HOME
Full Articles List
Search by Author
Title: SIGNAL DETECTION IN PARTIALLY COHERENT SAR
BibTex 
Open this article in the author's DB |
|
SIGNAL DETECTION IN PARTIALLY COHERENT SAR
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
1314-2704
|
|
|
|
||
|
|
English
|
|
|
|
20
|
|
|
|
2.2
|
|
|
|
|
|
|
|
||
|
|
One of the most pressing problems arising during the monitoring of the Earth's surface by space means of observation equipped with synthetic aperture radars is the task of increasing the efficiency of the observation means. A quantitative indicator of the named effectiveness is the probability of the correct detection of spatially distributed targets, as well as the signal-to-noise ratio. In a large number of practical situations, the coherent summation of pulses reflected from the target during the entire time of synthesis of the antenna aperture is not possible, due to phase fluctuations of the reflected signal caused by the instability of the generator, random deviations of the aircraft trajectory, random fluctuations of the reflected signals, etc. In this case, the coherent accumulation time can turn out to be significantly less than the total time of radar imaging, and coherent processing during the whole time of receiving the signal ceases to be optimal, which leads to a deterioration in detection efficiency compared to partially coherent SAR performing coherent accumulation during the coherence time followed by an incoherent summation of the obtained radar images [1,2]. With a limited length of the coherent accumulation session (synthesis session), the most rational means of increasing the detection efficiency is the use of partially coherent processing. In this case, it is assumed that the signal is coherent within a limited area with a subsequent incoherent summation of the accumulated signals. The indicated problem is solved in this paper, where the calculation formulas are obtained and their operability is demonstrated on several typical problems, indicating the requirements for the numerical ratio between the various parameters of the used system.
|
|
|
|
conference
|
|
|
|
||
|
|
||
|
|
20th International Multidisciplinary Scientific GeoConference SGEM 2020
|
|
|
|
20th International Multidisciplinary Scientific GeoConference SGEM 2020, 18 - 24 August, 2020
|
|
|
|
Proceedings Paper
|
|
|
|
STEF92 Technology
|
|
|
|
International Multidisciplinary Scientific GeoConference-SGEM
|
|
|
|
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts & Letters; Acad Fine Arts Zagreb Croatia; C
|
|
|
|
267-274
|
|
|
|
18 - 24 August, 2020
|
|
|
|
website
|
|
|
|
cdrom
|
|
|
|
7071
|
|
|
|
radar remote sensing; change detection; partially coherent SAR
|
|
Download PDF