摘要
WCDMA作为成熟的移动通信技术衍生出多种类似的通信系统。为改善低信噪比及大频偏环境下的系统时隙同步性能。分析基于传统分段非相干累加方法在该环境下的应用局限性,使用一种基于频偏补偿与时隙同步相结合的增强时隙同步算法,仿真证明该算法可以有效提高系统的时隙同步性能。并提出基于变补偿频率步长与相干累加时隙长度相结合的频偏精补偿方案,仿真证明在低信噪比下可快速使频偏范围收敛至6 Hz以内。对实际空口采集数据进行处理,验证完成了小区搜索的过程。
As a mature mobile communication technology,WCDMA derived a variety of similar communication systems. In order to improve the performance of time slot synchronization under the environment of low signal-to-noise ratio and large deviation,the limitations of the application of the methods is analyzed based on piece-wise non-coherent accumulation. An enhanced algorithm slot synchronization algorithm is applied based on frequency compensation combined with slot synchronization,simulation shows that this algorithm can effectively improve the slot synchronization performance of the system,and put forward a scheme based on variable compensation frequency step size combined with variable length of coherent accumulation slot,which can make fast convergence to 6 Hz frequency offset range.Under the low signal-to-noise ratio,it succeeds to deal with the process of cell search of the actual air interface data.
作者
余景盼
万国金
冷若兰
虞贵财
YU Jingpan, WAN Guojin , LENG Ruolan, YU Guicai(Department of Electronic Information Engineering,Nanchang University,Nanchang 330031, China)
出处
《电子器件》
CAS
北大核心
2017年第5期1167-1172,共6页
Chinese Journal of Electron Devices
基金
国家自然科学基金项目(61661030)
关键词
WCDMA
小区搜索
频偏补偿
时隙同步
匹配滤波
WCDMA
cell searching
frequency offset compensation
slot synchronization
matched filtering
