Choice of Modulation Mode and Satellite-Based Radar Altimeter Parameters
https://doi.org/10.32603/1993-8985-2018-21-3-5-14
Abstract
Satellite altimeters play a key role in Earth remote sensing programs. To attain a centimeter accuracy level within the limited energy budget the altimeter probing signal should have a processing gain of the order of tens of thousands. Un-der such circumstances both of the angle modulation modes (LFM, BPSK) are equivalent as for their tactical performance. Preference of LFM in modern foreign devices is based on the tendency to reduce demands to digital processing operation speed by transferring wide-band processing to the analog receiver part. However, modern circuitry capabilities allow to implement digital processing of the signals with the bandwidth of hundreds MHz, giving thereby the way to involving BPSK signals which are not that susceptible to various drifts and external disturbances, do not require frequency modulation super-linearity, etc. In the paper both modulation formats are compared and recommendations are given on how to choose the structure and parameters of BPSK signal.
About the Authors
D. S. Borovitsky
JSC "Russian Institute of Radionavigation and Time".
Russian Federation
Russian Federation
Dmitry S. Borovitsky – Ph.D. in Engineering (2016), leading research fellow . The author of 21 scientific publications. Area of expertise: broadband radiolocation and radionavigation systems; signal theory.
120, Obukhovskoy Oborony Pr., bld. EC, 192012, St. Petersburg.
A. E. Zhesterev
JSC "Russian Institute of Radionavigation and Time".
Russian Federation
Russian Federation
Alexander E. Zhesterev – Ph.D. in Engineering (1982), Chief of the Department. The author of 30 scientific publications. Area of expertise: radiolocation and radionavigation systems; communication theory.
120, Obukhovskoy Oborony Pr., bld. EC, 192012, St. Petersburg.
V. P. Ipatov
Saint Petersburg Electrotechnical University "LETI" .
Russian Federation
Russian Federation
Valery P. Ipatov – D.Sc. in Engineering (1983), Professor (1985) of the Department of Radio Engineering Systems. Honored scientist of the RF (2001), honorable radioman of the USSR (1983). The author of more than 300 scientific publications. Area of expertise: radio-electronic system engineering; statistical communication theory; broadband radar, navigation and data systems; signal theory.
5, Professor Popov Str., 197376, St. Petersburg.
R. M. Mamchur
Saint Petersburg Electrotechnical University "LETI" .
Russian Federation
Russian Federation
Ruslan M. Mamchur – Master of Science in Radio Engineering (2015), post-graduate student and assistant of the Department of Radio Engineering Systems . The author of 10 scientific publications. Area of expertise: statistical communication theory; broadband radar, navigation and data systems; signal theory; technical electrodynamics.
5, Professor Popov Str., 197376, St. Petersburg.
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Review
For citations:
Borovitsky D.S., Zhesterev A.E., Ipatov V.P., Mamchur R.M. Choice of Modulation Mode and Satellite-Based Radar Altimeter Parameters. Journal of the Russian Universities. Radioelectronics. 2018;(3):5-14. (In Russ.) https://doi.org/10.32603/1993-8985-2018-21-3-5-14
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