国防科技大学学报2017，Vol.39Issue(3)：41-46,6.DOI:10.11887/j.cn.201703007
采用副载波参考波形方法的GNSS双载波环多径抑制技术
Multipath mitigation technique of GNSS double phase estimator using subcarrier reference waveform method
摘要
Abstract
In order to achieve the unambiguous and anti-multipath reception of the BOC (binary offset carrier) signal,the DPE (double phase estimator) was modified by introducing a strobe waveform in the prompt signal correlation process of the SPLL (subcarrier phase lock loop) integration.The modified DPE possesses multipath error mitigation performance and employs no additional correlator.The theory and the realization of the proposed approach were explained and analyzed,and the performance of the modified DPE was characterized according to the SMEE (subcarrier multipath error envelope) and the tracking jitter.Simulation results show that,compared with the conventional DPE,the proposed algorithm can provide a reduction in the SMEE area of 81.1％ for signal BOC (1,1) and 75.1％ for signal BOC (14,2).However,the modified DPE experiences a loss of-6 dB in terms of the post-coherent signal-to-noise ratio,which impacts its tracking precision.Thus,the selection of waveform parameters involves a trade-off between the tracking performances obtained under multipath and thermal noise conditions.Above all,the proposed method is applicable to the receiving problems of multipath environnent or non weak signal case.关键词
高阶二进制偏移载波信号/双环路/双载波环路/副载波多径误差包络/载波多径Key words
high-order binary offset carrier signal/double estimator/double phase estimator/subcarrier multipath error envelope/phase multipath分类
信息技术与安全科学引用本文复制引用
徐成涛,唐小妹,黄仰博,陈华明,王飞雪..采用副载波参考波形方法的GNSS双载波环多径抑制技术[J].国防科技大学学报,2017,39(3):41-46,6.基金项目
国家自然科学基金资助项目(41272385) （41272385）
新世纪优秀人才支持计划资助项目(NECT-11-0317) （NECT-11-0317）
