TD-LTE系统CQI反馈中一种有效的信噪比链路到系统映射方法

2011 IEEE 2nd International Conference on Computing, Control and Industrial Engineering Pub Date : 2011-09-01 DOI:10.1109/CCIENG.2011.6008103

Xiaowen Li, Qianjun Fang, Liuwei Shi

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引用次数: 32

摘要

本文概述了用于TD-LTE(时分-长期演进)系统级仿真的所谓链路性能模型，该模型用于确定降低用户设备复杂性的链路CQI(信道质量指标)。有效信噪比方法主要包括EESM和MIESM，考虑到瞬时信道实现等配置，利用后处理信噪比计算有效信噪比。然后，UE根据从有效信噪比到相应CQI值的线性映射函数报告CQI值。仿真结果表明，与理想的CQI选择相比，EESM和MIESM算法的吞吐量性能相近，但EESM方法的映射函数比MIESM方法简单。此外，EESM方法要求所有子载波应用相同的MCS，这适用于TD-LTE系统。因此，TD-LTE无线综合测试仪采用EESM方法来实现有效的信噪比链路到系统映射。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A effective SINR link to system mapping method for CQI feedback in TD-LTE system

This paper gives an overview of the so-called link performance model used in TD-LTE (Time Division-Long Term Evolution) system level simulations to determine the link CQI (channel quality Indicator) at reduced complexity of UE (User Equipment). Mainly, effective SINR methods including EESM and MIESM account for the instantaneous channel realization and other configurations and utilize the post processing SINR to compute the effective SNR (Signal to Noise Ratio). Then UE reports CQI values, depending on a linear mapping function from effective SNR to a corresponding CQI value. The simulation shows that EESM and MIESM algorithms bring a similar throughput performance comparing to the ideal CQI choice, but mapping function of EESM method is simpler than MIESM method. Also, EESM method requires all subcarriers to apply the same MCS, which is suitable for TD-LTE system. Therefore, TD-LTE wireless integrated testing instrument adopts EESM method to realize effective SINR link to system mapping.

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2011 IEEE 2nd International Conference on Computing, Control and Industrial Engineering

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