摘要
该文首先基于TD-SCDMA介绍了下行链路的功率比检测帧预同步,然后研究同步算法的定点实现中门限再量化以及输出数据截断对算法性能的影响,找出了门限的最佳数值和最小量化字长。考虑到TD-SCDMA和第四代移动通信标准TD-LTE的帧结构是相容的,故该文研究结果可以扩展到TD-LTE技术的应用中。MATLAB仿真结果表明,通过此方法的功率比量化门限处理及输出数据截断,文献3的功率比检测下行同步算法可以极大地降低复杂度和运算量,且在较大信噪比动态范围内仍具有良好的同步性能。
This paper introduces the initial frame synchronization of power ratio detection system based on TD-SCDMA special frame structure,and studies the influence of threshold quantized and output data truncation to the algorithm performance in the fixed-point implementation of the synchronous algorithm.Finally,many studies have been done to find out the optimal value of threshold and minimize quantitative word length.TD-SCDMA and TD-LTE have similar frame structures,so the results of this study can apply to TD-LTE.The results of MATLAB simulation show that the downlink synchronization algorithm in [3] not only greatly reduces the computation complexity,but also has good downlink synchronization positioning performance in larger SNR dynamic range by using this method.
出处
《杭州电子科技大学学报（自然科学版）》
2011年第5期58-62,共5页
Journal of Hangzhou Dianzi University：Natural Sciences
基金
浙江省自然科学基金资助项目(Y1090645)
关键词
帧同步
功率比检测
量化字长
截断
synchronization
power ratio detection
quantify word length
truncation
