| 摘要: |
| 针对目前LTE小区搜索算法比较复杂的问题，根据信号的时频对称特性，提出了时域
和变换域联合估计的简化方法。没有增加额外的测度函数，分三步实现LTE小区准确搜索，
即时域实现半帧定时和分数倍频偏估计，频域获取整数倍频偏估计和半帧细定时，混合检测
实现帧定时，同时根据同步码的检测获取小区ID。与以往算法相比，所提算法降低了LTE小
区搜索的复杂度。仿真结果证明，信噪比在-10～2 dB之间时该算法的性能有一定提高，
对于实现终端快速准确的小区搜索有一定的应用价值。 |
| 关键词: 宽带接入；LTE小区搜索；变换域；联合估计 混合检测 |
| DOI：10.3969/j.issn.1001-893X. |
|
| 基金项目: |
|
| A Simplified LTE Cell Search Algorithm Based on Transform-Domain |
| LIU Na-na,ZHAO Xin-jian |
| (College of Information Engineering,Zhejiang University of Technology，Hangzhou
310023，China) |
| Abstract: |
| To solve the problem of complexity for LTE cell search, a low complexi
ty co-algorithm is proposed in both time and frequency domain,based on the sym
metry properties of the signal. Instead of extra metric function,it is realize
d only by three steps to search the LTE cell accurately.In step1 the ha
lf frame is timed and the fractional frequency offset is estimated in time domai
n.In step2 the integer frequency offset and the fine-half frame
timing is estimated in freque
ncy domain.In step3 the frame is timed by the method of hybrid detection. Cel
l ID is also indentified by the synchronization code in the process. The algori
thm can reduce the complexity of LTE cell search. The simulation results confir
m that the performance of the algorithm is improved with the -10dB
|
| Key words: wideband access LTE cell search transform-domain joint estimation hybrid detection |
《电讯技术》编辑部 