Optimal power allocation in relay-based CR system with enhanced network lifetime

Maji, Chinmoy; Maity, Santi P.; Acharya, Tamaghna

doi:10.1109/iswcs.2012.6328470

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…After separately receiving yS i D i and yR i D i in two time slots, the cognitive destination node Di uses maximum ratio combining (MRC) to deal with them, the received signalinterference-noise ratio SINRD i of the cognitive destination node is [10]…”

Section: Signal Transmission Modelmentioning

confidence: 99%

Distributed Power Control in Cooperative Cognitive Ad hoc Networks

Wang

Jiang

Liu

2014

Int. J. Autom. Comput.

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In this paper, a relay selection strategy and distributed power control algorithm are proposed for the underlay spectrum sharing mode based cooperative cognitive ad hoc network with energy-limited users. The study aims to minimize the total power consumption of cooperative cognitive ad hoc network while ensuring the quality of service (QoS) requirement of cognitive user and keeping the interference to primary user below interference tolerance. The power control problem is transformed into a convex optimization problem. Based on Lagrange dual decomposition theory, a gradient iterative algorithm is constructed to search for the optimal solution and complete distributed power optimization. Simulation results show that the algorithm converges fast and reduces transmit power of cognitive users effectively while guaranteeing the QoS requirement.

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Section: Signal Transmission Modelmentioning

confidence: 99%