摘要
TD-SCDMA系统采用了智能天线和联合检测技术,通常情况下,系统是码道受限的,具有很高的频谱效率。但是,由于TD-SCDMA系统上下行时分占用1.6MHz带宽,仅为WCDMA系统上下行带宽10MHz的1/6,所以,尽管TD-SCDMA系统频谱利用率较高,但TD-SCDMA系统单载波容量有限。TD-SCDMA多载波系统解决了这个问题,大大提高了TD-SCDMA单基站的容量和接纳能力。本文从3个方面分析了多载波方案的好处,并给出了系统仿真结果。
With the new technology of smart antenna and joint detection, TD-SCDMA is a channel limited system in common scenarious. And the frequency efficiency of TD-SCDMA is very high. But, the frequency bandwidth is only 1.6MHz for time divided duplex, only 1/6 of WCDMA system. So, the capacity of single carrier TD-SCDMA system is low in despite of it＇s high frequency efficiency. Multicarrier TD-SCDMA solutions enhance the capacity of single cite greatly. This thesis ananysis the benefits of multicarrier solutions from 3 aspects. And some system simulation results are given at the last.
出处
《电信工程技术与标准化》
2006年第4期67-71,共5页
Telecom Engineering Technics and Standardization
