Open AccessEfficient technique for DLL S ‐curve side zero‐crossings cancellation in global positioning system/Galileo receiver
Author(s) -
Rouabah Khaled,
Atia Salim,
Flissi Mustapha,
Salim Bouhlel Mohamed,
Mezaache Salaheddine
Publication year - 2019
Publication title -
iet signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.384
H-Index - 42
ISSN - 1751-9683
DOI - 10.1049/iet-spr.2018.5379
Subject(s) - binary offset carrier modulation , gnss applications , pseudorandom noise , discriminator , multipath mitigation , computer science , multipath propagation , algorithm , code (set theory) , autocorrelation , global positioning system , electronic engineering , spread spectrum , code division multiple access , mathematics , telecommunications , detector , engineering , bit error rate , decoding methods , channel (broadcasting) , statistics , set (abstract data type) , quadrature amplitude modulation , programming language
In this study, the authors propose a new method that eliminates ambiguity in global navigation satellite system (GNSS) code acquisition and tracking significantly. It is based on the use of a specified locally generated (SLG) pseudo‐random noise code that can be correlated with any received binary offset carrier sine‐ or cosine‐modulated signal. As a result, the correlation function (CF) together with its discriminator function (DF) at the delay locked loop (DLL) output, determined within a tracking region of (−1, 1) chips, are unambiguous and narrow, providing thus better positioning accuracy. On the other hand, the SLG‐based methods CF and DF are such as those of high‐resolution correlator and Strobe correlator, initially proposed for multipath mitigation in classical binary phase shift keying‐modulated code. In addition, their proposed SLG‐based scheme is valid for any value of the early–late chip spacing in the DLL‐DF. The computer simulation results show that the proposed scheme is unambiguous for DLL code‐tracking operation and has superior performance in the estimation of the delay of line of sight signal in GNSS applications.