Relative navigation of multiple spacecraft based on the processing Global Navigation Satellite System (GNSS) signals has been successfully performed in Low Earth Orbit (LEO). An accuracy order one millimeter for relative positioning can be achieved post-processing by using Carrier Phase Differential GNSS (CDGNSS) and recovering correct carrier phase integer ambiguity. However, real-time perform...

Recent progress in bistatic radar techniques can be used to improve performances of classical monostatic radar. A prominent limitation of coherent radar is its inability to measure the complete velocity vector (magnitude and direction) of a detected target. A single coherent detection can provide range-rate only. At least two detections, separated in time, are needed to estimate the target’s ve...

In this paper, we consider problem of positioning of mobile phones, different approaches were produced for these targets using GPS, WiFi, GSM, UMTS and other sensors, which exist in today smart phone sensors. Location awareness in general is emerging a tremendous interest in different fields and scopes. Position is the key element of context awareness. However GPS produces an accurate position,...