TD-LTE系统中新型SNR和CQI映射方法  

Novel SNR and CQI Mapping Method in TD-LTE System

作　　者：谢灿 任旭 

机构地区：[1]重庆重邮信科设计有限公司,重庆400065

出　　处：《电视技术》2013年第17期209-212,共4页Video Engineering

基　　金：国家科技重大专项(2009ZX03002-009)

摘　　要：链路自适应技术是长期演进(LTE)系统中的一项重要技术,自适应调制编码可以增强通信的可靠性和提高频谱利用率。提出一种新型的信噪比(SNR)和信道质量指示(CQI)映射方法,一方面,通过优化尺度因子降低了互信息有效信噪比映射的复杂度,另一方面对每一个CQI值算出对应的传输块大小并进行链路级仿真得到一条SNR和误块率(BLER)的曲线图,由仿真曲线可知,此方案既降低了实现映射的复杂度,又提高了映射的准确性,且该方案已经应用于TD-LTE无线综合测试仪表的开发中。Link adaptive is a significant technology in LTE （Long Term Evolution）. AMC （Adaptive Modulation and Coding） technology can ensure the security of telecommunication and increase the spectrum utilization. A novel SNR and CQI mapping scheme is proposed in this paper. On the one hand, the complexity of MI-ESM （Mutual Information-Efficient SNR Mapping） is lower by optimizing scale gene, and on the other hand, the size of transport block correspond to each CQI is calculated and the simulated curve of SNR-BLER is got through link simulation system. According to the simulation curves, it is known that this scheme not only reduces the complexity but also increases the veracity, and this new method has already been used in TD-LTE wireless integrated test instrument development.

关 键 词：长期演进 信噪比 信道质量指示 有效信噪比映射 

分 类 号：TN929.5[电子电信—通信与信息系统]