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.
Results
Showing 1 to 20 of 216 for “"Multi-user"”.
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Asymptotic analysis for multi-user channels
This dissertation studies the asymptotics of two multi-user channel problems. The fingerprinting channel is associated with digital fingerprinting, which is an emerging technology to protect multimedia from unauthorized redistribution. The encoder embeds fingerprints into a host sequence and …
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A Structural Approach to Multi-User Detection
Multi-user detection focuses on the problem of demodulating the information symbols of multiple users sharing a common communication medium, e.g., a wireless communication system. An extensive literature currently exists on the various aspects of multi-user detection, including linear detection, …
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A simulation environment for multi-user telerobotics
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
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MUD, a networked, multi-user database service
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1990.
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Head Tracked Multi User Autostereoscopic 3D Display Investigations
… the positions of these are controlled by a multi-user head tracker. A laser projector was used in the first two versions and, although this projector operated on holographic principles in order to obtain the spot pattern required to produce the exit pupils, it should be noted that images …
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Transmitter precoding for multi-antenna multi-user communications
… motivate the design of low-power receivers. Multi-user interference drastically reduces the energy efficiency of wireless multi-user communications by introducing errors in the bits being detected at the receiver. Interference rejection algorithms and multiple antenna techniques can …
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Spectrum sharing for multi-user massive MIMO networks
… (USS) scheme on the performance of two massive multi-input-multi-output (MIMO) networks. We explore an USS approach where a multi-user massive MIMO network (primary network (PN)), i.e., the owner of the frequency spectrum, allows another multi-user massive MIMO network, the secondary network …
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Performance of multi-user codes in wireless communications
Multi-user codes are a widely used in transmitting user data from base station to mobile station and vice versa. In wireless communications a signal received by a mobile station goes through different fading channels resulting. These multi-paths add constructively and destructively with different …
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Practical security for multi-user web application databases
… are continuously vulnerable to attacks on their users' data. Outside adversaries can gain unauthorized access by exploiting unknown vulnerabilities; curious or malicious database administrators can examine or alter the data in situ. Multiple Principal CryptDB protects against attacks on web …
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Multi-user detection for multi-rate DS/CDMA systems
… services motivate the need for handling multi-media traffic types. In a multimedia communication system, users with different and even time-varying rates and quality of services (QoS) requirements, such as voice, image and data, must be accommodated. The use of Spread Spectrum modulation …
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Channel estimation for Gigabit Multi-user MIMO-OFDM Systems
… diversity techniques, for example, when multiple-input multiple-output (MIMO) antenna technologies are employed in conjunction with Orthogonal Frequency Division Multiplexing (OFDM).However, the superior performance promised by the MIMO-OFDM technology relies on the availability of …
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Aesthetically driven design of network based multi-user instruments.
… in ways not possible before. Network based Multi-User Instruments (NMIs) are one novel method of musical collaboration that take advantage of networking technology. NMIs are digital musical instruments that exist as a single entity instantiated over several nodes in a network and are …
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Using Bluetooth to enable multi-user communications in TaleBlazer
… Although TaleBlazer has attempted to make its multiplayer mode work, it has not succeeded despite several years of production. Instead of attempting to make headway in multiplayer mode again, this thesis focuses on building a new feature in TaleBlazer to allow players to interact with each …
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MULTI USER COOPERATION SPECTRUM SENSING IN WIRELESS COGNITIVE RADIO NETWORKS
… is extended to cooperative sensing; in which multiple cognitive users collaborate to detect the primary transmission. The new combined approach (AOED and CSS) is shown to be more reliable detection than the individual detection scheme, where the hidden terminal problem can be mitigated. …
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Reducing Multiple Access Interference in Broadband Multi-User Wireless Networks
<p>This dissertation is devoted to developing multiple access interference (MAI) reduction techniques for multi-carrier multi-user wireless communication networks.</p> <p>In multi-carrier code division multiple access (MC-CDMA) systems, a full multipath diversity can be achieved by transmitting one …
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The capacity of a non-coherent channel : multi user setting
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
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Decentralized multi-user multi-armed bandits with user dependent reward distributions
… spectrum access problem is studied using a multi-player multi-armed bandits framework. We consider a decentralized multi-player stochastic multi-armed bandit model where the players cannot communicate with each other and can observe only their own actions and rewards. Furthermore, the …
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Spatially Coupled Sparse Regression Codes for Single- and Multi-user Communications
… for efficient communication over the single-user additive white Gaussian noise (AWGN) channel at rates approaching the channel capacity. In a standard SPARC, codewords are sparse linear combinations of columns of an i.i.d. Gaussian design matrix, and the user message is encoded in the indices …
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