Tumor cell-immune cell interaction: A lethal two way street
… Fas+, LSA tumor cells using the FasL-based pathway. However, LSA and EL-4 tumor cells constitutively expressed Fas ligand and killed Fas+ PE-9 CTLs and Fas+, but not Fas-negative (Fas-) activated T cells and thymocytes. These data suggested that T cells and cancer cells can kill each other and …
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Estimation of individual variations in an unreplicated two-way classification
… error variance were derived in a nonreplicated two-way classification by the use of the model x<sub>ij</sub> = μ<sub>i</sub> + β<sub>ij</sub> + ε<sub>ij</sub>, i=1,2,...n; j=1,2,...,r, where x<sub>ij</sub> = observation on the i<sup>th</sup> treatment of the j<sup>th</sup> block, μ<sub>i</sub> = …
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