Joint channel pairing and power allocation optimization in two-way multichannel relaying.

We consider two-way amplify-and-forward relaying in a multichannel system with two end nodes and a single relay, using a two-slot multi-access broadcast (MABC) as well as time-division broadcast (TDBC) relaying strategies. We investigate the problem of joint subchannel pairing and power allocation to maximize the achievable sum-rate in the network, under an individual power budget at each node. To solve this challenging joint optimization problem, an iterative approach is proposed to decompose the problem into pairing optimization and joint power allocation optimization, and solve them iteratively. For given power allocation, we first consider the problem of subchannel pairing at the relay to maximize the achievable sum rate in TDBC-based network. Unlike in the one-way relaying case, our result shows that there exists no explicit SNR-based subchannel pairing strategy that is optimal for sum-rate maximization for two-way relaying. Nonetheless, for TDBC-based two way relaying, we formulate the pairing optimization as an axial 3-D assignment problem which is NP-hard, and propose an iterative optimization method to solve it with complexity O(N3). Based on SNR over each subchannel, we also propose sorting-based algorithms for scenarios with and without direct link, with a low complexity of O(N logN). For the joint power allocation at the relay and the two end nodes, we propose another iterative optimization procedure to optimize the power at the two end nodes and at the relay iteratively. By using different forms of optimization parameters, the sum-rate maximization problem turns out to be convex and the optimal solutions can be obtained for each subproblem. The simulation first demonstrates the proposed sorting-based pairing algorithm offers the performance very close to the iterative optimization method. Then, shows the gain of joint optimization approach over other pairing-only or power-allocation-only optimization approaches

Air Traffic Management Abbreviation Compendium

As in all fields of work, an unmanageable number of abbreviations are used today in aviation for terms, definitions, commands, standards and technical descriptions. This applies in general to the areas of aeronautical communication, navigation and surveillance, cockpit and air traffic control working positions, passenger and cargo transport, and all other areas of flight planning, organization and guidance. In addition, many abbreviations are used more than once or have different meanings in different languages. In order to obtain an overview of the most common abbreviations used in air traffic management, organizations like EUROCONTROL, FAA, DWD and DLR have published lists of abbreviations in the past, which have also been enclosed in this document. In addition, abbreviations from some larger international projects related to aviation have been included to provide users with a directory as complete as possible. This means that the second edition of the Air Traffic Management Abbreviation Compendium includes now around 16,500 abbreviations and acronyms from the field of aviation

Texas Register

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code

The Whitworthian 2004-2005

The Whitworthian student newspaper, September 2004-May 2005.https://digitalcommons.whitworth.edu/whitworthian/1088/thumbnail.jp

Economic development partnerships in France : an empirical investigation of inter-organisational learning processes

This dissertation focuses on partnership learning in the context of economic development policy implementation. In the field of business support services, local partnerships' ability to engage in inter-organisational learning can shape the effectiveness of their services, their impact on regional development and governance systems. Where partners are able to change their partnership'S tacit norms and values, strong synergies could be achieved, sustainable double-loop learning may occur. But when a partnership is unable to transcend each collaborating partner's agenda, organisational rivalry, conflict of interest and power struggles can inhibit collaborative learning. We need to understand the processes that underpin partnership learning and unveil how partnerships can overcome the crises and conflicts bound to occur during their existence. The empirical investigation of the issues outlined above is conducted in the context of the French government's Reseau de Diffusion Technologique initiative. The study is conducted using a case study format, following interpretive traditions in social sciences. Presence Rhone-Alpes (PRA) and Reseau Nord Pas de Calais Technologie (NPC) were selected as polar cases. The findings indicate that the broad notion of partnership learning can be analysed in terms of social learning and process learning. Specifically, process learning (linked with the implementation of operational goals) is strongly dependent on pre-requisite tacit knowledge developed through social learning. Indeed the comparative analysis demonstrated that although both partnerships had similar problems, only PRA was able to resolve the deep-rooted causes of crises it experienced through the progressive creation of a governing elite in the region. The presence of such an elite, with clear - albeit tacit- rules for decision making, facilitated partnership "process learning", which meant that negotiations over operational objectives, partnership strategy and even regional policy became opportunities to exert influence and collective power as opposed to instances where collaborating organisations fought to protect their individual turf.EThOS - Electronic Theses Online ServiceDe Montfort University. Faculty of Business and LawGBUnited Kingdo

The 11th Space Simulation Conference

Subject areas range from specialized issues dealing with the space and entry environments to the environmental testing of systems and complete spacecraft of present-day vintage. Various papers consider: the test and development of several key systems of the orbiter vehicle; integrated tests of complete satellites; new and unique test facilities developed to meet the demanding requirements of high fidelity simulation of test environments; and contamination species, including the instrumentation for detection and measurement of such. Special topics include improved thermal protection methodologies and approaches, sophisticated sensor developments, and other related testing and development areas