|CDMA data networks such as the Qualcomm High Data Rate (HDR) are proposed in the midst of evolving to the 3rd generation wireless networks. The downlink transmission power is xed for all users in HDR systems unlikely IS-95 systems that are designed for the voice service only. The HDR systems endeavour to utilize the bandwidth eÆciently by selecting the optimal transmission rate for the current...

In wireless network uplink communications, there is a tradeoff between transmission coordination to avoid overload situations, and distributed transmission decisions to adapt to fast channel variations. Here, uplink transmission timing (UTT) is proposed as a scheme to allow some load control support, while transmitting mainly when the channel is favorable. It utilizes channel state feedback in ...

We investigate the timescales for channel assignment, power control, and rate control in a metropolitan mesh network with links whose distances range from 1.6 to 5 Km. In particular, for channel assignment we consider a procedure that accounts for both intra-network and external interference, and investigate the timescale at which channels need to be re-assigned in order to achieve high perform...

Wireless sensor networks collect data from several nodes dispersed at remote sites. Sensor nodes can be installed in harsh environments such as deserts, cities, and indoors, where the link quality changes considerably over time. Particularly, changes in transmission power may be caused by temperature, humidity, and other factors. In order to compensate for link quality changes, existing schemes...

Long distance AC transmission is often subject to stability problems , which limits the transmission capability.Large interconnected power systems often suffer from weakly damped swings between synchronous generators and subsystems.This paper presents two methods , based on the use of nonlinear system model , to improve transient stability and damping of power swings using UPFC. A statevariable...

1.1 General Introduction During the past two decades, the increase in electrical energy demand has presented higher requirements from the power industry. More power plants, substations, and transmission lines need to be constructed. However, the most commonly used devices in present power grid are the mechanically-controlled circuit breakers. The long switching periods and discrete operation ma...

As a new power transmission technology, magnetically coupled resonant wireless power transmission technology can achieve mid-range wireless power transmission with the advantage of high transmission efficiency. As known, the driving source has a significant impact on the overall performance of wireless power transmission system. With this consideration, a pulse-driven magnetically coupled reson...

The Interline Power Flow Controller (IPFC) is one of the Voltage Source Converter (VSC) based facts controllers which can effectively manage the power flow via multi-line transmission system. In this paper a new method for control of IPFC, with the aim of managing the power flow in transmission lines is presented. Simplicity and fast system response are two characteristics of this method. An IP...