摘要
主要介绍了一种在GNSS信号中抑制多径信号的鉴相方法,接收机接收到的GNSS信号中往往包含多径信号,GNSS信号进行下变频生成中频信号后,进行模数转换;将经过模数转换后的GNSS信号进行载波剥离,得到I路和Q路的信号,在码跟踪环路中,对I路和Q路信号进行码剥离,得到多径信号的互相关功率后,采用基于精密TK采样间隔的TK-EML5鉴相方法,能够起到有效地抑制多径信号的效果。
A discriminate method which can restrain multipath signals in the GNSS is de- scribed. The received GNSS signals often contain multipath signals. After down-conversion to the IF signal, analog GNSS signals are converted to digital signals. Then After stripping the carrier signals, the digital GNSS signals can be disposed to receive channel I and channel Q signals. After code stripping the I and Q signals, the corss-correlation power of the mul- tipath signals can be received in the code tracking loop. TK-EML5 multipath signals based on the precision TK sampling interval is taken, and it can make effectives in inhibit the mul- tipath signals.
出处
《全球定位系统》
2012年第6期5-8,16,共5页
Gnss World of China
基金
国家863计划项目(批准号:2011AA(20502)
国家自然科学基金项目(批准号:61171070)资助课题
关键词
GNSS
多径信号抑制
鉴相方法
GNSS~ multipath signals inhibition
a discriminate method
