Methods for Anomalous Azimuth Estimate Censoring in Small Element Antenna Arrays
Abstract
There are abnormal azimuth estimates caused by multipath propagation and adjacent signal spectra overlapping in azimuth estimates of radio source created by radio monitoring complexes in broad band. In case of multipath propagation, the radio signal phase formed by addition of multipath components in antenna depends on their amplitudes and phases. If amplitudes of multipath components are approximately identical, and the initial phase difference is from
160 to 200° then the radio signal phase in each antenna may have abnormal value which does not correspond to the direction of multipath component arrival and results in abnormal azimuth estimates. When adjacent signal spectra are overlapping there appear the abnormal estimates depending on the amplitude and azimuth of spectral component signals from different radio sources. Determination and censoring methods are offered for the both types of abnormal estimates. Censoring of the abnormal estimates caused by a multipath propagation involves determination of estimation histogram areas where estimates are grouped or deleted in case they do not belong to this area. Censoring of abnormal estimates caused by adjacent signals spectra overlapping is based on correlative approach, and consists in determination of the range formed by adjacent frequency samples, for which azimuth estimates are strongly correlated between themselves. Application of proposed methods is shown by statistical simulation modeling results and radio monitoring complex data processing results.
About the Authors
M. E. Shevchenko
Saint Petersburg Electrotechnical University "LETI"
Russian Federation
Russian Federation
Ph.D. in engineering (1997), Associate Professor (2002) of the Department of Radio Electronics Equipment of Saint Petersburg Electrotechnical University "LETI". The author of 45 scientific publications. Area of expertise: radio signals reserving and processing; frequency radio monitoring; digital signal processing
V. N. Malyshev
Saint Petersburg Electrotechnical University "LETI"
Russian Federation
Russian Federation
D.Sc. in engineering (2000), Professor (2004), the Dean of faculty of Radio Equipment and Telecommunications of Saint Petersburg Electrotechnical University "LETI". The author of mors than 100 scientific publications. Area of expertise: numerical methods; microwave engineering; antennas; information networks; information security
D. O. Zadirako
JSC «SRI "Vector"»
Russian Federation
Russian Federation
Dipl.-engineer in Radio Electronic Systems (2010, Saint Petersburg Electrotechnical University "LETI"), the engineer of JSC «SRI "Vector"» (Saint Petersburg). The author of six scientific publications. Area of expertise: radio signals reserving and processing; digital signal processing; signal detection and finding
D. N. Faizullina
JSC «SRI "Vector"»
Russian Federation
Russian Federation
Master of Science in Information Technologies and Communication Systems (2013), the engineer of JSC «SRI "Vector"» (Saint Petersburg). The author of seven scientific publications. Area of expertise: radio signals reserving and processing; digital signal processing; signal detection and finding
N. S. Stenyukov
JSC «SRI "Vector"»
Russian Federation
Russian Federation
Ph.D. in Engineering (1974), the leader scientist of JSC «SRI "Vector"» (Saint Petersburg). The author of 35 scientific publications. Area of expertise: digital signal processing in radio monitoring
M. S. Shmyrin
JSC «SRI "Vector"»
Russian Federation
Russian Federation
Dipl.-engineer in Radio Engineering (2005, Saint Petersburg Electrotechnical University "LETI"), the chief of the Department of JSC «SRI "Vector"» (Saint Petersburg). The author of four scientific publications. Area of expertise: hardware and software in the radio monitoring
References
1. Gutin V. S., Shevchenko M. E. Anomalous Estimation of Radio Emission Source Directions under Multipath Conditions. 3d Vseross. konf. "Radioelektronnye sredstva polucheniya, obrabotki i vizualizatsii informatsii, 26-28 iyunya 2013 g., Smolensk [3d All-Russian Conference "Radioelectronic Means of Information Obtaining, Processing and Visualization"]. June 26-28, 2013, Smolensk, pp. 166-169.
2. Shevchenko M. E. Estimation of Signal Arrival Directions under Multipath Conditions. 4th Vseross. konf. "Radioelektronnye sredstva polucheniya, obrabotki i vizualizatsii informatsii, 24-26 sent. 2014 g., Nizhnii Novgorod [4th All-Russian Conference " Radioelectronic Means of Received October, 17, 2017 Information Obtaining, Processing and Visualization "]. Sept. 24-26, 2014, Nizhny Novgorod, pp. 165-169.
3. Launer R. L., Wilkinson G. N. Robustness in Statistics. New York, Academic press, 1979, 312 p.
4. Huber P. J. Robustness Statistics. New York, John Wiley and Sons, 1981, 320 p.
5. Shevchenko M. E., Chemarov A. O. Obnaruzhenie i otsenivanie parametrov istochnikov radioizlucheniya v shirokoi polose obzora [Detection and Estimation of Radio Emission Source Parameters in a Wide Swath]. SPb, Izd-vo SPbGETU "LETI", 2011, 136 p.
Review
For citations:
Shevchenko M.E., Malyshev V.N., Zadirako D.O., Faizullina D.N., Stenyukov N.S., Shmyrin M.S. Methods for Anomalous Azimuth Estimate Censoring in Small Element Antenna Arrays. Journal of the Russian Universities. Radioelectronics. 2017;(5):5-11. (In Russ.)
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