Low-complexity code tracking loop with multipath diversity for GNSS over multipath fading channels

Wu, Yating; Zhu, Yuesheng; Leung, S.H.; Wong, W.K.; Wang, Tao

doi:10.1016/j.actaastro.2015.05.037

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…Because the radio signal is affected by distance, terrain and obstacles, the signal characteristics caused by multipath fading have strong correlations with their location information [28], [29]. In each grid, the SCell and the 3 optimal measured data of NCells are selected to obtain 4 groups of PCI, RSRP and RSRQ sampling values, namely, (PCI i,m , RSRP i,m , RSRQ i,m ), which constitute a fingerprint, m = 1, 2, 3, 4.…”

Section: Positioning Algorithm For the Twice-fuzzy Clustering Finmentioning

confidence: 99%

Positioning Algorithm Based on the Fingerprint Database by Twice-Fuzzy Clustering in the High-Speed Railway Scenario

Duan

Xie

et al. 2020

IEEE Access

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When the wireless communication network is optimized for the high-speed railway scenario (HSRS), GPS connections are prone to frequent interruptions. The causes of this phenomenon are analyzed after collecting a large quantity of measured data. A positioning algorithm based on the fingerprint database by twice-fuzzy clustering is proposed to obtain the locations of the terminal inside the carriage of high-speed train (HST) in real time. After collecting more than 300,000 sampled data of both network characteristics and location information, the database of original fingerprints has been constructed. The identification and elimination of abnormal fingerprints are helpful to improve the quality of the fingerprint database. The longitude and latitude of the terminal, which is losing the signals of GPS, can be calculated by setting the fingerprint integral counter, threshold value and weighted measurement eigenvalues and by constructing a matrix of dissimilarity. The experimental results show that the proportion of similar fingerprints between 15 and 200 by once-fuzzy clustering is as high as 90.81%; Additionally, the number of over 95.57% of the similar fingerprints is between 1-20 by twice-fuzzy clustering. The proportion of samples with positioning accuracy less than 10 m is 63.33%, and those less than 5 m account for 41.67%. The average positioning accuracy of the proposed algorithm is 9.02 m, which is suitable for acquiring location information when the signals of GPS are losing in HSRS.

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Section: Positioning Algorithm For the Twice-fuzzy Clustering Finmentioning

confidence: 99%

Positioning Algorithm Based on the Fingerprint Database by Twice-Fuzzy Clustering in the High-Speed Railway Scenario

Duan

Xie

et al. 2020

IEEE Access

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A new nonlinear Type3-PLL with noise rejection and fast locking performance in tracking telemetry and command systems

Zhu

Shi

et al. 2019

Acta Astronautica

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A Joint Frequency-Domain Equalization (Fde) and Antenna Diversity Combining Method for the Multipath Fading in the Frequency-Selective Channel

Wang

et al. 2016

MATEC Web of Conferences

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Abstract. In this study, a theoretical foundation is built to evaluate the downlink performance of an MC-CDMA cellular system with site diversity operation with and receive antenna diversity combining. An expression for the theoretical conditional bit error rate (BER) for the given set of channel gains is derived based on Gaussian approximation of the interference components in the composite receive signal. The local average BER is then obtained by averaging the conditional BER over the given set of channel gains using Monte-Carlo numerical method. The outage probability is measured from the numerically obtained cumulative distribution of the local average BER to determine the downlink capacity. Results from theoretical computation are compared to the results from computer simulation and discussed.

show abstract

Low-complexity code tracking loop with multipath diversity for GNSS over multipath fading channels

Cited by 3 publications

References 27 publications

Positioning Algorithm Based on the Fingerprint Database by Twice-Fuzzy Clustering in the High-Speed Railway Scenario

Positioning Algorithm Based on the Fingerprint Database by Twice-Fuzzy Clustering in the High-Speed Railway Scenario

A new nonlinear Type3-PLL with noise rejection and fast locking performance in tracking telemetry and command systems

A Joint Frequency-Domain Equalization (Fde) and Antenna Diversity Combining Method for the Multipath Fading in the Frequency-Selective Channel

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