The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Lin Xiao - One of the best experts on this subject based on the ideXlab platform.
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Energy Efficiency and Optimal Resource Allocation in Cooperative Wireless Relay Networks
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011Co-Authors: Laurie Cuthbert, Tiankui Zhang, Lin XiaoAbstract:This paper considers using wideband slope as the measure to compare the energy efficiency between different transmission schemes for wideband cooperative wireless relay networks. Two different scenarios are considered (relay with Unlimited Power supply and relay with limited Power supply) and two different relay strategies (amplify and forward, decode and forward) with direct transmission being used as a benchmark. The condition for getting optimal energy efficiency is obtained using theoretical analysis and simulation. The results show that (i) the source-relay distance is the most important factor influencing the energy efficiency of the whole system and (ii) the conditions for optimum energy efficiency depend on the type of relay mode.
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VTC Spring - Energy Efficiency and Optimal Resource Allocation in Cooperative Wireless Relay Networks
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011Co-Authors: Laurie Cuthbert, Tiankui Zhang, Lin XiaoAbstract:This paper considers using wideband slope as the measure to compare the energy efficiency between different transmission schemes for wideband cooperative wireless relay networks. Two different scenarios are considered (relay with Unlimited Power supply and relay with limited Power supply) and two different relay strategies (amplify and forward, decode and forward) with direct transmission being used as a benchmark. The condition for getting optimal energy efficiency is obtained using theoretical analysis and simulation. The results show that (i) the source-relay distance is the most important factor influencing the energy efficiency of the whole system and (ii) the conditions for optimum energy efficiency depend on the type of relay mode.
Jeffrey Krichmar - One of the best experts on this subject based on the ideXlab platform.
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A complete neuromorphic solution to outdoor navigation and path planning
2017 IEEE International Symposium on Circuits and Systems (ISCAS), 2017Co-Authors: Jeffrey KrichmarAbstract:Recent developments in neuromorphic engineering have enabled low-Powered processing and sensing in robotics, leading to more efficient brain-like computation for many robotic tasks such as motion planning and navigation. However, present experiments in neuromorphic robotic systems have mostly been performed under controlled indoor settings, often with Unlimited Power supply. While this may be suitable for many applications, these algorithms often fail in outdoor dynamic environments that could benefit the most from the low size, weight, and Power of neuromorphic devices. We present the current challenges of outdoor robotics, how current neuromorphic solutions can address these problems, our current approaches to the task, and what further needs to be achieved to create a complete neuromorphic solution to outdoor navigation and path planning.
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ISCAS - A complete neuromorphic solution to outdoor navigation and path planning
2017 IEEE International Symposium on Circuits and Systems (ISCAS), 2017Co-Authors: Jeffrey KrichmarAbstract:Recent developments in neuromorphic engineering have enabled low-Powered processing and sensing in robotics, leading to more efficient brain-like computation for many robotic tasks such as motion planning and navigation. However, present experiments in neuromorphic robotic systems have mostly been performed under controlled indoor settings, often with Unlimited Power supply. While this may be suitable for many applications, these algorithms often fail in outdoor dynamic environments that could benefit the most from the low size, weight, and Power of neuromorphic devices. We present the current challenges of outdoor robotics, how current neuromorphic solutions can address these problems, our current approaches to the task, and what further needs to be achieved to create a complete neuromorphic solution to outdoor navigation and path planning.
G.b. Giannakis - One of the best experts on this subject based on the ideXlab platform.
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On energy efficiency and optimum resource allocation of relay transmissions in the low-Power regime
IEEE Transactions on Wireless Communications, 2005Co-Authors: G.b. GiannakisAbstract:Relay links are expected to play a critical role in the design of wireless networks. This paper investigates the energy efficiency of relay communications in the low-Power regime under two different scenarios: when the relay has Unlimited Power supply and when it has limited Power supply. A system with a source node, a destination node, and a single relay operating in the time division duplex (TDD) mode was considered. Analysis and simulations are used to compare the energy required for transmitting one information bit in three different relay schemes: amplify and forward (AnF), decode and forward (DnF), and block Markov coding (BMC). Relative merits of these relay schemes in comparison with direct transmissions (direct Tx) are discussed. The optimal allocation of Power and transmission time between source and relay is also studied.
Laurie Cuthbert - One of the best experts on this subject based on the ideXlab platform.
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Energy Efficiency and Optimal Resource Allocation in Cooperative Wireless Relay Networks
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011Co-Authors: Laurie Cuthbert, Tiankui Zhang, Lin XiaoAbstract:This paper considers using wideband slope as the measure to compare the energy efficiency between different transmission schemes for wideband cooperative wireless relay networks. Two different scenarios are considered (relay with Unlimited Power supply and relay with limited Power supply) and two different relay strategies (amplify and forward, decode and forward) with direct transmission being used as a benchmark. The condition for getting optimal energy efficiency is obtained using theoretical analysis and simulation. The results show that (i) the source-relay distance is the most important factor influencing the energy efficiency of the whole system and (ii) the conditions for optimum energy efficiency depend on the type of relay mode.
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VTC Spring - Energy Efficiency and Optimal Resource Allocation in Cooperative Wireless Relay Networks
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011Co-Authors: Laurie Cuthbert, Tiankui Zhang, Lin XiaoAbstract:This paper considers using wideband slope as the measure to compare the energy efficiency between different transmission schemes for wideband cooperative wireless relay networks. Two different scenarios are considered (relay with Unlimited Power supply and relay with limited Power supply) and two different relay strategies (amplify and forward, decode and forward) with direct transmission being used as a benchmark. The condition for getting optimal energy efficiency is obtained using theoretical analysis and simulation. The results show that (i) the source-relay distance is the most important factor influencing the energy efficiency of the whole system and (ii) the conditions for optimum energy efficiency depend on the type of relay mode.
R D White - One of the best experts on this subject based on the ideXlab platform.
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AC/DC Railway Electrification and Protection
IET 13th Professional Development Course on Electric Traction Systems, 2014Co-Authors: R D WhiteAbstract:The technical strength of all electrification schemes lies in the fact that the prime mover is removed from the train; but this is also its economic weakness. By taking Power from a distribution network there is almost Unlimited Power available which has been efficiently produced but the cost of providing the fixed installations can only be justified where the traffic is heavy or frequency is high. The 25 kV A.C. 50 Hz electrification system has been developed specifically for railway traction purposes. The main feature that separates this system from the conventional 3 phase and neutral HV distribution network of the public supply authority is that the railway system is a single-phase system with one pole earthed. Even though other railway administration have their own individual electrification schemes the basic design of the systems is the same.
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AC 25kV 50 Hz electrification supply design
6th IET Professional Development Course on Railway Electrification Infrastructure and Systems (REIS 2013), 2013Co-Authors: R D WhiteAbstract:The technical strength of all electrification schemes lies in the fact that the prime mover is removed from the train; but this is also its economic weakness. By taking Power from a distribution network there is almost Unlimited Power available which has been efficiently produced. The cost of providing the fixed installations can only be justified where the traction loads are heavy or there is a high density of traffic.
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AC/DC railway electrification and protection
IET Professional Development Course on Electric Traction Systems, 2010Co-Authors: R D WhiteAbstract:The technical strength of all electrification schemes lies in the fact that the prime mover is removed from the train; but this is also its economic weakness. By taking Power from a distribution network there is almost Unlimited Power available which has been efficiently produced but the cost of providing the fixed installations can only be justified where the traffic is heavy or frequency is high.
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AC/DC railway electrification and protection
The 9th Institution of Engineering and Technology Professional Development Course on Electric Traction Systems, 2006Co-Authors: R D WhiteAbstract:The technical strength of all electrification schemes lies in the fact that the prime mover is removed from the train; but this is also its economic weakness. By taking Power from a distribution network there is almost Unlimited Power available which has been efficiently produced but the cost of providing the fixed installations can only be justified where the traffic is heavy or frequency is high. The 25 kV rail network has been designed to meet the needs of a fast, intercity, multi-track railway network carrying a variety of trains at frequent intervals. This operation requires an overhead system that is inherently safe for employees and passengers, reliable and provides a high degree of security of the supply to the traction units. This will ensure that the electrification supply system is able to provide the required Power levels to fulfil the performance of the traction units
