GPS signal availability in an urban area-receiver performance analysis

Author(s):  
T.E. Melgard ◽  
G. Lachapelle ◽  
H. Gehue
2017 ◽  
Vol 30 (2) ◽  
pp. 235-244
Author(s):  
Aleksandra Golubovic ◽  
Nikola Sekulovic ◽  
Mihajlo Stefanovic ◽  
Dejan Milic

In this paper, novel mathematical approach for evaluation of probability density function (PDF) of instantaneous signal-to-interference ratio (SIR) at the receiver output in interference-limited environment is proposed. Dual-branch selection combining (SC) receiver operating over correlated Weibull fading channels applying SIR algorithm is considered. Analytical expression for joint PDF of desired signal and interference at the receiver output is derived and used for evaluation of PDF of instantaneous SIR. The expression for PDF of SIR is used for system performance analysis via outage probability, average bit error probability (ABEP) and average output SIR as system performance measures. Numerical results are graphically presented showing the effects of fading severity, average SIR at the input and level of correlation on the diversity receiver performance. In addition, results obtained for the PDF of instantaneous SIR in this paper, are compared to the results when the PDF of instantaneous SIR is directly calculated.


2020 ◽  
Vol 4 (2) ◽  
pp. 119-128
Author(s):  
James J. Atuk ◽  
L. H. Sarki ◽  
Baba Mustapha Bashariya ◽  
B. Ejeh

Tourism is not just a lucrative sector but the fastest growing industry in the world. Many people travel miles to satisfy their pleasure apatite at any destination where satisfaction can be met. But some destinations are flooded while some are scanty. There are many approaches to investigate this and many studies had been done. But despite all these, each destination is unique in terms of its components and attractions combination, this form the basis for this study. The aim of this study is to analyze tourism destination components in Zaria Kaduna State of Nigeria. Tourists’ opinions were sampled through questionnaire at various strategic centers to cover all tourism elements at the destination. Data collected were analyzed using Importance Performance Analysis technique (IPA). The results prove attraction to be the primary destination component i.e. main attractant, while accommodation and accessibility as secondary attractants (Facilitators) in the destination. The outcomes suggest major shortcomings that are traced to poor advertisement, insecurity in the destination e.t.c. The study established the state of the attractiveness of Zaria as a tourist destination, what components and elements are attractive and are not and the factors that influence these. In line with these, the study proposes recommendation that the local tourism board needs to be rejuvenated in other to enhance the local tourism industries to improve its attractiveness among others.


2017 ◽  
Vol 29 (3) ◽  
pp. 310-313 ◽  
Author(s):  
Shi Jia ◽  
Xianbin Yu ◽  
Hao Hu ◽  
Jinlong Yu ◽  
Toshio Morioka ◽  
...  

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