Joint Optimal Subcarrier and Power Allocation for Wireless Cooperative Networks Over OFDM Fading Channels

Wang, Di; Li, Zhaoquan; Wang, Xin

doi:10.1109/tvt.2011.2175409

Cited by 37 publications

(42 citation statements)

References 22 publications

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“…By the formula (6) and formula (8) can see that the capacity and the error probability has a nonlinear relationship, namely that when the capacity is optimal, the error rate is not always optimal. So it is not perfect to use the optimal value of any index of the capacity or the error probability as the objective function to optimize the power allocation.…”

Section: Relationship Between Capacity and Error Probabilitymentioning

confidence: 99%

“…Therefore, it is an important problem in the field of cooperative communication technology, namely, how to reasonably allocate power to improve the performance of cooperative communication system. At present, the power allocation scheme based on cooperative communication has become a research hotspot [3][4].…”

Section: Introductionmentioning

confidence: 99%

“…The method use the minimum transmit power as the goal and verify the effectiveness of the scheme, but the scheme has certain limitations with the error probability limited. In the aspect of power allocation based on capacity, Wang et al [8] propose to maximize the capacity as the optimization goal, and gives the power allocation scheme based on water filling algorithm, but the program is only for two base stations did not involve two or more base stations of the cooperative communication situation. Xiao Hailin [9] propose to maximize the capacity as the optimization goal to solve the power allocation problem of cooperative communication system, and gives the comparison of power allocation scheme based on genetic algorithm and particle swarm optimization algorithm, but focuses only on the selection of algorithms and lack of in-depth study on the power allocation scheme.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimization of power allocation in wireless cooperative communication system

Liu

Mou

Pan

2017

AIP Conference Proceedings

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Section: Relationship Between Capacity and Error Probabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of power allocation in wireless cooperative communication system

Liu

Mou

Pan

2017

AIP Conference Proceedings

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“…It is clearly that the approximate measure will reduce the performance. Wang et al (2012a) propose a sub-carrier cooperation and user grouping method. The method can apparently reduce computational complexity.…”

Section: Introductionmentioning

confidence: 99%

A resource allocation evolutionary algorithm for OFDM system

Wang

Liu

Li³

et al. 2017

IJCSE

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Abstract:Resource allocation for orthogonal frequency division multiplexing Orthogonal Frequency Division Multiplexing (OFDM) system, as a core technology for the 4th generation mobile communication system, has shown significant importance in the improvement of system transmission rate. At present, the two-step algorithm is described as a main method to deal with resource allocation for OFDM system. As carrier allocation and power allocation are not independent of each other, the two-step algorithm may result in lower complexity but poor convergence. This paper proposes a mixed evolutionary algorithm to allocate sub-carrier and power at the same time. It combines the simulated annealing algorithm and evolutionary algorithm. This paper also improves the definition of fairness in OFDM system. It can achieves perfect fairness among users while maintaining the efficient capacity performance. Simulation results demonstrate that the proposed resource allocation algorithm can achieve perfect performance, and increase the convergence rate greatly meanwhile efficiently improving the system capacity.Keywords: OFDM; resource allocation; evolutionary algorithm; simulated annealing algorithm.Reference to this paper should be made as follows: Wang, Q., Liu, H-L., Li, J-c. and Li, Y. Q. Wang et al.This paper is a revised and expanded version of a paper entitled 'Resource allocation for OFDM system based on evolutionary algorithm' presented at International

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“…Capacity and throughput can also be enhanced through cooperative resource sharing and scheduling among nodes within a network. At present, the joint subcarrier and power allocation problem is often formulated as an optimization problem of maximizing the system throughput or the weighted sum rate under the total sum power constraint and the individual power constraint, respectively [6], [7], [8], [9], [10], [11], [12]. The proposed strategies are based on nonlinear programming and the Lagrangian dual decomposition method.…”

Section: Introductionmentioning

confidence: 99%

Joint Subcarrier Pairing and Power Allocation in OFDMA Cooperative Relay Networks

Guo

Chunrong

2014

2014 Asia-Pacific Services Computing Conference

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In this paper, we propose a joint subcarrier pairing and power allocation (JS2PA) scheme with fairness based on the Intelligent Water Drop (IWD) optimization method for Orthogonal Frequency Division Multiple Access (OFDMA) cooperative relay networks. The proposed scheme consists of a subcarrier pairing and selection algorithm and a power allocation algorithm. We first formulate the JS2PA problem as a mixed integer programming problem aiming to maximize the total network utility under the constraints of the total and individual power, subcarrier fairness requirement and pairing. To solve the non-convex JS2PA problem, firstly, we propose a subcarrier pairing and selection algorithm based on Hungarian method so as to select the appropriate subcarrier pairs for relaying. Secondly, we provide a power allocation algorithm based on the IWD method (PA-MIWD) in which water drops act as the agents to find the optimal power allocation for each node. Finally, we conduct simulations to validate the proposed algorithms and the results show that the proposed JS2PA scheme outperforms the existing methods in terms of convergence and total network utility.

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Joint Optimal Subcarrier and Power Allocation for Wireless Cooperative Networks Over OFDM Fading Channels

Cited by 37 publications

References 22 publications

Optimization of power allocation in wireless cooperative communication system

Optimization of power allocation in wireless cooperative communication system

A resource allocation evolutionary algorithm for OFDM system

Joint Subcarrier Pairing and Power Allocation in OFDMA Cooperative Relay Networks

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