Multipath-Resistant Time of Arrival Estimation for Satellite Positioning

Bischoff, Renke; Häb‐Umbach, Reinhold; Ramesh, Nammi Sai

doi:10.1078/1434-8411-54100200

Cited by 9 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the multipath suppression antenna can only reject multipath signals impinging from a lower elevation angle, not from all the angles, which may omit some multi-path interfere. Another kind of method is based on the discriminator function shaping, such as the narrow correlator (NC) [3] technique andthe strobe correlator (SC) [4] technique. These techniques improve tracking precision by reduce the correlator spacing between reference sequences, which yield an performance increasement by even 90%.…”

Section: Introductionmentioning

confidence: 99%

A Short-Delay Multipath Mitigation Algorithm Based on Variable Step-Size LMS Adaptive Filtering

hui

Zhao

et al. 2014

AMM

View full text Add to dashboard Cite

The multipath in the inter-spacecraft microwave ranging system is the short-delay multipath generally. The performance of existing multipath mitigation algorithms degrade in the short-delay scenario, and therefore an adaptive filtering algorithm based on variable step-size LMS is exploited for estimating the parameters of multipath signals. Firstly, the equation of variable step-size LMS is deduced. Then, the signals parameters are estimated recursively though the adaptive filtering algorithm. Multipath elimination is performed by substracting the estimated multipath effects from the measured correlation function. Simulation results validate that the proposed method is superior to the existing algorithms in the aspect of convergence rate and ranging accuracy for the short delay multipath. Therefore, it is a viable solution for achieving high accuracies measurements in microwave ranging system with short-delay multipath.

show abstract

Section: Introductionmentioning

confidence: 99%

A Short-Delay Multipath Mitigation Algorithm Based on Variable Step-Size LMS Adaptive Filtering

hui

Zhao

et al. 2014

AMM

View full text Add to dashboard Cite

show abstract

“…There have also been numerous studies of non-parametric methods, such as the Teager-Kaiser algorithm (de Castro et al, 2007), as well as the narrow correlator (van Dierendonck et al, 1992), strobe correlator scheme (Garin et al, 1996), gated and high-resolution correlator (McGraw and Braasch, 1999), early late slope techniques and multipath elimination technology (MET) (Jones et al, 2004) and crosscorrelation function (CCF) analysis (Bischoff et al, 2004). The narrow correlator is very well known, and the high-resolution correlator (HRC), which is an approximate of the gated correlator method, is known for its very good performance with middelayed multipath.…”

Section: Introductionmentioning

confidence: 99%

Modified High-Resolution Correlator Technique for Short-Delayed Multipath Mitigation

Kim

Lee

et al. 2009

J. Navigation

View full text Add to dashboard Cite

Multipath is one of the main error sources in global navigation satellite system (GNSS) positioning. The high-resolution correlator (HRC) is a multipath mitigation technique well known for its outstanding performance for mid-delayed multipath, but still has a remaining error for the short-delayed multipath. This paper proposes a modified HRC scheme that can remove or reduce the error for short-delayed multipath signals. It estimates the HRC tracking error and augments the conventional HRC with the estimates. The method was implemented with a software receiver and the test results show short-delayed multipath-induced errors were reduced to about one third of those from the conventional HRC.

show abstract

“…Because the corresponding hardware is very complicated and the amount of calculation is large, MEDLL's real-time is very poor, and it is only suitable for static and relatively slow occasions where multipath interference happened. In paper [7], a multipath error estimation method which is based on analysis of discriminative curve slope is proposed. This method requires a relatively low hardware, compared with a less amount of calculation, and a better timeliness.…”

mentioning

confidence: 99%

Low complexity technology for multipath elimination in spread spectrum system

Tang

Zhao

Zhang

2009

2009 International Conference on Mechatronics and Automation

View full text Add to dashboard Cite

The multipath estimation delay locked loop was researched and improved through the limited points estimation method in the paper. In this paper, the structure chart of the PN code tracking loop was introduced, and the mathematics model of the signal tracking system in multipath environment was also presented. When only one multipath signal was considered, its influence to the loop discriminative character was obtained. The multipath estimation delay locked loop was introduced in this paper. In order to keep the loop stabilization zero point invariable, we introduced the zero-point fixed multipath estimation delay locked 10op(ZFMEDLL). Further more, the stabilization phase error performance, noise performance and realization complexity of ZFMEDLL compared to conventional DLL, narrow-related DLL and MEDLL were presented. The simulation result showed that the ZFMEDLL had a great improvement on the capability of multipath elimination compared to MEDLL.

show abstract

Multipath-Resistant Time of Arrival Estimation for Satellite Positioning

Cited by 9 publications

References 6 publications

A Short-Delay Multipath Mitigation Algorithm Based on Variable Step-Size LMS Adaptive Filtering

A Short-Delay Multipath Mitigation Algorithm Based on Variable Step-Size LMS Adaptive Filtering

Modified High-Resolution Correlator Technique for Short-Delayed Multipath Mitigation

Low complexity technology for multipath elimination in spread spectrum system

Contact Info

Product

Resources

About