Based on the key technology research in B3G-TDD systems, Link Adaptation in multi-user OFDM systems are researched in this dissertation.
本文建立在本实验室B3G - TDD系统研究的基础上，主要研究多用户OFDM系统中的链路自适应技术。
Link adaptation transmission is a vital technology for OFDMA system, and it has great effect on the performance.
链路自适应传输是正交频分多址系统关键技术，对提升系统性能起到关键作用。
This paper studied the link adaptation solution of adaptive multi-rate (AMR) speed coding technology.
对自适应多速率编码（AMR）技术的链路适配方案进行了研究。
In chapter 3, link level adaptation technology, especially HARQ, IR and AMC are introduced respectively. And we discuss and analyze the HARQ performance in TDD-LTE system.
第三章介绍了链路关键技术的概念、基本原理，着重讨论和分析了TDD - LTE系统中harq的性能。
In chapter 3, link level adaptation technology, especially HARQ, IR and AMC are introduced respectively. And we discuss and analyze the HARQ performance in TDD-LTE system.
第三章介绍了链路关键技术的概念、基本原理，着重讨论和分析了TDD - LTE系统中harq的性能。
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