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 (6): 85-89.doi: 10.13190/jbupt.200806.85.guoll

• 研究报告 • 上一篇    下一篇

时延反馈下的自适应STBC-Beamforming跨层设计

郭丽丽, 岳殿武   

  1. (大连海事大学 信息科学技术学院, 大连 116026)
  • 收稿日期:2008-03-15 修回日期:2008-07-21 出版日期:2008-12-31 发布日期:2008-12-31
  • 通讯作者: 郭丽丽

Adaptive STBC-Beamforming Cross-layer Design under Outdated Feedback

GUO Li-li, YUE Dian-wu   

  1. (College of Information Science and Technology, Dalian Maritime University, Dalian 116026,China)
  • Received:2008-03-15 Revised:2008-07-21 Online:2008-12-31 Published:2008-12-31
  • Contact: GUO Li-li

摘要:

为提高无线通信网络的频谱效率,提出了一种自适应STBC-Beamforming跨层设计方案. 该方案利用自适应编码调制技术和混合自动重传技术交互协作,使发射端可以根据反馈的延时信息自适应调节调制模式,选择发射权以及自动重传数据.推导了系统在时延反馈条件下的频谱效率和中断概率的闭合表达式,分析了时延反馈对于系统性能的影响.仿真结果表明,对比单发/单收跨层系统和Alamouti’s跨层系统,自适应STBC-Beamforming跨层系统的性能有明显提高.

关键词: 跨层设计, 自适应编码调制, 混合自动重传, 波束成形, 时延反馈信道

Abstract:

An Adaptive STBC-Beamforming cross-layer design scheme is proposed to improve wireless communication network’s spectral efficiencies. The scheme is scheduled through combining multi-level adaptive modulation and coding with hybrid automatic repeat request protocol. The transmitter updates the modulation mode, chooses the optimal transmission vector adaptively and retransmits data automatically by outdated feedback information. The close-form expressions of cross-layer system for spectral efficiencies and the probability of outage under outdated feedback are obtained. Effects of outdated feedback on system’s performance are analyzed. Simulations show that, compared to SISO cross-layer system and Alamouti’s cross-layer system, the performance of the adaptive STBC-Beamforming cross-layer system is observably enhanced.

Key words: Cross-layer design, adaptive modulation and coding (AMC), hybrid-automatic repeat request (H-ARQ), beamforming, outdated feedback channel

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