Recent advancement in wireless networks and systems has seen the rise of localization techniques as a worthwhile and cost-effective basis for novel services. These location based services (LBSs) have been more and more beneficial and money-making for telecommunications operators and companies. Various LBSs can be offered to the user such as tracking, advertisement, security, and management. Wir...

This study evaluated the positioning accuracy of moving forest harvesters using global navigation satellite system (GNSS) signals under a canopy, and developed approaches for forecasting mature spruce canopy cover. Real-time kinematic with Trimble R12 receiver on top harvester achieved high accuracy, 86% observations meeting maximum precision 8 mm. However, presence cover hampered GNSS’s perfor...

In order to overcome the vulnerability of the global navigation satellite system (GNSS) and provide robust position, navigation and time (PNT) information in marine navigation, the autonomous positioning system based on ranging-mode Automatic Identification System (AIS) is presented in the paper. The principle of the AIS autonomous positioning system (AAPS) is investigated, including the positi...

This article proposes a normalization multi-layer perception (NMLP) geometry classifier to autonomously determine the optimal four femtocell evolved Node Bs (FeNBs), which can use time difference of arrival (TDOA) to measure the location of the macrocell user equipment (MUE) with the lowest GDOP value. The iterative geometry training (IGT) algorithm is designed to obtain the training data for t...

Kinematic carrier phase ambiguity resolution, i.e., on the fly, which is the key to cm-level accuracy differential GPS positioning, is investigated using high precision, single frequency, 10channel, C/A code receivers. The major characteristic of this unit is a narrow correlation spacing which improves code measuring accuracy to 10 cm and reduces code multipath interference. The high code accur...

Autonomous navigation using the GNSS has been increasingly used in lunar exploration missions, as it is considered an efficient method for spacecraft to operate without relying on ground facilities. However, so far, only GPS and Galileo have studied implemented whereas potential of BDS-3 such missions remains largely unexplored. This paper presents analysis evaluation service capabilities at al...

The objective of this work is to compare the performance of three methods of ambiguity resolution: LSAST, LAMBDA, and FASF. To do this evaluation, the methods were implemented in software and data were collected using two dual frequency geodetic quality Trimble R8 GPS receivers in static situation and two Ashtech Z12 GPS receivers in kinematic situation. The data were processed using LSAST, LAM...

As radio frequency (RF) hardware continues to improve, many technologies that were traditionally impractical have suddenly become viable alternatives legacy systems. Two-way ranging (TWR) is often considered a poor positioning solution for airborne and other vehicular navigation systems due its low precision, angular resolution, precise timing requirements. With the advent of modern RF advanced...

The global navigation satellite systems (GNSSs) are increasingly suffering from interferences, such as coming jammers and spoofers, their performance is still modest in challenging urban indoor scenarios. Therefore, there efforts worldwide to develop complementary positioning, navigation, timing (PNT) solutions. One method under current research the so-called LEO-PNT, namely, PNT solutions base...