AltBOC and CBOC Correlation Functions for GNSS Signal Synchronization
ICCSA '09 Proceedings of the International Conference on Computational Science and Its Applications: Part II
Cramér–Rao bound analysis of positioning approaches in GNSS receivers
IEEE Transactions on Signal Processing
GPS multipath mitigation for urban area using omnidirectional infrared camera
IEEE Transactions on Intelligent Transportation Systems
A novel unambiguous BOC signal synchronization scheme for global navigation satellite systems
CIIT '07 The Sixth IASTED International Conference on Communications, Internet, and Information Technology
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We address the problem of GPS signal delay estimation in a multipath environment with a low-complexity constraint. After recalling the usual early-late estimator and its bias in a multipath propagation context, we study the maximum-likelihood estimator (MLE) based on a signal model including the parametric contribution of reflected components. It results in an efficient algorithm using the existing architecture, which is also very simple and cheap to implement. Simulations show that the results of the proposed algorithm, in a multipath environment, are similar to these of the early-late in a single-path environment. The performance are further characterized, for both MLEs (based on the single-path and multipath propagation) in terms of bias and standard deviation. The expressions of the corresponding Cramer-Rao (CR) bounds are derived in both cases to show the good performance of the estimators when unbiased