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计算机工程 ›› 2012, Vol. 38 ›› Issue (23): 75-78.doi: 10.3969/j.issn.1000-3428.2012.23.018

• 网络与通信 • 上一篇    下一篇

一种基于LTE-A的联合自适应传输方法

田 攀1，芮 赟2，李明齐2，郑 敏1，卜智勇1   

  1. (1. 中国科学院上海微系统与信息技术研究所，上海 200050；2. 中国科学院上海高等研究院，上海 201210)
  • 收稿日期:2012-02-20 出版日期:2012-12-05 发布日期:2012-12-03
  • 作者简介:田 攀(1987－)，男，硕士研究生，主研方向：宽带无线通信系统，软件无线电；芮 赟，副研究员；李明齐，研究员；郑 敏，副研究员；卜智勇，研究员
  • 基金项目:
    国家“十一五”重大专项基金资助项目(2009ZX03003-006-03)；上海市自然科学基金资助项目(10ZR1436000)；国家广电总局科研基金资助项目(2011-28)

A Hybrid Adaptive Transmission Method Based on LTE-A

TIAN Pan 1, RUI Yun 2, LI Ming-qi 2, ZHENG Min 1, BU Zhi-yong 1   

  1. (1. Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China; 2. Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China)
  • Received:2012-02-20 Online:2012-12-05 Published:2012-12-03

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摘要： LTE-A上行每帧数据在自适应传输时，不能实时切换为分簇的DFT-S-OFDM和N×SC-FDMA系统。为此，提出一种联合自适应调制编码方法。该方法依据接收端的信干噪比，分别预测下一帧在采用分簇的DFT-S-OFDM和N×SC-FDMA进行自适应传输时的吞吐量，选择吞吐量大的系统及相应的调制编码方式在下一帧使用，可获得分簇的DFT-S-OFDM和N×SC-FDMA系统在自适应传输时频谱效率的联合性能。仿真结果表明，与单一自适应系统相比，该方法在多径信道下的吞吐量性能能够取得1 dB增益。

关键词: 离散傅里叶变换扩频的正交频分复用, 单载波频分多址, 信干噪比, 自适应传输, 自适应调制编码, 吞吐量

Abstract: Aiming at the problem that each frame cannot switch the system between DFT-S-OFDM and N×SC-FDMA in real-time adaptive transmission of LTE-A’s uplink, a hybrid Adaptive Modulation and Coding(AMC) method is proposed. According to SINR, the method predicts the throughput of DFT-OFDM and N×SC-FDMA in the situation of adaptive transmission, and chooses the system which has greater throughput and the corresponding MCS for the next frame. This method obtains the hybrid performance of spectrum efficiency of DFT-OFDM and N×SC-FDMA in adaptive transmission. Simulation results show that this method can get 1 dB gain in the aspect of throughput performance, compared with the single adaptive transmission system.

Key words: DFT-Spreading-Orthogonal Frequency Division Multiplexing(DFT-S-OFDM), Single Carrier-Frequency Division Multiple Access (SC-FDMA), Signal to Interference and Noise Ratio(SINR), adaptive transformation, Adaptive Modulation and Coding(AMC), throughput

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