一种信道估计平均长度动态调整的新方法  

A New Scheme for Adjusting the Estimated Average Length of Channel

作　　者：马章勇[1] 赵春明[1] 尤肖虎[1] 

机构地区：[1]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《应用科学学报》2003年第1期49-52,共4页Journal of Applied Sciences

基　　金：国家863资助项目(863-317-03-01-02-04-20/MII-C3G-02-04-002);东大通信技术公司资助项目

摘　　要：提出了利用相干Rake接收机原理,估计出有效到达径的信道估计参数及其包络信号;统计有效到达径包 络信号的电平通过率,并由此估计出信道的多普勒频偏.利用多普勒频偏与最优信道估计平均长度的关系,动态地 调整信道估计平均长度,使整个相干接收机的性能在不同的移动速度下均能获得较好的估计性能.The author proposes that the channel coefficient of the effective arriving path can be estimated with the Rake coherent receiver. By calculating the level cross rate (LCR) of the envelope , the Doppler - shift is estimated. The observation length is then adjusted dynamically with the help of the connection between the Doppler - shift and the optimal observation length, enabling the whole receiver to obtain better performance in variant velocities.

关 键 词：平均长度 动态调整 电平通过率 RAKE接收机 码分多址 多普勒频偏 CDMA 蜂窝移动通信系统 信道估计 

分 类 号：TN929.533[电子电信—通信与信息系统]