نتایج جستجو برای: power transmission control
تعداد نتایج: 1937358 فیلتر نتایج به سال:
Multi-Radio Multi-Channel (MRMC) WMNs result in power control problems including interference, un-scalable connectivity and energyconsumption. Several previous studies have focused on the single radio wireless configurations while studying power control problems. However, such contributions can not solve the power control problems in MRMC configurations because of the architectural and structur...
A Per-User QoS Enhancement Strategy via Downlink Cooperative Transmission Using Distributed Antennas
In this letter, we address a strategy to enhance the signalto-interference plus noise ratio (SINR) of the worst-case user by using cooperative transmission from a set of geographically separated antennas. Unlike previously reported schemes which are based on either the power control of individual antennas or cooperative orthogonal transmission, the presented strategy utilizes the minimum-mean-s...
This paper presents a survey of voltage/Var control techniques. It introduces both the control devices for individual reactive power sources and several popular control systems (OPRF, hierarchical voltage control, expert system and fuzzy logic) for whole power transmission network. 2. REACTIVE POWER SOURCES AND THEIR CONTROL DEVICES
the Flexible AC transmission system (FACTS) is a technology, which is based on power electronic devices, used to enhance the existing transmission capabilities in order to make the transmission system flexible and independent operation. The FACTS technology is a promising technology to achieve complete deregulation of Power System i.e. Generation, Transmission and Distribution as complete indiv...
Abstract. In this paper, we propose a game theoretic solution for joint channel selection and power allocation in cognitive radio networks. Our proposed algorithm enforces cooperation among nodes in an effort to reduce the overall energy consumption in the network. For designing the power control, we consider both the case in which no transmission power constraints are imposed, as well as the m...
|This paper proposes a transmission power control scheme for downlinks in CDMA/shared{TDD cellular packet systems that experience inter-cell interference between uplinks and downlinks. The proposed scheme increases the downlink transmission power for re-transmission packets and thus improves the signalto-interference ratio for the packets. Simulation results show that the proposed scheme improv...
Multi-phase transmission systems is considered potential alternative to conventional three-phase systems for bulk power transmission. Recent survey shows that the integration of flexible A.C. transmission system devices into conventional three-phase transmission system for enhancement and control of power flow is well established. This paper attempts to study: a FACTS device i.e. thyristor cont...
existed electricity grids deliver produced power to the consumer passing through transmission and distribution grids. According to high losses of these grids in transmission level and inexistence of bilateral interaction for simultaneous information exchange, a concept of smart grids were made by capabilities such as consciously participation of consumers in the smart electricity grids, an amou...
Historically, the primary barrier to greater competition in the electricity industry has been the vertical integration of most firms. Control of the transmission grid can advantage some competitors at the expense of others. In electricity markets around the world, policymakers have attempted to solve this problem through the creation of independent ‘gridcos’ or ‘system operators’ that either ow...
In this thesis, adaptive transmission power control algorithms for reliable communication in channels with state are explored and further developed. In channels with state, strict adherence to Shannon-sense capacity may lead to very conservative system designs. In many practical systems, error-free communication is not required because these systems can cope with decoding errors. These consider...
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