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 11 of 11 for “"distributed beamforming"”.
-
Distributed beamforming in wireless sensor networks
… language to study the effectiveness of beamforming using sensor clusters for establishing a communication link to the UAV. Results showed that the antenna main lobe remained relatively unchanged in the presence of position errors and sensor node failures or when the density of the sensor …
-
Optomal three-time slot distributed beamforming for two-way relaying
… multiplies its received signal by a complex beamforming coefficient to adjust the phase and amplitude of the signal. Then in the third phase, each relay transmits the summation of so-obtained signals to both transceivers. Our goal is to find the optimal values of transceivers’ transmit powers …
-
Jointly optimal pre- and post-channel equalization and distributed beamforming in asynchronous bi-directional relay networks
… obtaining the transceivers’ powers and relay beamforming weight vectors as well as pre- and post-channel equalizers at the two transceivers. We prove that our proposed approach results in a certain relay selection scheme.
-
Dynamic Cooperative Communications in Wireless Ad-Hoc Networks
… in the cooperation without prior planning via distributed beamforming. The proposed cooperative retransmission scheme outperforms traditional retransmission by the source as well as other cooperative methods in terms of delay and packet error rate (PER). Secondly, the outage probabilities of …
-
Exploring data compression for a distributed aerial relay application
Beamforming systems typically involve arrays of antenna elements with controllable spacing and little or no motion. However, a distributed beamforming system could leave array geometry and motion largely unconstrained. This work considers an airborne relay communication concept with multiple …
-
Argos: Practical Base Stations for Large-scale Beamforming
… many users simultaneously through multi-user beamforming (MUBF). However, realizing such a large-scale design is nontrivial, and has yet to be achieved in the real world. We present the design, realization, and evaluation of Argos, the first reported large-scale base station that is capable of …
-
Multiantenna Communications in the Presence of Feedback
… schemes (most notably, the design of transmit beamforming) in the presence of a reverse feedback link that conveys partial CSI from the receiver to the transmitter. This work presents a comprehensive study of optimal transmission schemes in the general class of linear space-time codes when …
-
Power efficient designs for 5G wireless networks
… We jointly design the power allocation and distributed beamforming coefficients to minimize the total transmission power subject to sum-rate constraints. We propose an optimal semi-closed form solution to this problem and we show that at the optimum, the end-to-end channel has only one …
-
Interference management in cooperative multi-cell networks
… interference management techniques based on beamforming<br/>with different levels of cooperation amongst base stations (BSs).<br/>First, a multi-cell beamforming (MBF) technique is introduced to design<br/>beamformers as if geographically distributed BSs were a single BS. The<br/>aim is to …
-
Power-aware routing in multi-hop wireless networks
… point to point non-cooperative transmissions, distributed beamforming and centralized beamforming. Then, several power saving routing algorithms are proposed, each tailored for a specific type of transmission strategy. The proposed algorithms aim to minimize the end to end path power …
-
Efficient tranceiver [sic] techniques for interference and fading mitigation in wireless communication systems
… one virtual antenna array and applying a spatial beamforming technique so as to optimize the communication via them. Such beamforming techniques differ from their classical counterparts where the array elements are located in a common processing unit, due to the distribution of the relays in the …