Subcarrier Pairing and Power Allocation Algorithm for OFDM Relay Systems with Delay QoS Guarantees

HUANG Gao-fei; LUO Li-ping; ZHANG Guang-chi; TANG Dong; QIN Jia-yin

doi:10.3969/j.issn.0372-2112.2013.02.020

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Subcarrier Pairing and Power Allocation Algorithm for OFDM Relay Systems with Delay QoS Guarantees

更新时间：2025-07-16

- Subcarrier Pairing and Power Allocation Algorithm for OFDM Relay Systems with Delay QoS Guarantees
- Acta Electronica Sinica Vol. 41, Issue 2, Pages: 335-339(2013)
- 作者机构：
  
  1. 广州大学机械与电气工程学院,广东,广州,510006
  2. 中山大学信息科学与技术学院,广东,广州,510275
  3. 广西民族大学信息科学与工程学院,广西,南宁,530006
  4. 广东工业大学信息工程学院,广东,广州,510006
  5. 广州大学机械与电气工程学院广东广州,510006
  6. 中山大学信息科学与技术学院广东广州,510275
  7. 广西民族大学信息科学与工程学院广西南宁,530006
  8. 广东工业大学信息工程学院广东广州,510006
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2013.02.020
  CLC： TN911.5
- Published：2013
- 稿件说明：
移动端阅览
HUANG Gao-fei, LUO Li-ping, ZHANG Guang-chi, et al. Subcarrier Pairing and Power Allocation Algorithm for OFDM Relay Systems with Delay QoS Guarantees[J]. Acta Electronica Sinica, 2013, 41(2): 335-339.
DOI：

HUANG Gao-fei, LUO Li-ping, ZHANG Guang-chi, et al. Subcarrier Pairing and Power Allocation Algorithm for OFDM Relay Systems with Delay QoS Guarantees[J]. Acta Electronica Sinica, 2013, 41(2): 335-339. DOI： 10.3969/j.issn.0372-2112.2013.02.020.

摘要

本文研究具有直接通信链路的OFDM解码转发(Decode-and-Forward

DF)中继系统的子载波配对与功率分配算法

目标是在满足业务时延QoS要求的前提下最大化系统容量.利用有效容量模型

首先把OFDM DF中继系统的子载波配对与功率分配问题形成为混合整数规划问题

然后把其转化为连续松弛凸规划问题

利用凸优化方法得到原问题的最优解

从而提出了一种联合最优的子载波配对与功率分配迭代算法.理论推导结果和仿真结果表明

最优子载波配对与功率分配不仅取决于子载波的信道增益

还取决于业务的时延QoS要求.与已有算法相比

本文算法获得的有效容量最大.

Abstract

In this paper

the subcarrier pairing and power allocation algorithm for OFDM decode-and-forward (DF) relay systems with direct link is investigated.The goal is to maximize the system throughput while meeting the delay QoS requirements of transmission services.Firstly

by integrating the effective capacity model

the subcarrier pairing and power allocation problem is formulated as a mixed integer programming problem.Then

the problem is transformed into a continuous relaxed convex problem.By using the convex optimization theory

the optimal solution of the primal problem is obtained

and an alternative algorithm to achieve jointly optimal subcarrier pairing and power allocation is proposed.The derived analytical and simulation results show that both the optimal subcarrier pairing and power allocation depend on not only the channel quality of the subcarriers but also the delay QoS requirements of the service.Compared with the existing algorithms

our proposed algorithm achieves the highest effective capacity.

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