نتایج جستجو برای: signal receiver

تعداد نتایج: 461056  

2011
Christian Schindelhauer Zvi Lotker Johannes Wendeberg

We consider an anchor-free, relative localization and synchronization problem where a set of n receiver nodes and m wireless signal sources are independently, uniformly, and randomly distributed in a disk in the plane. The signals can be distinguished and their capture times can be measured. At the beginning neither the positions of the signal sources and receivers are known nor the sending mom...

2013
Mohammad Upal Mahfuz Dimitrios Makrakis H. T. Mouftah

In this paper, a generalized strength-based signal detection model for Concentration-Encoded Molecular Communication (CEMC) has been presented. The generalized strength-based signal detection problem in diffusion-based CEMC system has been investigated in the presence of both diffusion noise and intersymbol interference (ISI). Amplitude-shift keying (ASK)modulated CEMC system has been considere...

Journal: :iranian journal of medical physics 0
m.a. oghabian associate professor, physics and biomedical engineering, tehran university of medical sciences, tehran, iran. research center for science & technology in medicine, imam khomeini hospital, tehran. iran. sh. mehdipour m.sc. in research center for science & technology in medicine, imam khomeini hospital, tehran. iran. n. riahicalam associate professor, physics and biomedical engineering, tehran university of medical sciences, tehran, iran. research center for science & technology in medicine, imam khomeini hospital, tehran. iran. b. rafie b. sc. in medical imaging center, imam khomeini hospital, tehran university of medical sciences, tehran, iran. h. ghanaati associate professor, radiology dept., medical imaging center, imam khomeini hospital, tehran university of medical sciences, tehran, iran.

introduction: one of the major causes of image non-uniformity in mri is due to the existence of  non-homogeneity in rf receive and transmit. this can be the most effective source of error in  quantitative  studies  in  mri  imaging.  part  of  this  non-homogeneity  demonstrates  the  characteristics of rf coil and part of it is due to the interaction of rf field with the material being  imaged...

Journal: :IEEE Trans. Communications 2002
Louis G. F. Trichard Jamie S. Evans Iain B. Collings

In this paper, we derive an expression for the signal to interference-plus-noise ratio of a linear multistage parallel interference cancellation receiver. We focus on a linear multistage receiver which converges to the linear minimum mean-squared error receiver as the number of stages increases. The signal to interference-plus-noise ratio is given in terms of the system loading, the partial can...

2004
Ahsan

The third-generation universal mobile telecommunications system (UMTS) uses direct-sequence code division multiple access (DS-CDMA) to transmit data. DS-CDMA is well suited to transmit data over the multipath fading channel. The high signal bandwidth for the WCDMA system (5 MHz) allows the received signal to be split into distinct multipaths with high resolution. For the first generation of UMT...

2005
Neil Gerein

The date is fast approaching for the first Galileo signals to be broadcast from space. In anticipation of this event, NovAtel has undertaken various Galileo related projects over the past three years. Projects have included sample level software simulations sponsored by the European Space Agency (ESA) and a single frequency BOC(1,1) receiver prototype sponsored by the Canadian Space Agency (CSA...

2013
Seong-Geun Kwon Ki-Ryong Kwon Eung-Joo Lee Suk-Hwan Lee

This paper presents the method of emergency warning system operation based on T -DMB and th e design of T-DMB AEAS(Automatic Emergency Alert Service) receiver model. The proposed receiver model compares the geographical location of emergency with the location of DMB transmitting station from TDMB broadcasting signal and classifies the receiver location into alert region, neighboring region and ...

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