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S. Talwar - One of the best experts on this subject based on the ideXlab platform.

  • distributed interference aware energy efficient Power Optimization
    IEEE Transactions on Wireless Communications, 2011
    Co-Authors: G. Miao, N. Himayat, Geoffrey Ye Li, S. Talwar
    Abstract:

    Power Optimization techniques are becoming increasingly important in wireless system design since battery technology has not kept up with the demand of mobile devices. They are also critical to interference management in wireless systems because interference usually results from both aggressive spectral reuse and high Power transmission and severely limits system performance. In this paper, we develop an energy-efficient Power Optimization scheme for interference-limited wireless communications. We consider both circuit and transmission Powers and focus on energy efficiency over throughput. We first investigate a non-cooperative game for energy-efficient Power Optimization in frequency-selective channels and reveal the conditions of the existence and uniqueness of the equilibrium for this game. Most importantly, we discover a sufficient condition for generic multi-channel Power control to have a unique equilibrium in frequency-selective channels. Then we study the tradeoff between energy efficiency and spectral efficiency and show by simulation results that the proposed scheme improves both energy efficiency and spectral efficiency in an interference-limited multi-cell cellular network.

  • Interference-Aware Energy-Efficient Power Optimization
    2009 IEEE International Conference on Communications, 2009
    Co-Authors: G. Miao, N. Himayat, A. T. Koc, S. Talwar
    Abstract:

    While the demand for battery capacity on mobile devices has grown with the increase in high-bandwidth multimedia rich applications, battery technology has not kept up with this demand. Therefore Power Optimization techniques are becoming increasingly important in wireless system design. Power Optimization schemes are also important for interference management in wireless systems as interference resulting from aggressive spectral reuse and high Power transmission severely limits system performance. Although Power Optimization plays a pivotal role in both interference management and energy utilization, little research addresses their joint interaction. In this paper, we develop energy-efficient Power Optimization schemes for interference-limited communications. Both circuit and transmit Powers are considered and energy efficiency is emphasized over throughput. We note that the general Power Optimization problem in the presence of interference is intractable even when ideal user cooperation is assumed. We first study this problem for a simple two-user network with ideal user cooperation and then develop a practical non-cooperative Power Optimization scheme. Simulation results show that the proposed scheme improves not only energy efficiency but also spectral efficiency in an interference-limited cellular network.

G. Miao - One of the best experts on this subject based on the ideXlab platform.

  • distributed interference aware energy efficient Power Optimization
    IEEE Transactions on Wireless Communications, 2011
    Co-Authors: G. Miao, N. Himayat, Geoffrey Ye Li, S. Talwar
    Abstract:

    Power Optimization techniques are becoming increasingly important in wireless system design since battery technology has not kept up with the demand of mobile devices. They are also critical to interference management in wireless systems because interference usually results from both aggressive spectral reuse and high Power transmission and severely limits system performance. In this paper, we develop an energy-efficient Power Optimization scheme for interference-limited wireless communications. We consider both circuit and transmission Powers and focus on energy efficiency over throughput. We first investigate a non-cooperative game for energy-efficient Power Optimization in frequency-selective channels and reveal the conditions of the existence and uniqueness of the equilibrium for this game. Most importantly, we discover a sufficient condition for generic multi-channel Power control to have a unique equilibrium in frequency-selective channels. Then we study the tradeoff between energy efficiency and spectral efficiency and show by simulation results that the proposed scheme improves both energy efficiency and spectral efficiency in an interference-limited multi-cell cellular network.

  • Interference-Aware Energy-Efficient Power Optimization
    2009 IEEE International Conference on Communications, 2009
    Co-Authors: G. Miao, N. Himayat, A. T. Koc, S. Talwar
    Abstract:

    While the demand for battery capacity on mobile devices has grown with the increase in high-bandwidth multimedia rich applications, battery technology has not kept up with this demand. Therefore Power Optimization techniques are becoming increasingly important in wireless system design. Power Optimization schemes are also important for interference management in wireless systems as interference resulting from aggressive spectral reuse and high Power transmission severely limits system performance. Although Power Optimization plays a pivotal role in both interference management and energy utilization, little research addresses their joint interaction. In this paper, we develop energy-efficient Power Optimization schemes for interference-limited communications. Both circuit and transmit Powers are considered and energy efficiency is emphasized over throughput. We note that the general Power Optimization problem in the presence of interference is intractable even when ideal user cooperation is assumed. We first study this problem for a simple two-user network with ideal user cooperation and then develop a practical non-cooperative Power Optimization scheme. Simulation results show that the proposed scheme improves not only energy efficiency but also spectral efficiency in an interference-limited cellular network.

Minyou Chen - One of the best experts on this subject based on the ideXlab platform.

  • multi objective reactive Power Optimization strategy for distribution system with penetration of distributed generation
    International Journal of Electrical Power & Energy Systems, 2014
    Co-Authors: Shan Cheng, Minyou Chen
    Abstract:

    Abstract The study investigates multi-objective reactive Power Optimization (MORPO) of distribution system penetrated with distributed generation (DG). Integrating the reactive Power of DG as one type of decision variables, a multi-objective model for RPO has been established to decrease the system active Power loss, reduce voltage deviation and minimize the total capacity of reactive Power compensation (RPC) devices (or minimize investments on RPC devices). Instead of converting the multiple objectives into a single one, a dynamically adaptive multi-objective particle swarm Optimization (DAMOPSO) algorithm with introduction of special adaptive techniques has been proposed and validated and then applied to the MORPO problem with continuous and discrete variables. In order to the proposed MORPO model and the application of DAMOPSO, and to obtain a deep insight into MORPO with different objectives, a series of simulations on IEEE 33-bus system along with analysis and discussion are carried out. The results verified the feasibility and effectiveness of the proposed strategy.

Niraj K Jha - One of the best experts on this subject based on the ideXlab platform.

  • register transfer level Power Optimization with emphasis on glitch analysis and reduction
    IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 1999
    Co-Authors: Anand Raghunathan, Sujit Dey, Niraj K Jha
    Abstract:

    We present design-for-low-Power techniques for register-transfer level (RTL) controller/data path circuits. We analyze the generation and propagation of glitches in both the control and data path parts of the circuit. In data-flow intensive designs, glitching Power is primarily due to the chaining of arithmetic functional units. In control-flow intensive designs, on the other hand, multiplexer networks and registers dominate the total circuit Power consumption, and the control logic can generate a significant amount of glitches at its outputs, which in turn propagate through the data path to account for a large portion of the glitching Power in the entire circuit. Our analysis also highlights the relationship between the propagation of glitches from control signals and the bit-level correlation between data signals. Based on the analysis, we develop techniques that attempt to reduce glitching Power consumption by minimizing propagation of glitches in the RTL circuit. Our techniques include restructuring multiplexer networks (to enhance data correlations and eliminate glitchy control signals), clocking control signals, and inserting selective rising/falling delays, in order to kill the propagation of glitches from control as well as data signals. In addition, we present a procedure to automatically perform the well-known Power-reduction technique of clock gating through an efficient structural analysis of the RTL circuit, while avoiding the introduction of glitches on the clock signals. Application of the proposed Power Optimization techniques to several RTL circuits shows significant Power savings, with negligible area and delay overheads.

  • glitch analysis and reduction in register transfer level Power Optimization
    Design Automation Conference, 1996
    Co-Authors: Anand Raghunathan, Sujit Dey, Niraj K Jha
    Abstract:

    We present design-for-low-Power techniques based on glitch reduction for register-transfer level circuits. We analyze the generation and propagation of glitches in both the control and data path parts of the circuit. Based on the analysis, we develop techniques that attempt to reduce glitching Power consumption by minimizing generation and propagation of glitches in the RTL circuit. Our techniques include restructuring multiplexer networks (to enhance data correlations, eliminate glitchy control signals, and reduce glitches on data signals), clocking control signals, and inserting selective rising/falling delays. Our techniques are suited to control-flow intensive designs,where glitches generated at control signals have a significant impact on the circuit's Power consumption, and multiplexers and registers often account for a major portion of the total Power. Application of the proposed techniques to several examples shows significant Power savings, with negligible area and delay overheads.

N. Himayat - One of the best experts on this subject based on the ideXlab platform.

  • distributed interference aware energy efficient Power Optimization
    IEEE Transactions on Wireless Communications, 2011
    Co-Authors: G. Miao, N. Himayat, Geoffrey Ye Li, S. Talwar
    Abstract:

    Power Optimization techniques are becoming increasingly important in wireless system design since battery technology has not kept up with the demand of mobile devices. They are also critical to interference management in wireless systems because interference usually results from both aggressive spectral reuse and high Power transmission and severely limits system performance. In this paper, we develop an energy-efficient Power Optimization scheme for interference-limited wireless communications. We consider both circuit and transmission Powers and focus on energy efficiency over throughput. We first investigate a non-cooperative game for energy-efficient Power Optimization in frequency-selective channels and reveal the conditions of the existence and uniqueness of the equilibrium for this game. Most importantly, we discover a sufficient condition for generic multi-channel Power control to have a unique equilibrium in frequency-selective channels. Then we study the tradeoff between energy efficiency and spectral efficiency and show by simulation results that the proposed scheme improves both energy efficiency and spectral efficiency in an interference-limited multi-cell cellular network.

  • Interference-Aware Energy-Efficient Power Optimization
    2009 IEEE International Conference on Communications, 2009
    Co-Authors: G. Miao, N. Himayat, A. T. Koc, S. Talwar
    Abstract:

    While the demand for battery capacity on mobile devices has grown with the increase in high-bandwidth multimedia rich applications, battery technology has not kept up with this demand. Therefore Power Optimization techniques are becoming increasingly important in wireless system design. Power Optimization schemes are also important for interference management in wireless systems as interference resulting from aggressive spectral reuse and high Power transmission severely limits system performance. Although Power Optimization plays a pivotal role in both interference management and energy utilization, little research addresses their joint interaction. In this paper, we develop energy-efficient Power Optimization schemes for interference-limited communications. Both circuit and transmit Powers are considered and energy efficiency is emphasized over throughput. We note that the general Power Optimization problem in the presence of interference is intractable even when ideal user cooperation is assumed. We first study this problem for a simple two-user network with ideal user cooperation and then develop a practical non-cooperative Power Optimization scheme. Simulation results show that the proposed scheme improves not only energy efficiency but also spectral efficiency in an interference-limited cellular network.