Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/35787
Title: Some meteorological investigations of the performance of two troposcatter links in northern India
Authors: Prasad, M V S N
Sarkar, S K
Reddy, B M
Bhatia, K S
Issue Date: Apr-1995
Publisher: NISCAIR-CSIR, India
Abstract: Troposcatter communication links, in spite of their importance having been declined with the advent of satellite communication, still play vital role in battle fronts. The performance of these links is critically dependent on the vertical fluctuations of refractivity in the first few kilometers. The performance and reliability of two troposcatter links situated in the northern India have been evaluated. Simultaneous measurements of meteorological parameters and signal levels showed that refractivity gradients in the common volume are better correlated with signal levels and sub-refractive gradients in the common volume are responsible for weak signal levels observed in the afternoon hours and sometimes in the late evening hours. As the present space/frequency diversity system is not able to counteract the link outages effectively, a combination of space/angle diversity system is proposed because angle diversity can work better under sub-refractive conditions than other diversity systems.
Page(s): 69-76
URI: http://nopr.niscair.res.in/handle/123456789/35787
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.24(2) [April 1995]

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