Open AccessNovel partial correlation method algorithm for acquisition of GNSS tiered signals
Author(s) -
Svatoň Jiří,
Vejražka František,
Kubalík Pavel,
Schmidt Jan,
Borecký Jaroslav
Publication year - 2020
Publication title -
navigation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.847
H-Index - 46
eISSN - 2161-4296
pISSN - 0028-1522
DOI - 10.1002/navi.390
Subject(s) - binary offset carrier modulation , gnss applications , computer science , algorithm , fast fourier transform , block (permutation group theory) , signal (programming language) , global positioning system , bit error rate , mathematics , telecommunications , decoding methods , geometry , quadrature amplitude modulation , programming language
This paper presents a new modified Single Block Zero‐Padding (mSBZP) Partial Correlation Method (PCM) Parallel Code Search (PCS) algorithm for effective acquisition of weak GNSS tiered signal using coherent processing of its secondary code (SC) component. Two problems are discussed: acquisition of primary codes with a longer period using FFT blocks of limited length, and the utilization of PCS in the presence of SC bit transition. The PCM and SC bit transition forms parasitic fragments in the Cross‐Ambiguity‐Function (CAF) to devaluate signal detection performance. A novel analysis of this mechanism and its impact is presented. A novel mSBZP‐PCM‐PCS algorithm is proposed, which does not degrade the CAF. Then, the algorithm is combined with SC bit transition removal schema and sequential search to construct an estimator for weak tiered signal acquisition. The performance of the method is demonstrated by analysis and computer simulation using Galileo E1C and GPS L1C‐P signals.