@article{,
    author = {Yang, Chun; Pany, Thomas; Soloviev, Andrey},
    title = {An Implementation of Variable IF Tracking Loop (VITAL) and Initial Test Results},
    editor = {},
    booktitle = {},
    series = {},
    journal = {Navigation},
    address = {},
    publisher = {},
    edition = {},
    year = {2017},
    isbn = {},
    volume = {},
    number =  {},
    pages = {},
    url = {},
    doi = {10.1002/navi.212 },
    keywords = {},
    abstract = {Correlation at an intermediate frequency (IF) produces a composite correlation function of an envelope being that of the underlying code and an internal structure being that of the IF carrier. By varying the IF, one can introduce zero-crossings to the envelope so as to shape and sharpen the main peak. Such a variable peak is desired for accurate timing of the direct signal while isolating close-in multipath and spoofing signals. The functionality of variable IF correlation in acquisition and its multipath performance are analyzed in a recent paper published in this journal. In this paper, the details of an implementation of variable IF tracking loop are presented with a theoretical background analysis. A publically available open-source software GPS receiver (SoftGNSS V3.0) is modified into variable IF tracking loop and tested on real-world GPS C/A-code signals. The preliminary test results demonstrate increased code tracking accuracy as well as increased positioning performance. },
    note = {},
    institution = {Universität der Bundeswehr München, Fakultät für Luft- und Raumfahrttechnik, LRT 9 - Institut für Raumfahrttechnik und Weltraumnutzung, Professur: Pany, Thomas},
    
    
}