In Coincident Doppler Broadening Spectroscopy (CDBS) the sum energy of the annihilation photons is checked to be 1022 keV, to validate the measurement of an undisturbed two-gamma electron–positron decay event. The events are stored in a two-dimensional acquisition matrix. A new algorithm is presented, which optimizes the extraction of the one-dimensional CDBS spectrum from this matrix by enhanc...

User position information is an important factor for achieving efficient operation of global wireless networks. It reduces the signalling load generated as a normal consequence of service provision. The basic constellation parameters that should be optimised in the design of the satellite segment of third generation wireless telecommunication networks (i.e., S-UMTS) to provide fast and accurate...

The radar ambiguity function represents the output of the matched filter, and it describes the interference caused by the range and/or Doppler shift of a target when compared to a reference target of equal RCS. The ambiguity function evaluated at is equal to the matched filter output that is matched perfectly to the signal reflected from the target of interest. In other words, returns from the ...

This work introduces a new approach for modeling sea surface current from microwave satellite RADARSAT-1 SAR images. The Doppler shift frequency model was modified by using robust model. The modified Doppler shift frequency model was experienced on the RADARSAT-1 SAR data of two different modes (Wide-3 and Standard 2). The results of the study were validated using real time ocean current measur...

MIMO technologies are beneficial for Mobile ad-hoc networks by providing the diversity and capacity advantage as well as spatial degree of freedom in designing MAC protocol. The integration of MIMO technology in the area of mobile ad-hoc network has great attenuation in commercial and military application. Most important event in wireless communication is the advent of MIMO technologies which u...

Estimation of mobile terminal speed at base station in cellular networks helps BTS in many aspects including channel estimation, adaptive reception, anti-jamming and handover operations. In this paper, we introduce a new algorithm to estimate the channel Doppler shift seen by BTS, using the measured received signals at base station. We have improved an LCR based Doppler shift estimation algorit...

The Doppler effect has well-established applications in astronomy, medicine, radar and metrology. Recently, a number of experimental demonstrations of the inverse Doppler effect have begun to appear. However, the inverse Doppler effect has never been observed on an electronically reconfigurable system with an external electromagnetic wave source at radio frequencies (RF) in experiment. Here we ...