The scope of D1.4 Gap Analysis of GNSS Receivers and Technology is to review the state-of-the-art for mass market receivers for the mobile terminal market, review the state-of-the-art for high-end Global Navigation Satellite System (GNSS) receivers and identify technology gaps that exist. Given the investigations in D1.1 Market Definition and Core Technology Report on key core technological dri...

In this paper, we investigate the benefits of a MULTI-GNSS receiver in an interference environment. The global satellite navigation systems GPS, GALILEO, GLONASS and COMPASSwill be considered. The regional navigation systems QZSS and IRNSS are not part of the investigation. We assume that a future Multi-GNSS receiver will use only CDMA signals. Therefore, the FDMA signals of the GLONASS system ...

The celebrated LAMBDA method has been widely used in GNSS for fixing integer ambiguities. For real time kinematic GNSS applications with high dimensions, the computational speed is crucial. In this paper a modified LAMBDA method (MLAMBDA) is presented. Several strategies are proposed to reduce the computational complexity. Numerical simulations show that MLAMBDA is (much) faster than LAMBDA.

Herein, we propose a facile and efficient method to obtain the polystyrene/graphene nanosheets (PS/GNSs) nanocomposite particles. As far as we know, it is the first example that GNSs are attached onto the surface of PS microspheres, with such smooth morphology, and without relying on any surface pretreatments of substrate microspheres.

Ground-based pseudolite navigation systems have several limitations, such as low vertical accuracy, susceptibility to multipath effects, and near-far signal problems. These limitations could be addressed with an airborne pseudolite system. However, to ensure high user positioning accuracy the aerial signal transmitters have to be accurately positioned. Commonly used methods are based on the “in...

Global Satellite Navigation Systems (GNSS) have been widely used for positioning, navigation and timing (PNT). Therefore, the integrity of the satellite based navigation systems has been a major concern for many liability critical applications, such as civil aviation, and location-based services (LBS). Over the past two decades, GNSS Receiver Autonomous Integrity Monitoring (RAIM) procedures ha...

Interoperability and compatibility is the main goal for current GNSS systems. A concept of Global Navigation Satellite System (GNSS) is to use all navigation system together to provide better capabilities compared with those that would be achieved relying solely on one service or signal. Compatibility, on the other hand, assures that existing GNSS signal is not degrading each other below certai...

The impetus for this paper and the underlying research is to investigate and develop robust beamforming algorithms with synthetic antenna arrays for GNSS signals. The concepts of synthetic array based beamforming and Angle-Of-Arrival (AOA) estimation for Global Navigation Systems (GNSS) signals are described in this paper. The core idea is the utilization of GNSS antenna motion to synthesize a ...

Ubiquitous global positioning is not feasible by GNSS alone, as it lacks accurate position fixes in dense urban centres and indoors. Hybrid positioning methods have been developed to aid GNSS in those environments. Fingerprinting localization in wireless local area networks (WLANs) is a promising aiding system because of its availability, accuracy, and error mechanisms opposed to that of GNSS. ...

Magnetometers provide compass information, and are widely used for navigation, orientation and alignment of objects. As magnetometers are affected by sensor biases and eventually by systematic distortions of the Earth magnetic field, a calibration is needed. In this paper, a method for calibration of magnetometers with three Global Navigation Satellite System (GNSS) receivers is presented. We p...