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[ "段红光(1969−),男,重庆邮电大学通信与信息工程学院硕士生导师、正高级工程师,主要研究方向为移动通信协议栈。" ]
[ "胡利(1990−),女,重庆邮电大学通信与信息工程学院硕士生,主要研究方向为基于CSI-RS的信道状态信息测量。" ]
[ "田枚(1991−),女,重庆邮电大学通信与信息工程学院硕士生,主要研究方向为同频干扰下的信道估计。" ]
网络出版日期:2017-07,
纸质出版日期:2017-07-20
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段红光, 胡利, 田枚. LTE-Advanced系统中的自适应调制技术[J]. 电信科学, 2017,33(7):88-93.
Hongguang DUAN, Li HU, Mei TIAN. Adaptive modulation technology in LTE-Advanced system[J]. Telecommunications science, 2017, 33(7): 88-93.
段红光, 胡利, 田枚. LTE-Advanced系统中的自适应调制技术[J]. 电信科学, 2017,33(7):88-93. DOI: 10.11959/j.issn.1000−0801.2017120.
Hongguang DUAN, Li HU, Mei TIAN. Adaptive modulation technology in LTE-Advanced system[J]. Telecommunications science, 2017, 33(7): 88-93. DOI: 10.11959/j.issn.1000−0801.2017120.
自适应调制技术是 LTE-Advanced 系统自适应调制编码(AMC)技术的一项重要研究内容。根据均方误差函数的下凸性,在不同信道模型下,通过迭代算法校正得到新型MCS等级(包含256QAM高阶调制)的通用β值,并与传统MCS等级进行性能对比。仿真结果显示,新型MCS等级在高信噪比时提供的系统吞吐量更高,且优化后的β值使CQI估计更准确。
Adaptive modulation technology is an important research content of AMC technology in LTE-Advanced system.The β value of new MCS levels were studied
in which the higher order modulation 256QAM was used
then the general β value of new MCS levels by the iterative algorithm in several different channel models were obtained
according to the convexity of the mean square error function
and compared with the traditional MCS levels.The simulation results show that the new MCS levels provide higher system performance when SNR is high
and the optimized β value makes CQI calculation more accurately.
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