Turbo MUD技术在TD-SCDMA系统中的应用

TD-SCDMA已成为第3代移动通信国际标准之一,它采用联合检测技术来抑制符号间干扰(ISI)和多址干扰(MAI)。介绍了Turbo多用户检测(MUD)技术在TD-SCDMA系统中的应用,该技术将Turbo迭代译码思想引入到联合检测,有机结合多用户检测和信道译码2种技术,通过在软MUD和软信道译码间多次进行迭代并及时交换软信息(如后验概率)来提高系统性能。研究表明,采用TurboMUD可使系统性能显著提高。

Application of Turbo MUD technique in TD- SCDMA

TD-SCDMA has become one of the third-generation mobile telecommunication international standards, which uses joint detection technique to suppress the intersymbol interference (ISI) and multi-access interference (MAI). In this paper we introduce Turbo multiuser detection technology into TD-SCDMA. It applies Turbo principle of iteration to joint detection and make MUD technique combine with channel decoding technique, which improves the system performance by intermediate exchanges of soft information (i.e., posterior probabilities) between soft MUD and soft channel decoding. The study shows that Turbo MUD can remarkably improve the system performance.