Near Ground Target Signal Localization At 433 MHz Using Improved Trilateration Method
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Date
2012-07
Authors
Zaniani, Marjan Moradi
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Localizing near ground target with Trilateration method implies the
positioning of target coordinate towards a known base point with measuring
distance from target to no less than three recognized reference points.
Distance measurement between three sides of Trilateration could be
performed with different measurement techniques such as RSS or TOA.
RSS measurement technique was used by this research to investigate
the Trilateration concept for determining location on low level antenna
(approximately 1 to 3 m height above ground) at 433 MHz. Initially distance
measurement model versus losses relating to antenna height was measured.
The model was based on experiments conducted in different environments,
namely, flat open space and vegetation area (palm tree plantation) with very
low level shrubs. RSS range model obtained was used for Trilateration
localization process in determining target location (in coordinates) by
measuring distances from target to recognized reference nodes. Offset due to
propagation error and other known phenomenon were corrected using an
innovative algorithm known as Error Correction Algorithm (ECA).
As a result, Trilateration concept using RSS was successfully
developed and applied in this study. Various propagation models were
obtained and the results showed some correlation with other known models
for path loss. From the analysis, worst case propagation losses were
recorded up to 5.25 dB/m in the vegetation area (palm tree) with umbrella
like canopy and low shrubs.
Description
Keywords
Near ground target signal localization at 433 MHZ , using improved trilateration method