Description of the project: There is today a large demand for indoor positioning information from different application areas. On the other hand it is well known that indoor, the GPS signals are too weak to be received, or practically absent, due to the presence of building materials and walls. In addition, due to the relatively narrow bandwidth used by these systems, multipath propagation can ...

Nowadays, navigation is an unavoidable fact in military and civil aerial transportations. The Global Positioning System (GPS) is commonly used for computing the orientation or attitude of a moving platform. The relative positions of the GPS antennas are computed using the GPS code and/or phase measurements. To achieve a precise attitude determination, Carrier phase observations of GPS requiring...

Spoofing could pose a major threat to Global Positioning System (GPS) navigation, so the GPS users have to gain an in-depth understanding of GPS spoofing. Since spoofing attack can influence position results, spoof compensation is possible through reducing position deviations. In this paper, a novel processing technique is proposed and the wavelet transform is used to eliminate the impact of sp...

background: health system research (hsr) is system planning, coordination, monitoring and management of research resources and activities to achieve health and justice. as the main members of the health system, general practitioners (gps) play an important role in access to health care goals. the aim of the present study was to assess knowledge, attitude, and performance of gps in rafsanjan, ir...