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 36 for “"relay networks"”.
-
Outage performance of cooperative cognitive relay networks
… considers the incorporation of cooperative relays into a cognitive radio network. Cognitive radio is a potential solution to the growing scarcity of radio spectrum and the increased demand for wireless services. Cooperative relay networks can help cognitive radios to improve their …
-
Spectrum sharing for two-way relay networks
… 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 transceiver signal and the …
-
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 …
-
Congestion control in large frame relay networks
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1988.
-
Cross-layer design for wireless sensor relay networks
In recent years, the idea of wireless sensor networks has gathered a great deal of attention. A distributed wireless sensor network may have hundreds of small sensor nodes. Each individual sensor contains both processing and communication elements and is designed in some degree to monitor the …
-
Performance analysis of cooperative relay networks in presence of interference
… wireless communications systems. Cooperative relaying improves the performance of wireless networks by forming an array of multiple independent virtual sources transmitting the same information as the source node. In addition, when relays are deployed near the edge of the network, they can …
-
Design and analysis of transmission strategies in wireless relay networks
The next generation wireless networks are expected to meet very ambitious data rates and flexible interfaces for different communication system standards. Multiple-input-multiple-output (MIMO) technique has shown to improve the channel capacity dramatically. However, placing multiple antennas …
-
Differential modulation and non-coherent detection in wireless relay networks
… Due to the distributed nature of cooperative networks, acquiring fading channels information for coherent detection is more challenging than in the traditional point-to-point communications. To bypass the requirement of channel information, differential modulation together with non-coherent …
-
On the capacity of relay networks with finite memory relays
(cont.) the length of relay memory and the number of relay stages.
-
A Performance Comparison of Frame Structures in WiMAX Multi-Hop Relay Networks
Wireless multi-hop relay systems are the newest amendment to the IEEE 802.16 standard for local and metropolitan area networks, else known as WiMAX. Relay systems come in different flavours, based on their capabilities and have the potential to offer many advantages over the single-hop technology. …
-
Prioritization, security and relay selection in network coded multiple access relay networks
… the issue of security in multiple access relay network. Security has always been a primary concern in wireless networks due to it broadcast nature of transmission. The intermediate relay nodes in a wireless network could be modified by adversary to transmit corrupted information. We …
-
Integrated dynamic bandwidth allocation and congestion control in satellite frame relay networks
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
-
Jointly optimal pre- and post-channel equalization and distributed beamforming in asynchronous bi-directional relay networks
We consider an asynchronous two-way relay network, consisting of two transceivers and multiple relays, where due to the propagation delays of different transceiver-relay paths being different, inter-symbol- interference (ISI) exists at both transceivers. In this work, pre- and post-channel …
-
A digital interface for wireless networks
… problem of determining the capacity of wireless networks and how to operate them. Within this context we present results on Gaussian relay, interference, and multicast networks. Two new models for wireless networks are introduced here: the discrete network and the superposition network. As with a …
-
Power allocation and linear precoding for wireless communications with finite-alphabet inputs
… of practical communication system/networks through linear precoding and power allocation. First, the mutual information or capacity region is derived for finite-alphabet inputs such as phase-shift keying (PSK), pulse-amplitude modulation (PAM), and quadrature amplitude modulation …
-
Resource allocation for multi-cell OFDMA based cooperative relay network
… idea is that intermediary nodes, called relay stations (RSs), who are neither the data source nor destination, are used to assist in communication between sender and receiver. In order to maximise their performance, networks which employ RSs require a new resource allocation and …
-
Comparing Duplexing, Multiplexing, and Multiple Access Techniques in Ad Hoc Networks
Wireless ad-hoc networks have seen much attention in recent years, and are still a topic of much interest, especially as a result of an increasing need for ubiquitous connectivity. Ad-hoc networks have applications in tactical military systems as well as in commercial systems because of the …
Page 1 of 2