Power control and performance analysis of cognitive radio systems under dynamic spectrum activity and imperfect knowledge of system state

Ruan, Liangzhong; Lau, V.K.N.

doi:10.1109/twc.2009.080789

Cited by 11 publications

(10 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The presented analysis seems to be different to the power allocation procedures, presented in the known literature [5][6][7], at least by two features:…”

Section: Commentscontrasting

confidence: 62%

“…The optimum algorithm is well known: it is water-filling approach proposed by R. Gallager, but its implementation might be rather complex (see [5]- [6]); x If N Ȟ is chosen, then assuming that for propagation conditions(see below), subcarriers are accumulated into sub-bands, which will be considered in the following (see Sec. III);so it is reasonable to make power allocation to sub-bands, as for concrete channel between AP (FC) and SU all "L" subcarriers of the sub-band have the same fading characteristics and cannot be distinguished.…”

Section: Concretization Of the Problemmentioning

confidence: 99%

“…This is a nature way for power (resource) allocation in such kind of channels and it is a main difference of problem formulation above and [5][6][7] where channels are considered as narrow-band ones.…”

Section: Commentsmentioning

confidence: 99%

“…1 (see also [5]- [6]). Here PU Rx , PU Tx are receiving and transmitting terminals for PU; SU Rx , SU Tx are receiving and transmitting terminals for SU respectively and AP (FC) is an access point for SU.…”

Section: Introductionmentioning

confidence: 98%

See 3 more Smart Citations

Power allocation for cognitive users applying OFDM under dynamic spectrum activity

Filio

Primak

Kontorovich

2012

2012 8th International Caribbean Conference on Devices, Circuits and Systems (ICCDCS)

View full text Add to dashboard Cite

In this paper a new and original approach for power allocation for cognitive users is proposed. The approach is based on the application of the order statistics (maximum terms of the variation series) for instantaneous SNR levels. Contrary to the widely applied methods, in the proposed approach, power is allocated to the groups of the OFDM subcarriers which suffer the same flat fading. It is shown by means of an example how results of this method can be compared with the sub-optimum results of the nonlinear programming presented before.

show abstract

“…The presented analysis seems to be different to the power allocation procedures, presented in the known literature [5][6][7], at least by two features:…”

Section: Commentscontrasting

confidence: 62%

Section: Concretization Of the Problemmentioning

confidence: 99%

Section: Commentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Power allocation for cognitive users applying OFDM under dynamic spectrum activity

Filio

Primak

Kontorovich

2012

2012 8th International Caribbean Conference on Devices, Circuits and Systems (ICCDCS)

View full text Add to dashboard Cite

show abstract

“…In the literature, a number of research contributions, which aim to provide a balance between energy consumption and performance have been reported for different wireless communication systems [3]- [6]. Most of these works assume that the energies are supplied by a constant energy source and/or a rechargeable battery.…”

Section: Introductionmentioning

confidence: 99%

Optimal power allocation for a hybrid energy harvesting transmitter

Ahmed

Ikhled

et al. 2013

2013 IEEE International Conference on Communications (ICC)

View full text Add to dashboard Cite

In this work, we consider a point-to-point link where the transmitter has a hybrid supply of energy, i.e., the energy is supplied by a constant energy source and an energy harvester, which harvests energy from its surrounding environment. Our goal is to jointly minimize the power consumed by the constant energy source and any possible waste of the harvested energy to ensure their optimum utilization for transmission of a given amount of data in a given number of time intervals. Two scenarios are considered for packet arrival. In the first scenario, we assume that all data packets have arrived before the transmission begins, whereas in the second scenario, we assume that data packets are arriving during the course of data transmission. For both scenarios, we propose optimal offline transmit power allocation schemes which provide insight on how to efficiently consume the energy supplied by the constant energy source and the energy harvester.

show abstract

Introduction

Gunawardena

Zhuang

2014

Modeling and Analysis of Voice and Data in Cognitive Radio Networks

View full text Add to dashboard Cite

Power control and performance analysis of cognitive radio systems under dynamic spectrum activity and imperfect knowledge of system state

Cited by 11 publications

References 13 publications

Power allocation for cognitive users applying OFDM under dynamic spectrum activity

Power allocation for cognitive users applying OFDM under dynamic spectrum activity

Optimal power allocation for a hybrid energy harvesting transmitter

Introduction

Contact Info

Product

Resources

About