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Title: Multipath effects on a line-of-sight microwave link
Authors: Sarkar, S K
Raju, K Megha
Punyaseshundu, D
Gupta, M M
Kumar, Rajesh
Prasad, M V S N
Issue Date: Aug-2001
Publisher: NISCAIR-CSIR, India
Abstract: The effects of multipath in relation to the deteriorated performance of a microwave communication link situated between Guntakal and Adoni over the Indian southern region have been investigated. The received signal level under normal condition is usually found to be around -60 dBm. The performance of the link is satisfactory when the signal level is equal to and greater than - 74 dBm, which is the satisfactory level of the signal. It has been seen that the link performance starts deteriorating when the signal level reduces to as low as around -75 dBm. The most problematic months during which the performance of the radio link is not up to the satisfactory level are found to be from November to May. The peaks of the disturbances are in the months of February through May. The performance of the link has been found to be disturbed during 2300-0800 hrs LT. On the basis of low signal level (multipath fading), causes of deterioration in relation to meteorological conditions have been determined. In order to counter multipath fading, some techniques have been discussed in this paper. In future this study can also be taken as a reference for designing the microwave communication systems located in the Indian southern region. It is suggested that the link should be equipped with some diversity system.
Page(s): 194-197
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.30(4) [August 2001]

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