北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2008, Vol. 31 ›› Issue (3): 107-110.doi: 10.13190/jbupt.200803.107.289

• 研究报告 • 上一篇    下一篇

两跳OFDM-AF中继系统的自适应比特和功率分配

周明宇1,2, 李立华1,2, 张 平1,2, 张晓夏1,2, 王海峰3   

  1. 1. 泛网无线通信教育部重点实验室(北京邮电大学),北京 100876; 2. 北京邮电大学 无线新技术研究所,北京 100876; 3. 诺基亚技术平台,上海200002
  • 收稿日期:2007-08-29 修回日期:1900-01-01 出版日期:2008-06-28 发布日期:2008-06-28
  • 通讯作者: 周明宇

Adaptive Bit and Power Allocation for Two Hop OFDM-AF Relaying Systems

ZHOU Ming-yu1,2, LI Li-hua1,2, ZHANG Ping1,2, ZHANG Xiao-xia1,2, WANG Hai-feng3   

  1. 1. Key Laboratory of Universal Wireless Communications (Beijing University of Posts and Telecommunications), Ministry of Education, Beijing 100876, China; 2. Beijing University of Posts and Telecommunications Wireless Technology Innovation Institute, Beijing 100876, China; 3. Technology Platform, Nokia, Shanghai 200002, China
  • Received:2007-08-29 Revised:1900-01-01 Online:2008-06-28 Published:2008-06-28
  • Contact: ZHOU Ming-yu

摘要:

将自适应比特和功率分配引入两跳正交频分复用-放大转发(OFDM-AF)中继系统,从而提出了该系统中的比特和功率分配的最优化问题;并结合贪婪算法的思想,提出了一种自适应比特和功率分配算法,在可靠传输要求和发送功率限制的条件下能最大化吞吐量.仿真结果表明,该算法在保证可靠传输的同时,大大提升了系统的有效性.

关键词: 中继系统, 正交频分复用, 放大转发, 自适应比特和功率分配

Abstract:

Adaptive bit and power allocation is introduced in two hop orthogonal frequency division multiplexing – amplify and forward (OFDM-AF) relaying systems. The optimization problem for bit and power allocation in the systems is presented. Aiming at the problem, an adaptive bit and power allocation algorithm is proposed, it takes advantage of the idea of Greedy algorithm to maximize throughput subject to the constraint of reliable transmission requirement and transmit power. Simulations indicate that the algorithm will improve the system availability greatly with guaranteeing reliable transmission.

Key words: relaying system, orthogonal frequency division multiplexing, amplify and forward, adaptive bit and power allocation

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