Navigation Data Bit Decoding of Weak GNSS Signal

被引：0
|
作者：
Zhang, Hailong [1 ]
Liu, Xuan [1 ]
机构：
[1] China Elect Power Res Inst, Metering Dept, Beijing, Peoples R China
来源：
2018 IEEE INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING, COMMUNICATIONS AND COMPUTING (ICSPCC) | 2018年
关键词：
GNSS receiver; Weak signal; GPS/BDS; High sensitivity; Extended coherent integration; Bit decoding;
D O I：
暂无
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
The predominant technique to improve the receiver's sensitivity is extending integration time coherently. However, data modulation limits the integration time, which is up to data bit period. Maximum likelihood(ML) estimation method is a common way to estimate the data bits. But the ML algorithm is sensitive to Doppler error and has heavy computation load, which depend on the decoding block length. In this paper, a differential detection method is proposed for data bit decoding. Differential decoding has merit of low computation complexity and fitting for long integration time. The simulation results show the robustness to Doppler error of differential decoding algorithm.
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收藏
页数：5
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