摘要
在低信噪比环境下,扩频伪码捕获算法直接影响接收系统的整体性能。在分析扩频伪码捕获算法在低信噪比环境下的特性的基础上,针对均值算法中由于码相位偏移量的不同而导致的相关性能不稳定的问题,采用预处理方法对均值算法进行改进。仿真分析和结果数据表明,在低信噪比条件下的实际应用中,选用改进的均值算法可以有效地提高捕获过程中相关性能的稳定性从而提高捕获性能。
The acquisition algorithm of spread spectrum code has a direct impact on the overall system performance of receiving system in the environment with low signal to noise ratio.On the basis of analysis on the characteristics of spread spectrum code acquisition algorithm in the environment with low signal to noise ratio,aimming at the problem that the correlation performance is not stabile because of the different phase offset,a pretreatment method is used to improve the average algorithm.Simulation analysis and results show that the improved average algorithm can effectively improve the stability of the correlation performance in the acquisition process and improve the performance of acquisition in the actual application with negative signal to noise ratio.
出处
《火力与指挥控制》
CSCD
北大核心
2010年第5期32-35,共4页
Fire Control & Command Control
基金
国家自然科学基金资助项目(60802031)
关键词
均值法
捕获
低信噪比
扩频码
average method
acquisition
low signal to noise ratio
spread spectrum code
