| 摘要: |
| 为了在链路自适应、混合自动重传、快速调度过程中最大程度地满足长期演进(LTE)
系统的性能和吞吐量，提出了一种新型的信噪比(SNR)和信道质量指示(CQI)映射方案。这种
新的方案通过系统链路级仿真得到信噪比和误块率之间的仿真曲线，然后通过区域拟合的方
式得到SNR和CQI之间的关系。和传统的映射方案相比，它不仅易于实现和存储而且具有很好
的自适应能力。结合仿真曲线可以看出这种新型的方案能够满足协议规定误块率和吞吐量的
要求。该方案已应用于TD-LTE无线综合测试仪表的开发中。 |
| 关键词: 长期演进；链路自适应 信噪比 信道质量指示 TD-LTE；综合
测试仪表 |
| DOI： |
|
| 基金项目:国家科技重大专项资助项目(2009ZX03002-009) |
|
| A Novel SNR and CQI Mapping Scheme Based on TD-LTE Systems |
| CHEN Fa-tang,YOU Jie,CHU Yang |
| (Chongqing Key Lab of Mobile Communications, Chongqing University of Posts and
Telecommunications, Chongqing 400065, China) |
| Abstract: |
| In order to satisfy the performance and throughput extremely in the pr
ocess of link adaptive,hybrid automatic repeat request(HARQ) and fast scheduli
ng in LTE（Long Term Evolution） system, this paper proposes a new mapping schem
e of Signal to Noise Ratio(SNR) and Channel Quality Indicator(CQI). This
new scheme gets the simulated curve between SNR and block error rate(BER) t
hrough the link simulation system, then get the relationship between SNR and CQI
through regional fitting. Compared with traditional mapping scheme, it is easie
r to implement and store, and has good adaptive capacity. The simulation curve o
f
this new scheme shows that it can meet the requirement of throughput and BER ru
led in specification. This new scheme has already been used in TD-LTE wireless i
ntegrated test instrument development. |
| Key words: LTE link adaptive signal to noise ratio channel
quality Indicator TD-LTE integrated test instrument |
《电讯技术》编辑部 