迭代接收下高效链路自适应传输方法

发布时间：2018-03-23 12:39

本文选题：迭代接收　切入点：链路自适应　出处：《东南大学学报(自然科学版)》2014年01期

【摘要】：针对3GPP LTE下行传输链路,研究迭代接收情况下的高效链路自适应(LA,Link Adaptation)方法.首先,给出迭代接收后验信干比及等效信噪比的计算方法;然后,利用传统LA方法确定秩指示和信道质量指示的取值范围;接着,提出高效LA方法,该方法仅在秩指示和信道质量指示的范围内确定反馈参数,减少了后验信干比及等效信噪比的计算次数,从而降低了在线吞吐量预测的计算量;最后,仿真结果表明,所提LA方法的吞吐量优于传统LA方法,满足链路服务质量并且获得了3.5 dB吞吐量增益.
[Abstract]:For the downlink of 3GPP LTE, the efficient link adaptive link adaptation method in the case of iterative reception is studied. Firstly, the method of calculating the posterior signal-to-interference ratio and the equivalent signal-to-noise ratio of iterative reception is given. The traditional LA method is used to determine the range of values of rank indication and channel quality indication. Then, an efficient LA method is proposed, which determines the feedback parameters only within the range of rank indication and channel quality indication. The computation times of posterior signal-to-interference ratio and equivalent signal-to-noise ratio are reduced, and the calculation amount of on-line throughput prediction is reduced. Finally, the simulation results show that the throughput of the proposed LA method is better than that of the traditional LA method. Meet the link quality of service and gain 3.5 dB throughput gain.
【作者单位】：东南大学国家移动通信重点实验室;
【基金】：国家自然科学基金资助项目(60925004,61201171) 国家高技术研究发展计划(863计划)资助项目(2012AA01A506) 中国博士后科学基金资助项目(2012M511174)
【分类号】：TN929.5

【共引文献】