76 research outputs found
Π‘ΠΌΠ΅ΡΠ΅Π½ΠΈΠ΅ ΡΡΠΎΠ²Π½Ρ Π·Π½Π°ΡΠΈΠΌΠΎΡΡΠΈ ΠΈ ΠΌΠΎΡΠ½ΠΎΡΡΠΈ ΠΊΡΠΈΡΠ΅ΡΠΈΡ ΠΏΡΠΈ ΠΊΠΎΠ½Π΅ΡΠ½ΠΎΠΉ ΠΊΡΡΡΠΈΠ·Π½Π΅ ΠΏΠ΅ΡΠ΅Ρ ΠΎΠ΄Π½ΠΎΠΉ Ρ Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ
ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ ΡΠΌΠ΅ΡΠ΅Π½ΠΈΡ ΡΡΠΎΠ²Π½Ρ Π·Π½Π°ΡΠΈΠΌΠΎΡΡΠΈ ΠΈ ΠΌΠΎΡΠ½ΠΎΡΡΠΈ ΠΊΡΠΈΡΠ΅ΡΠΈΡ, ΠΊΠΎΠ³Π΄Π° ΠΏΡΠΈ ΠΏΡΠΎΠ²Π΅ΡΠΊΠ΅ ΡΡΠ°ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
Π³ΠΈΠΏΠΎΡΠ΅Π· Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΏΡΠ°Π²ΠΈΠ»Π° ΠΠ΅ΠΉΠΌΠ°Π½Π° β ΠΠΈΡΡΠΎΠ½Π° Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΌΠΎΠ΄Π΅Π»ΠΈ ΠΏΠ΅ΡΠ΅Ρ
ΠΎΠ΄Π½ΠΎΠΉ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ Π»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΡ
Π΅ΠΌΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ ΠΏΡΠΎΡΡΠ°Ρ ΡΡΠ½ΠΊΡΠΈΡ ΠΎΡΠΈΠ±ΠΎΠΊ. Π‘ΠΌΠ΅ΡΠ΅Π½ΠΈΡ ΡΠ°ΡΡΡΠΈΡΠ°Π½Ρ Π΄Π»Ρ ΡΡΠ»Π΅Π΅Π²ΡΠΊΠΈΡ
ΡΡΠ½ΠΊΡΠΈΠΉ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ. Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΈΠ· Π²Π°ΡΡΠΈΡΡΠ΅ΠΌΡΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ ΠΎΠ±ΠΎΠ±ΡΠ΅Π½Π½ΠΎΠ΅ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠ΅ ΡΠΈΠ³Π½Π°Π»-ΠΏΠΎΠΌΠ΅Ρ
Π°.Β ΠΠ°Ρ
ΠΌΠ°Π½ΡΠΎΠ½ Π. Π‘., ΠΠΎΡΡΠ΅Π½Π½ΠΈΠΊΠΎΠ² Π. Π‘., ΠΠΈΡΠ°ΠΊ Π. Π. Π‘ΠΌΠ΅ΡΠ΅Π½ΠΈΠ΅ ΡΡΠΎΠ²Π½Ρ Π·Π½Π°ΡΠΈΠΌΠΎΡΡΠΈ ΠΈ ΠΌΠΎΡΠ½ΠΎΡΡΠΈ ΠΊΡΠΈΡΠ΅ΡΠΈΡ ΠΏΡΠΈ ΠΊΠΎΠ½Π΅ΡΠ½ΠΎΠΉ ΠΊΡΡΡΠΈΠ·Π½Π΅ ΠΏΠ΅ΡΠ΅Ρ
ΠΎΠ΄Π½ΠΎΠΉ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ. Ural Radio Engineering Journal. 2022;6(4):378β389. DOI: 10.15826/urej.2022.6.4.002
ΠΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΠ΅ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΉ Π΄Π²ΠΈΠΆΡΡΠΈΡ ΡΡ ΠΏΡΡΠΌΠΎΠ»ΠΈΠ½Π΅ΠΉΠ½ΠΎ Π²ΠΎΠ·Π΄ΡΡΠ½ΡΡ ΡΠ΅Π»Π΅ΠΉ ΠΏΡΠΈ Π²ΡΠΎΡΠΈΡΠ½ΠΎΠΉ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠ΅ ΡΠ°Π΄ΠΈΠΎΠ»ΠΎΠΊΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΈ
Introduction. The primary functions of secondary processing of radar information are to detect and maintain the trajectories of air targets (AT). The AT trajectory detection can be characterised by the probability of detecting trajectory and average autocapture time. When the target moves, its distance from the radar station changes, leading to a change in the signal/noise ratio and the probability of detecting AT.Aim. To assess the impact of a change in the probability of detection of a straight and evenly moving target at consecutive time intervals of radar observation upon the characteristics of trajectory detection during secondary processing of radar information.Methods and materials. The research aim was achieved using the methods of mathematical statistics, including verification of statistical hypotheses, assessment of distribution parameters and theory of perturbations by small parameters. The ratio of the distance travelled by the AT during the review period to the target range at the initial moment of its detection was chosen as a perturbation parameter.Results. Analytical expressions were established for the probability of detecting a straight-moving AT and the probability of detecting the trajectory of its movement at interval multiples during the study period. The study illustrated the probability of detecting AT moving away from radar by means of consistent radar observations with reduced signal/noise ratios and angles between the velocity vector and the AT vector radius relative to the radar. The increase in AT speed which causes the z parameter to change from 0.01 to 0.07 reduces the probability of AT detection from 0.727 to 0.52 and leads to a corresponding change in the probability of detecting the trajectory. If the observation time is reduced by one time interval, the probability of detecting the trajectory is from 0.03 to 0.04β¦0.07 for signal/noise 40 ratio and from 0.06 to 0.08β¦0.11 for signal/noise 25 ratio (with the probability of false alarm 10β4 ).Conclusion. The resulting expressions allow for the calculation of directly moving AT trajectory detection, considering changes in the probability of detecting targets in successive time intervals of radar observations.ΠΠ²Π΅Π΄Π΅Π½ΠΈΠ΅. ΠΡΠ½ΠΎΠ²Π½ΡΠΌΠΈ Π·Π°Π΄Π°ΡΠ°ΠΌΠΈ Π²ΡΠΎΡΠΈΡΠ½ΠΎΠΉ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ ΡΠ°Π΄ΠΈΠΎΠ»ΠΎΠΊΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΡΠ²Π»ΡΡΡΡΡ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΠ΅ ΠΈ ΡΠΎΠΏΡΠΎΠ²ΠΎΠΆΠ΄Π΅Π½ΠΈΠ΅ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΉ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ Π²ΠΎΠ·Π΄ΡΡΠ½ΡΡ
ΡΠ΅Π»Π΅ΠΉ (ΠΠ¦). ΠΡΠΈ ΡΡΠΎΠΌ ΠΏΡΠΎΡΠ΅ΡΡ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΉ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ ΠΠ¦ ΠΏΡΠΈΠ½ΡΡΠΎ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΠΎΠ²Π°ΡΡ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΡΠΌΠΈ ΠΈΡ
ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΠΈ ΡΡΠ΅Π΄Π½ΠΈΠΌ Π²ΡΠ΅ΠΌΠ΅Π½Π΅ΠΌ ΠΈΡ
Π°Π²ΡΠΎΠ·Π°Ρ
Π²Π°ΡΠ°. ΠΡΠΈ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΠΈ ΡΠ΅Π»ΠΈ Π΅Π΅ Π΄Π°Π»ΡΠ½ΠΎΡΡΡ ΠΎΡ ΡΠ°Π΄ΠΈΠΎΠ»ΠΎΠΊΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΡΡΠ°Π½ΡΠΈΠΈ (Π ΠΠ‘) ΠΈΠ·ΠΌΠ΅Π½ΡΠ΅ΡΡΡ, ΡΡΠΎ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ ΡΠΈΠ³Π½Π°Π»/ΡΡΠΌ ΠΈ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠΈ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΠΠ¦.Π¦Π΅Π»Ρ ΡΠ°Π±ΠΎΡΡ. ΠΡΠ΅Π½ΠΊΠ° Π²Π»ΠΈΡΠ½ΠΈΡ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠΈ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΠΏΡΡΠΌΠΎΠ»ΠΈΠ½Π΅ΠΉΠ½ΠΎ Π΄Π²ΠΈΠΆΡΡΠ΅ΠΉΡΡ ΡΠ΅Π»ΠΈ ΠΏΡΠΈ ΡΠ°Π΄ΠΈΠΎΠ»ΠΎΠΊΠ°ΡΠΈΠΎΠ½Π½ΡΡ
Π½Π°Π±Π»ΡΠ΄Π΅Π½ΠΈΡΡ
Π½Π° Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΈ Π΅Π΅ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ ΠΏΡΠΈ Π²ΡΠΎΡΠΈΡΠ½ΠΎΠΉ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠ΅ ΡΠ°Π΄ΠΈΠΎΠ»ΠΎΠΊΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΈ.ΠΠ΅ΡΠΎΠ΄Ρ. ΠΡΠΏΠΎΠ»ΡΠ·ΡΡΡΡΡ ΠΌΠ΅ΡΠΎΠ΄Ρ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΡΠ°ΡΠΈΡΡΠΈΠΊΠΈ: ΠΏΡΠΎΠ²Π΅ΡΠΊΠ° ΡΡΠ°ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
Π³ΠΈΠΏΠΎΡΠ΅Π·, ΠΎΡΠ΅Π½ΠΊΠ° ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠΉ ΠΈ ΡΠ΅ΠΎΡΠΈΡ Π²ΠΎΠ·ΠΌΡΡΠ΅Π½ΠΈΠΉ ΠΏΠΎ ΠΌΠ°Π»ΠΎΠΌΡ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ. Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π²ΠΎΠ·ΠΌΡΡΠ°ΡΡΠ΅Π³ΠΎ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ° Π²ΡΠ±ΡΠ°Π½ΠΎ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠ΅ ΡΠ°ΡΡΡΠΎΡΠ½ΠΈΡ, ΠΏΡΠΎΡ
ΠΎΠ΄ΠΈΠΌΠΎΠ³ΠΎ ΠΠ¦ Π·Π° ΠΏΠ΅ΡΠΈΠΎΠ΄ ΠΎΠ±Π·ΠΎΡΠ°, ΠΊ Π΄Π°Π»ΡΠ½ΠΎΡΡΠΈ ΡΠ΅Π»ΠΈ Π² Π½Π°ΡΠ°Π»ΡΠ½ΡΠΉ ΠΌΠΎΠΌΠ΅Π½Ρ Π΅Π΅ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ.Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. ΠΠΎΠ»ΡΡΠ΅Π½Ρ Π°Π½Π°Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ Π²ΡΡΠ°ΠΆΠ΅Π½ΠΈΡ Π΄Π»Ρ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠΈ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΠΏΡΡΠΌΠΎΠ»ΠΈΠ½Π΅ΠΉΠ½ΠΎ Π΄Π²ΠΈΠΆΡΡΠ΅ΠΉΡΡ ΠΠ¦ ΠΈ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠΈ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΈ Π΅Π΅ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ Π½Π° ΠΈΠ½ΡΠ΅ΡΠ²Π°Π»Π°Ρ
, ΠΊΡΠ°ΡΠ½ΡΡ
ΠΏΠ΅ΡΠΈΠΎΠ΄Ρ ΠΎΠ±Π·ΠΎΡΠ°. ΠΡΠΎΠΈΠ»Π»ΡΡΡΡΠΈΡΠΎΠ²Π°Π½ΠΎ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΠ΅ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠΈ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΠΠ¦, ΡΠ΄Π°Π»ΡΡΡΠ΅ΠΉΡΡ ΠΎΡ Π ΠΠ‘, ΠΏΡΠΈ ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΡΡ
ΡΠ°Π΄ΠΈΠΎΠ»ΠΎΠΊΠ°ΡΠΈΠΎΠ½Π½ΡΡ
Π½Π°Π±Π»ΡΠ΄Π΅Π½ΠΈΡΡ
Ρ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΠ΅ΠΌ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠΉ ΡΠΈΠ³Π½Π°Π»/ΡΡΠΌ ΠΈ ΡΠ³Π»Π° ΠΌΠ΅ΠΆΠ΄Ρ Π²Π΅ΠΊΡΠΎΡΠΎΠΌ ΡΠΊΠΎΡΠΎΡΡΠΈ ΠΈ ΡΠ°Π΄ΠΈΡΡΠΎΠΌ-Π²Π΅ΠΊΡΠΎΡΠΎΠΌ ΠΠ¦ ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎ Π ΠΠ‘. Π£Π²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠ΅ ΡΠΊΠΎΡΠΎΡΡΠΈ ΠΠ¦, Π²ΡΠ·ΡΠ²Π°ΡΡΠ΅Π΅ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ° z Ρ 0.01 Π΄ΠΎ 0.07, ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΡ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠΈ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΠΠ¦ Ρ 0.727 Π΄ΠΎ 0.52 ΠΈ ΠΊ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΡΡΡΠ΅ΠΌΡ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠΈ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΈ. ΠΡΠΈ ΡΠΎΠΊΡΠ°ΡΠ΅Π½ΠΈΠΈ Π²ΡΠ΅ΠΌΠ΅Π½ΠΈ Π½Π°Π±Π»ΡΠ΄Π΅Π½ΠΈΡ Π½Π° ΠΎΠ΄ΠΈΠ½ Π²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠΉ ΠΈΠ½ΡΠ΅ΡΠ²Π°Π» ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΠ΅ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠΈ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΈ ΡΠΎΡΡΠ°Π²Π»ΡΠ΅Ρ ΠΎΡ 0.03 Π΄ΠΎ 0.04...0.07 Π΄Π»Ρ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ ΡΠΈΠ³Π½Π°Π»/ΡΡΠΌ 40 ΠΈ ΠΎΡ 0.06 Π΄ΠΎ 0.08...0.11 Π΄Π»Ρ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ ΡΠΈΠ³Π½Π°Π»/ΡΡΠΌ 25 (ΠΏΡΠΈ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠΈ Π»ΠΎΠΆΠ½ΠΎΠΉ ΡΡΠ΅Π²ΠΎΠ³ΠΈ 10β4 ).ΠΠ°ΠΊΠ»ΡΡΠ΅Π½ΠΈΠ΅. ΠΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ Π²ΡΡΠ°ΠΆΠ΅Π½ΠΈΡ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡΡ ΡΠ°ΡΡΡΠΈΡΡΠ²Π°ΡΡ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΉ Π²ΠΎΠ·Π΄ΡΡΠ½ΡΡ
ΡΠ΅Π»Π΅ΠΉ, Π΄Π²ΠΈΠΆΡΡΠΈΡ
ΡΡ ΠΏΡΡΠΌΠΎΠ»ΠΈΠ½Π΅ΠΉΠ½ΠΎ, Ρ ΡΡΠ΅ΡΠΎΠΌ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠΉ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠ΅ΠΉ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΡΠ΅Π»Π΅ΠΉ Π² ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΡΡ
Π²ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
ΠΈΠ½ΡΠ΅ΡΠ²Π°Π»Π°Ρ
ΠΎΠ±Π·ΠΎΡΠ° ΡΠ°Π΄ΠΈΠΎΠ»ΠΎΠΊΠ°ΡΠΈΠΎΠ½Π½ΡΡ
Π½Π°Π±Π»ΡΠ΄Π΅Π½ΠΈΠΉ
ΠΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΏΡΠΈΠ΅ΠΌΠ° ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΡΠΈΡΠΎΠΊΠΎΠΏΠΎΠ»ΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠΈΠ³Π½Π°Π»Π° Ρ ΠΊΠ²Π°Π΄ΡΠ°ΡΡΡΠ½ΠΎΠΉ ΡΠ°Π·ΠΎΠ²ΠΎΠΉ ΠΌΠΎΠ΄ΡΠ»ΡΡΠΈΠ΅ΠΉ Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ Π²Π·Π°ΠΈΠΌΠ½ΡΡ ΠΏΠΎΠΌΠ΅Ρ ΠΈ Π²Π½ΡΡΡΠ΅Π½Π½ΠΈΡ ΡΡΠΌΠΎΠ² Π°ΠΏΠΏΠ°ΡΠ°ΡΡΡΡ
Receiving of the broadband phase modulated signal with quadrature phase-shift keying in case of multiple access in-terference and internal Gaussian noise has been considered. Bit error rate of broadband phase modulated signal with quadrature phase-shift keying has been obtained in case amplitudes of receiving signal and interferences have both regu-lar and fluctuating components. Broadband phase modulated signal bit error rate as a function of signal-to-noise ratio, signal-to-interference ratio, number of interferences and false positive probability has been analyzed.Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½ ΠΏΡΠΈΠ΅ΠΌ ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠΈΡΠΎΠΊΠΎΠΏΠΎΠ»ΠΎΡΠ½ΡΡ
ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Ρ ΠΊΠ²Π°Π΄ΡΠ°ΡΡΡΠ½ΠΎΠΉ ΠΌΠΎΠ΄ΡΠ»ΡΡΠΈΠ΅ΠΉ ΡΠ°Π· ΠΏΡΠ΅Π²Π΄ΠΎΡΠ»ΡΡΠ°ΠΉΠ½ΡΠΌΠΈ ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΡΠΌΠΈ Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
Π²Π·Π°ΠΈΠΌΠ½ΡΡ
ΠΏΠΎΠΌΠ΅Ρ
, ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½Π½ΡΡ
ΠΌΠ½ΠΎΠ³ΠΎΡΡΠ°Π½ΡΠΈΠΎΠ½Π½ΡΠΌ Π΄ΠΎΡΡΡΠΏΠΎΠΌ, ΠΈ Π²Π½ΡΡΡΠ΅Π½Π½ΠΈΡ
ΡΡΠΌΠΎΠ² Π°ΠΏΠΏΠ°ΡΠ°ΡΡΡΡ. ΠΠΎΠ»ΡΡΠ΅Π½Ρ Π°Π½Π°Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ Π²ΡΡΠ°ΠΆΠ΅Π½ΠΈΡ Π΄Π»Ρ ΡΡΠ΅Π΄Π½Π΅ΠΉ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠΈ ΠΎΡΠΈΠ±ΠΊΠΈ ΠΎΡΠ΅Π½ΠΈΠ²Π°Π½ΠΈΡ Π·Π½Π°ΡΠ΅Π½ΠΈΠΉ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΎΠ½Π½ΡΡ
ΡΠΈΠΌΠ²ΠΎΠ»ΠΎΠ² ΠΏΡΠΈ ΠΏΡΠΈΠ΅ΠΌΠ΅ ΡΠΈΠ³Π½Π°Π»ΠΎΠ² ΡΠΎ ΡΠ»ΡΡΠ°ΠΉΠ½ΡΠΌΠΈ Π½Π°ΡΠ°Π»ΡΠ½ΡΠΌΠΈ ΡΠ°Π·Π°ΠΌΠΈ ΠΈ Π°ΠΌΠΏΠ»ΠΈΡΡΠ΄Π°ΠΌΠΈ, ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΠΌΠΈ ΡΠ΅Π³ΡΠ»ΡΡΠ½ΡΠ΅ ΠΈ ΡΠ»ΡΠΊΡΡΠ°ΡΠΈΠΎΠ½Π½ΡΠ΅ ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΠ΅, Ρ ΡΡΠ΅ΡΠΎΠΌ ΡΠ°Π·ΠΎΠ²ΡΡ
ΡΠ»ΡΠΊΡΡΠ°ΡΠΈΠΉ ΠΊΠ°Π½Π°Π»Π° ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ. ΠΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Ρ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠΈ ΠΎΡΠΈΠ±ΠΊΠΈ ΠΎΡ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠΉ "ΡΠΈΠ³Π½Π°Π»/ΡΡΠΌ" ΠΈ "ΠΏΠΎΠΌΠ΅Ρ
Π°/ΡΡΠΌ", ΡΠΈΡΠ»Π° ΠΏΠΎΠΌΠ΅Ρ
ΠΈ ΠΊΠ°ΡΠ΅ΡΡΠ²Π° ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ
ΠΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΉ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ Π²ΠΎΠ·Π΄ΡΡΠ½ΡΡ ΡΠ΅Π»Π΅ΠΉ ΠΏΡΠΈ Π²ΡΠΎΡΠΈΡΠ½ΠΎΠΉ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠ΅ ΡΠ°Π΄ΠΈΠΎΠ»ΠΎΠΊΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΈ
The article considers statistical descriptions of time interval estimation for air target motion trajectory au-tomatic detection in radar information secondary processing. Analytical expressions for confidential proba-bilities of the air target motion trajectory automatic detection are obtained. It is supposed that the target loca-tion mark appearance is invariable within the whole observation time. The confidential probability dependences are analyzed from the signal noise ratio for the received signals with random amplitudes and elementary phases. It is shown that the target motion trajectory determination probability increases with the increase of signal noise ratio and decrease of radar observation period number.Π Π°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ ΠΈΠ½ΡΠ΅ΡΠ²Π°Π»ΡΠ½Π°Ρ ΠΎΡΠ΅Π½ΠΊΠ° Π²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ ΠΈΠ½ΡΠ΅ΡΠ²Π°Π»Π° Π°Π²ΡΠΎΠ·Π°Ρ
Π²Π°ΡΠ° ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΈ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ Π²ΠΎΠ·Π΄ΡΡΠ½ΡΡ
ΡΠ΅Π»Π΅ΠΉ ΠΏΡΠΈ Π²ΡΠΎΡΠΈΡΠ½ΠΎΠΉ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠ΅ ΡΠ°Π΄ΠΈΠΎΠ»ΠΎΠΊΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΈ. ΠΠΎΠ»ΡΡΠ΅Π½Ρ Π°Π½Π°Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ Π²ΡΡΠ°ΠΆΠ΅Π½ΠΈΡ Π΄Π»Ρ Π΄ΠΎΠ²Π΅ΡΠΈΡΠ΅Π»ΡΠ½ΡΡ
Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠ΅ΠΉ, ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΡΡΡΠΈΡ
Π·Π°Π΄Π°Π½Π½ΡΠΌ Π²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠΌ ΠΈΠ½ΡΠ΅ΡΠ²Π°Π»Π°ΠΌ. ΠΠ½Π°Π»ΠΈΠ·ΠΈΡΡΡΡΡΡ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ Π΄ΠΎΠ²Π΅ΡΠΈΡΠ΅Π»ΡΠ½ΡΡ
Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠ΅ΠΉ ΠΎΡ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠΉ "ΡΠΈΠ³Π½Π°Π»/ΡΡΠΌ" ΠΏΡΠΈ ΠΏΡΠΈΠ΅ΠΌΠ΅ ΡΠΈΠ³Π½Π°Π»ΠΎΠ² ΡΠΎ ΡΠ»ΡΡΠ°ΠΉΠ½ΡΠΌΠΈ Π°ΠΌΠΏΠ»ΠΈΡΡΠ΄Π°ΠΌΠΈ ΠΈ Π½Π°ΡΠ°Π»ΡΠ½ΡΠΌΠΈ ΡΠ°Π·Π°ΠΌΠΈ
Raman Study of Oxygen Reduced and Re-Oxidized Strontium Titanate
We report Raman study of oxygen-reduced single crystal strontium titanate. Oxygen reduction leads to the appearance of the forbidden first order Raman peaks, as well as new spectral features attributed to the local vibrational modes associated with oxygen vacancies. This assignment is supported by ab initio calculations of phonon modes in SrTiO3 with introduced oxygen vacancies. Raman studies of re-oxidized samples show the same spectra as the initial single crystals. Comparison of Raman spectra of SrTiO3 thin films and reduced SrTiO3 single crystals demonstrates the importance of other factors such as polar grain boundaries in the lattice dynamical behavior of thin films
ΠΠ»ΠΈΡΠ½ΠΈΠ΅ ΡΠ½Π΅ΡΠ³Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ ΠΏΠΎΡΠ΅ΡΡ ΠΏΡΠΈ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠ΅ ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Π½Π° ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΡΡ Π΄Π°Π»ΡΠ½ΠΎΡΡΡ Π΄Π΅ΠΉΡΡΠ²ΠΈΡ ΠΈ ΡΠΎΡΠ½ΠΎΡΡΡ ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΡ ΠΊΠΎΠΎΡΠ΄ΠΈΠ½Π°Ρ Π² ΡΠ°Π΄ΠΈΠΎΠ»ΠΎΠΊΠ°ΡΠΈΠΎΠ½Π½ΡΡ ΡΠΈΡΡΠ΅ΠΌΠ°Ρ
Deterioration maximum range and accuracy of measurement range and angular coordinates caused by energy losses during processing phase manipulated radio signals is considered. It has been shown that a decrease of energy losses is possible by using a phase-manipulated signals with smoothly changing phase between the elementary pulses.Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½ΠΎ ΡΡ
ΡΠ΄ΡΠ΅Π½ΠΈΠ΅ ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠΉ Π΄Π°Π»ΡΠ½ΠΎΡΡΠΈ Π΄Π΅ΠΉΡΡΠ²ΠΈΡ ΠΈ ΡΠΎΡΠ½ΠΎΡΡΠΈ ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΡ Π΄Π°Π»ΡΠ½ΠΎΡΡΠΈ ΠΈ ΡΠ³-Π»ΠΎΠ²ΡΡ
ΠΊΠΎΠΎΡΠ΄ΠΈΠ½Π°Ρ ΡΠ΅Π»Π΅ΠΉ Π·Π° ΡΡΠ΅Ρ ΡΠ½Π΅ΡΠ³Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠΎΡΠ΅ΡΡ, Π²ΠΎΠ·Π½ΠΈΠΊΠ°ΡΡΠΈΡ
ΠΏΡΠΈ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠ΅ ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠ°Π΄ΠΈΠΎΡΠΈΠ³Π½Π°Π»ΠΎΠ². ΠΠΎΠΊΠ°Π·Π°Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΡ ΡΠΊΠ°Π·Π°Π½Π½ΡΡ
ΠΏΠΎΡΠ΅ΡΡ ΠΏΡΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠΈ ΡΠ°Π·ΠΎ-ΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Ρ ΠΏΠ»Π°Π²Π½ΡΠΌ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ ΡΠ°Π·Ρ ΠΌΠ΅ΠΆΠ΄Ρ ΡΠ»Π΅ΠΌΠ΅Π½ΡΠ°ΡΠ½ΡΠΌΠΈ ΠΈΠΌΠΏΡΠ»ΡΡΠ°ΠΌΠΈ
Numerical study of anharmonic vibrational decay in amorphous and paracrystalline silicon
The anharmonic decay rates of atomic vibrations in amorphous silicon (a-Si)
and paracrystalline silicon (p-Si), containing small crystalline grains
embedded in a disordered matrix, are calculated using realistic structural
models. The models are 1000-atom four-coordinated networks relaxed to a local
minimum of the Stillinger-Weber interatomic potential. The vibrational decay
rates are calculated numerically by perturbation theory, taking into account
cubic anharmonicity as the perturbation. The vibrational lifetimes for a-Si are
found to be on picosecond time scales, in agreement with the previous
perturbative and classical molecular dynamics calculations on a 216-atom model.
The calculated decay rates for p-Si are similar to those of a-Si. No modes in
p-Si reside entirely on the crystalline cluster, decoupled from the amorphous
matrix. The localized modes with the largest (up to 59%) weight on the cluster
decay primarily to two diffusons. The numerical results are discussed in
relation to a recent suggestion by van der Voort et al. [Phys. Rev. B {\bf 62},
8072 (2000)] that long vibrational relaxation inferred experimentally may be
due to possible crystalline nanostructures in some types of a-Si.Comment: 9 two-column pages, 13 figure
Significance Level and the Strength of Test Shift Through the Finite Rate of the Transient Response
ΠΠΎΡΡΡΠΏΠΈΠ»Π°: 12.10.2022. ΠΡΠΈΠ½ΡΡΠ° Π² ΠΏΠ΅ΡΠ°ΡΡ: 14.11.2022.Received: 12.10.2022. Accepted: 14.11.2022.ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ ΡΠΌΠ΅ΡΠ΅Π½ΠΈΡ ΡΡΠΎΠ²Π½Ρ Π·Π½Π°ΡΠΈΠΌΠΎΡΡΠΈ ΠΈ ΠΌΠΎΡΠ½ΠΎΡΡΠΈ ΠΊΡΠΈΡΠ΅ΡΠΈΡ, ΠΊΠΎΠ³Π΄Π° ΠΏΡΠΈ ΠΏΡΠΎΠ²Π΅ΡΠΊΠ΅ ΡΡΠ°ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
Π³ΠΈΠΏΠΎΡΠ΅Π· Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΏΡΠ°Π²ΠΈΠ»Π° ΠΠ΅ΠΉΠΌΠ°Π½Π° β ΠΠΈΡΡΠΎΠ½Π° Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΌΠΎΠ΄Π΅Π»ΠΈ ΠΏΠ΅ΡΠ΅Ρ
ΠΎΠ΄Π½ΠΎΠΉ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ Π»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΡ
Π΅ΠΌΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ ΠΏΡΠΎΡΡΠ°Ρ ΡΡΠ½ΠΊΡΠΈΡ ΠΎΡΠΈΠ±ΠΎΠΊ. Π‘ΠΌΠ΅ΡΠ΅Π½ΠΈΡ ΡΠ°ΡΡΡΠΈΡΠ°Π½Ρ Π΄Π»Ρ ΡΡΠ»Π΅Π΅Π²ΡΠΊΠΈΡ
ΡΡΠ½ΠΊΡΠΈΠΉ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ. Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΈΠ· Π²Π°ΡΡΠΈΡΡΠ΅ΠΌΡΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ ΠΎΠ±ΠΎΠ±ΡΠ΅Π½Π½ΠΎΠ΅ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠ΅ ΡΠΈΠ³Π½Π°Π»-ΠΏΠΎΠΌΠ΅Ρ
Π°.A significance level and the strength of test shifts are studied then the error function as a transient response model of logical gate is used for testing of statistical hypothesis with Neumann-Pearson criterion. Shifts are rated for Rayleigh accumulated distributions. The generalized signalto-noise ratio is used as one of the variable parameters. The paper reveals that the finite slope of the transient response curve of logical gate results in a type I error increase. The significance level lock leads to bottom of critical region increase and the strength of test decrease in return. The twofold increase of the slope of the transient response curve leads to both the type I error and the bottom of critical region and the strength of test shifts decrease about 12 dB. The twofold increase of generalized signal-to-noise ratio causes the rise of the maximum displacement of a test power functions more than 3 dB up. As this takes place the extremum abscissa is diminished
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