Proportional Resource Allocation in OFDMA Systems Based on Weighted Normalized User's CSI

Shrestha, Robin; Kim, Jae Moung

doi:10.1587/transcom.e95.b.2137

Cited by 1 publication

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References 9 publications

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“…In current multiuser wireless networks where some resources such as frequency, time, and space are usually shared among different users, interference appears and becomes the bottleneck of the throughput of the system. Many scholars have focused on interference management techniques to eliminate the interference [1] and to maximize the sum rate [2], and interference alignment (IA) is a novel scheme that can mitigate the interference and thus increase the total throughput significantly [3]. Cadambe and Jafar showed that the degrees of freedom (DoFs) of the multiple-input multiple-output (MIMO) communication system scale proportionally to the number of users by employing IA in the high signal-to-noise ratio (SNR) regime in [4].…”

Section: Introductionmentioning

confidence: 99%

A Rapid Convergent Max-SINR Algorithm for Interference Alignment Based on Principle Direction Search

2015

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The maximal signal-to-interference-plus-noise ratio (Max-SINR) algorithm for interference alignment (IA) has received considerable attention for its high sum rate achievement in the multiple-input multiple-output (MIMO) interference channel. However, its complexity may increase dramatically when the number of users approaches the IA feasibility bound, and the number of iterations and computational time may become unacceptable. In this paper, we study the properties of the Max-SINR algorithm thoroughly by presenting theoretical insight into the algorithm and by providing the potential of reducing the overall computational cost. Furthermore, a novel IA algorithm based on the principle direction search is proposed, which can converge more rapidly than the conventional Max-SINR method. In the proposed algorithm, it searches along the principle direction, which is found to approximately point to the convergence values, and can approach the convergence solutions rapidly. In addition, the closed-form solution of the optimal step size can be formulated in the sense of minimal interference leakage. Simulation results demonstrate that the proposed algorithm outperforms the conventional minimal interference leakage and Max-SINR algorithms in terms of the convergence rate while guaranteeing the high throughput of IA networks.

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Section: Introductionmentioning

confidence: 99%

A Rapid Convergent Max-SINR Algorithm for Interference Alignment Based on Principle Direction Search

2015

KSII TIIS

View full text Add to dashboard Cite

show abstract

Proportional Resource Allocation in OFDMA Systems Based on Weighted Normalized User's CSI

Cited by 1 publication

References 9 publications

A Rapid Convergent Max-SINR Algorithm for Interference Alignment Based on Principle Direction Search

A Rapid Convergent Max-SINR Algorithm for Interference Alignment Based on Principle Direction Search

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