TD-SCDMA长期演进方案中帧结构参数的改进

第三代移动通信系统性能的增强和长期演进已成为目前的研究执点，这种长期演进系统不仅要求性能上的增强，而且还必须考虑与已有3G系统共存的问题，CATT等公司共同提出的对TDSCDMA系统演进的帧结构参数备受人们关注。给出了一种新的基于OFDM技术的演进的TDD系统帧结构参数，能满足与已有3G系统共存的要求，并且有更大的吞吐量和频谱效率。仿真表明，新参数在短CP时性能优于CATT的参数，而在使用长CP时，2组参数的性能几乎是一致的。

Improvement of frame structure parameters for the long-term evolution project of TD SCDMA

Nowadays, many people have already put their eyes on how to buildup and evolve the third generation of the mobile communication system. LTE systems not only requires enhancing performance, but also have to take other important aspects into consideration, such as coexistence on adjacent channels with existing 3G systems. Now the frame structure parameters to buildup and evolve TD SCDMA system, which is presented by CATT, receive much attention. Based on the parameters, this paper presents a new frame structure of evolved TDD system based on OFDM, which can meet the requirement of coexistence with existing 3G systems and has more throughput and frequency efficiency. The simulation shows that with short CP the new parameters performance excels the parameters of CATT and with long CP the performance of these two parameters are almost equal.