|Abstract:||The GPS C/A civil signal is still the most popular signal in GNSS receivers that service navigation-enabled applications. The signal suffers from limitations due to its design, which preceded the conception of those applications. Altering the transmitted signal is not feasible since that would cause operation disruption in billions of devices. Two of the factors that directly affect the positioning accuracy, especially in multipath environments, are the PRN code length and its chipping rate. This paper proposes a technique that alters the received PRN code to generate a new code with a longer length and an equivalent higher chipping rate. The paper investigates the validity of the proposed technique, provides a mathematical derivation of the auto-correlation function (ACF) of the new code in the presence of multipath signals, and verifies the derivation using real PRN codes. The main objective behind altering the received code is to enhance the positioning accuracy in multipath environments. Therefore, the paper proposes a code tracking algorithm that utilizes the derived ACF function to mitigate multipath by compensating for its effects on the ACF. The results indicate the ability of the proposed tracking algorithm to provide code delay estimation accuracy in multipath environments that approaches the accuracy in the absence of multipath signals.|
Proceedings of the 31st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2018)
September 24 - 28, 2018
Hyatt Regency Miami
|Pages:||4012 - 4026|
|Cite this article:||
Ziedan, Nesreen I., "GNSS Received Code Alteration for Enhanced Accuracy Tracking in Multipath Environments," Proceedings of the 31st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2018), Miami, Florida, September 2018, pp. 4012-4026.
ION Members/Non-Members: 1 Download Credit