Robust power and subcarrier allocation algorithm for cognitive network based on interference efficiency maximization

Yongjun XU; Yang YANG; Qilie LIU; Qianbin CHEN; Jinzhao LIN

doi:10.11959/j.issn.1000-436x.2020007

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Robust power and subcarrier allocation algorithm for cognitive network based on interference efficiency maximization

Papers | 更新时间：2024-06-05

- Robust power and subcarrier allocation algorithm for cognitive network based on interference efficiency maximization
- Journal on Communications Vol. 41, Issue 1, Pages: 84-93(2020)
- 作者机构：
  
  1. 重庆邮电大学通信与信息工程学院，重庆 400065
  2. 山东大学山东省移动通信技术重点实验室，山东济南 250100
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61601071);The National Natural Science Foundation of China(61671091);The Science and Technology Research Program of Chongqing Municipal Education Commission(KJQN201800606);The Science and Technology Research Program of Chongqing Municipal Education Commission(KJZD-K201900605);The Open Research Fund From Shandong Provincial Key Lab of Wireless Communication Technologies,Shandong University(SDKLWCT-2019-04);Chongqing Science and Technology Innovation Leading Talent Support Program(CSTCCXLJRC201908);The Basic and Advanced Research Projects of CSTC(2019jcyj-zdxmX0008)
- DOI：10.11959/j.issn.1000-436x.2020007
  CLC： TN918.82
- Online First：2020-01，
  
  Published：25 January 2020
- 稿件说明：
移动端阅览
Yongjun XU, Yang YANG, Qilie LIU, et al. Robust power and subcarrier allocation algorithm for cognitive network based on interference efficiency maximization[J]. Journal on Communications, 2020, 41(1): 84-93.
DOI：

Yongjun XU, Yang YANG, Qilie LIU, et al. Robust power and subcarrier allocation algorithm for cognitive network based on interference efficiency maximization[J]. Journal on Communications, 2020, 41(1): 84-93. DOI： 10.11959/j.issn.1000-436x.2020007.

摘要

针对认知正交频分多址接入（OFDMA）上行通信系统，提出了一种基于干扰效率最大的稳健功率与子载波分配算法。首先，考虑主用户干扰约束、次用户发射功率约束、子载波分配约束和次用户最小速率约束，建立基于中断概率的稳健资源优化模型。然后，利用伯恩斯坦近似和Dinkelbach法，将原基于中断概率的非凸问题转换成等价凸优化问题，并利用拉格朗日对偶函数法求得解析解。同时，分析了算法的计算复杂度和稳健灵敏度。仿真结果表明，所提算法具有较好的干扰效率和稳健性。

Abstract

For the cognitive OFDMA uplink communication system

a robust power and subcarrier allocation algorithm based on maximum interference efficiency was proposed.Firstly

considering primary user interference constraint

secondary user transmit power constraint

subcarrier allocation constraint and secondary user minimum rate constraint

a robust resource optimization model based on outage probability was established.Then

by using Bernstein approximation and Dinkelbach’s method

the original non-convex problem based on outage probability was transformed into an equivalent convex optimization one

and the analytical solution was obtained by Lagrangian dual function method.Meanwhile

the computational complexity and robust sensitivity of the algorithm were analyzed.The simulation results show that the proposed algorithm has better interference efficiency and robustness.

关键词

Keywords

references

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