基于差分检波的伪码信号分段相关-视频积累方法  

Segment correlation-video integration method for pseudo-random noise codes using differential detection

作　　者：宋成[1] 黄跃伟[1] 王飞雪[1] 

机构地区：[1]国防科技大学电子科学与工程学院卫星导航研发中心,湖南长沙410073

出　　处：《系统工程与电子技术》2009年第7期1547-1552,共6页Systems Engineering and Electronics

基　　金：新世纪优秀人才支持计划资助课题(NECT-04-0995)

摘　　要：分析了载波多普勒下基于差分检波的伪码信号分段相关-视频积累检测方法,从数学上严格推导了该方法的统计性能,给出了处理损耗公式。采用最大处理损耗最小化准则,分析了总积累时间给定和检测性能指标给定两种情况下最优中频积累时间的计算方法和变化规律。经比较表明,差分检波器比平方律检波器更适合于大多普勒和低信噪比条件。The segment correlation-video integration method for pseudo-random noise code signals using differential detection under carrier Doppler is studied. The statistic performance for this method is derived in mathematics, and the formula of detection loss is analyzed. Using the criterion of minimizing the maximum of detection loss, the method for both cases with a given total integration time and the given detection performance （detection and false alarm probabilities） is optimally designed. Compared with the square-law detection, the differential detection is preferable to the square-law detection at the high carrier Doppler and low signal-to-noise ratio.

关 键 词：伪码信号 差分检波 中频积累 视频积累 

分 类 号：TN914.42[电子电信—通信与信息系统]