摘要
针对含导频GNSS信号捕获问题,通过增加导频通道的相干积分时间,对现有的导频数据通道的组合捕获算法进行了改进,详细分析了改进后的捕获检测量的统计特性。理论分析和仿真实验表明:在信号时频不确定度较小的情况下,该算法的捕获性能相对非相干组合算法有较明显提高,但带来的代价是捕获时间的增加。
To the acquisition of GNSS signals with pilot, by adding coherent time of pilot channel, give an improved acquisition detection and anal tail. The result of theory analysis and lation show, ysis its statistic characteristic in de-when the uncertainly time and fre- quency are small, the improved algorithm is better than non coherent combining algorithm, but the cost is longer acquisition time.
出处
《全球定位系统》
2013年第4期1-6,共6页
Gnss World of China
关键词
导频通道
通道组合
信号捕获
Pilot channel
channel combine
signal acquisition
