In this paper, optimal power allocation and relay selection strategies in energy harvesting cooperative wireless networks are studied. In particular, signal-to-noise ratio (SNR)-maximizing based power allocation and relay selection without and with energy cooperation—via wireless energy transfer—are considered. Moreover, total relay power minimization subject to target end-to-end SNR is investi...

Cross-layer design approaches are critical to efficiently utilize radio resources. Resource allocation decision is made by assuming a single user. Multiple access scheme used is an Orthogonal Frequency Division Multiple Access (OFDM). With the goal of choosing best error detection technique, various techniques are compared. A resource allocation algorithm is required to efficiently allocate pow...

Several power allocation algorithms for cooperative relay networks are presented in the literature. These contributions assume perfect channel knowledge and capacity achieving codes. However in practice, obtaining the channel state information at a relay or at the destination is an estimation problem and can generally not be error free. The investigation of the power allocation mechanism in a w...

M.Padmaja, K.Prasuna Assistant Professor, VR Siddhartha Engineering College, Vijayawada (A.P), INDIA [email protected] Assistant Professor, Vijaya Institute of Technologyforwomen, Vijayawada (A.P), INDIA [email protected] AbstractOptimized root mean square error plays an important role in the analysis of wireless transmission. In this paper, an optimized power allocation method is con...

We consider throughput-optimal power allocation in multi-hop wireless networks. The study of this problem has been limited due to the non-convexity of the underlying optimization problems, that prohibits an efficient solution even in a centralized setting. We take a randomization approach to deal with this difficulty. To this end, we generalize the randomization framework originally proposed fo...

This paper investigates the adaptive subcarrier and bit allocation algorithm for OFDMA systems. To minimize overall transmitted power, we propose a novel adaptive subcarrier and bit allocation algorithm based on channel state information (CSI) and quality state information (QSI). A suboptimal approach that separately performs subcarrier allocation and bit loading is proposed. It is shown that a...

In this paper, we consider the joint problem of relay selection and optimal power allocation for multi-relay amplify-and-forward (AF) cooperative communication system over frequency selective fading channels. An optimization model combined relay selection and power allocation under a total transmission power budget is formulated. Then, this combinatorial problem is solved in a distributed strat...

M.Padmaja , K.Prasuna 2 Assistant Professor, VR Siddhartha Engineering College, Vijayawada (A.P), INDIA [email protected] Assistant Professor, Vijaya Institute of Technologyforwomen, Vijayawada (A.P), INDIA [email protected] AbstractOptimized root mean square error plays an important role in the analysis of wireless transmission. In this paper, an optimized power allocation method is ...

Sex allocation in colonies of eusocial Hymenoptera is one of the best studied social conflicts. We outline a framework for analysing conflict outcome through power and the costs of manipulation and suggest that the conflict will often be unresolved because both major parties of interest, the queen and the workers, should manipulate allocation even at considerable costs to the colony. We suggest...

In this paper we investigate power allocation and crosstalk cancellation for MIMO-DSL (a.k.a. bonded-DSL) systems. Exploiting a property of the DSL channel, namely columnwise diagonal dominance, allows us to simplify the power allocation and crosstalk cancellation problems. This leads to a significant reduction in initialisation and run-time complexity whilst maintaining near-optimal performanc...