40 research outputs found
Π£ΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΡ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Ρ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠΏΠ΅ΠΊΡΡΠ° Π² ΡΠΈΡΡΠ΅ΠΌΠ°Ρ ΡΠΈΠ½Ρ ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ ΡΠ°Π΄ΠΈΠΎΡΠ΅Ρ Π½ΠΈΡΠ΅ΡΠΊΠΈΡ ΡΠΈΡΡΠ΅ΠΌ
The issues of ensuring the stability of delay tracking in synchronization systems of radio engineering systems when receiving phase-shift keyed signals with spectrum expansion based on pseudorandom sequences are considered. When working with moving objects, the delay of the received signal continuously changes, synchronization errors occur, and the quality of signal reception largely depends on the stability of the tracking scheme for the delay, characterized by the probability of tracking failure. Delay tracking is usually considered as the main task of the synchronization system of the considered radio systems with phase-manipulated signals with spectrum expansion based on pseudo-random sequences.
The effect of synchronization errors when tracking the delay of a received phase-shift keyed signal with a spectrum extension based on pseudorandom sequences on the probability of tracking failure is studied. The calculation method is used to obtain families of dependences of the probability of tracking failure on the values of random and systematic components of the delay tracking error, normalized to the capture band of the time discriminator of the delay tracking scheme for various combinations of these parameters. The areas of weak and strong influence of the value of tracking errors over the delay of the received signal on the probability of tracking failure are determined. The nature of impact of random and systematic components of tracking error on the probability of failure of tracking was analyzed and it was found that in the General case is the ambiguity of normalized mean square of tracking error as the optimization criterion while minimizing the likelihood of tracking loss.
Calculations performed for a wide range of changes in the normalized delay tracking errors show that to ensure a given quality of signal reception in a radio system with phase-shift keyed signals with spectrum expansion based on pseudorandom sequences, a joint choice of parameters of the delay tracking system that determine the value of random and systematic components of the tracking error is necessary. The results obtained can be used to analyze the characteristics of synchronization systems that monitor the parameters of received signals with a spectrum extension, and to justify the technical solutions of the synchronization system that provide the required quality of signal reception in information and measurement of radio-electronic systems.Π Π°ΡΡΠΌΠΎΡΡΠΈΠ²Π°ΡΡΡΡ Π²ΠΎΠΏΡΠΎΡΡ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΡ ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΠΈ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ Π² ΡΠΈΡΡΠ΅ΠΌΠ°Ρ
ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ ΡΠ°Π΄ΠΈΠΎΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΈΡΡΠ΅ΠΌ ΠΏΡΠΈ ΠΏΡΠΈΠ΅ΠΌΠ΅ ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Ρ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠΏΠ΅ΠΊΡΡΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΡΠ΅Π²Π΄ΠΎΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΠ΅ΠΉ. ΠΡΠΈ ΡΠ°Π±ΠΎΡΠ΅ Ρ ΠΏΠΎΠ΄Π²ΠΈΠΆΠ½ΡΠΌΠΈ ΠΎΠ±ΡΠ΅ΠΊΡΠ°ΠΌΠΈ Π·Π°Π΄Π΅ΡΠΆΠΊΠ° ΠΏΡΠΈΠ½ΠΈΠΌΠ°Π΅ΠΌΠΎΠ³ΠΎ ΡΠΈΠ³Π½Π°Π»Π° Π½Π΅ΠΏΡΠ΅ΡΡΠ²Π½ΠΎ ΠΌΠ΅Π½ΡΠ΅ΡΡΡ, Π²ΠΎΠ·Π½ΠΈΠΊΠ°ΡΡ ΠΎΡΠΈΠ±ΠΊΠΈ ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ, ΠΈ ΠΊΠ°ΡΠ΅ΡΡΠ²ΠΎ ΠΏΡΠΈΠ΅ΠΌΠ° ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Π² Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΡΡΠ΅ΠΏΠ΅Π½ΠΈ Π·Π°Π²ΠΈΡΠΈΡ ΠΎΡ ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΠΈ ΡΠ°Π±ΠΎΡΡ ΡΡ
Π΅ΠΌΡ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ, Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΠ΅ΠΌΠΎΠΉ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΡΡ ΡΡΡΠ²Π° ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ. Π‘Π»Π΅ΠΆΠ΅Π½ΠΈΠ΅ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ, ΠΊΠ°ΠΊ ΠΏΡΠ°Π²ΠΈΠ»ΠΎ, ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΎΡΠ½ΠΎΠ²Π½ΠΎΠΉ Π·Π°Π΄Π°ΡΠΈ ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ ΡΠ°Π΄ΠΈΠΎΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΈΡΡΠ΅ΠΌ Ρ ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΠΌΠΈ ΡΠΈΠ³Π½Π°Π»Π°ΠΌΠΈ Ρ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠΏΠ΅ΠΊΡΡΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΡΠ΅Π²Π΄ΠΎΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΠ΅ΠΉ.
ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΎΡΠΈΠ±ΠΎΠΊ ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ ΠΏΡΠΈ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΠΈ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ ΠΏΡΠΈΠ½ΠΈΠΌΠ°Π΅ΠΌΠΎΠ³ΠΎ ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΡΠΈΠ³Π½Π°Π»Π° Ρ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠΏΠ΅ΠΊΡΡΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΡΠ΅Π²Π΄ΠΎΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΠ΅ΠΉ Π½Π° Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΡ ΡΡΡΠ²Π° ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ. Π Π°ΡΡΠ΅ΡΠ½ΡΠΌ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΏΠΎΠ»ΡΡΠ΅Π½Ρ ΡΠ΅ΠΌΠ΅ΠΉΡΡΠ²Π° Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠ΅ΠΉ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠΈ ΡΡΡΠ²Π° ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ ΠΎΡ Π²Π΅Π»ΠΈΡΠΈΠ½ ΡΠ»ΡΡΠ°ΠΉΠ½ΠΎΠΉ ΠΈ ΡΠΈΡΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΡ
ΠΎΡΠΈΠ±ΠΊΠΈ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ, Π½ΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΊ ΠΏΠΎΠ»ΠΎΡΠ΅ Π·Π°Ρ
Π²Π°ΡΠ° Π²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ Π΄ΠΈΡΠΊΡΠΈΠΌΠΈΠ½Π°ΡΠΎΡΠ°, ΠΏΡΠΈ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΡΠΎΡΠ΅ΡΠ°Π½ΠΈΡΡ
ΡΡΠΈΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ². ΠΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Ρ ΠΎΠ±Π»Π°ΡΡΠΈ ΡΠ»Π°Π±ΠΎΠ³ΠΎ ΠΈ ΡΠΈΠ»ΡΠ½ΠΎΠ³ΠΎ Π²Π»ΠΈΡΠ½ΠΈΡ Π²Π΅Π»ΠΈΡΠΈΠ½Ρ ΠΎΡΠΈΠ±ΠΎΠΊ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ ΠΏΡΠΈΠ½ΠΈΠΌΠ°Π΅ΠΌΠΎΠ³ΠΎ ΡΠΈΠ³Π½Π°Π»Π° Π½Π° Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΡ ΡΡΡΠ²Π° ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ. ΠΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½ Ρ
Π°ΡΠ°ΠΊΡΠ΅Ρ Π²Π»ΠΈΡΠ½ΠΈΡ ΡΠ»ΡΡΠ°ΠΉΠ½ΠΎΠΉ ΠΈ ΡΠΈΡΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΡ
ΠΎΡΠΈΠ±ΠΊΠΈ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ Π½Π° Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΡ ΡΡΡΠ²Π° ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π² ΠΎΠ±ΡΠ΅ΠΌ ΡΠ»ΡΡΠ°Π΅ ΠΈΠΌΠ΅Π΅Ρ ΠΌΠ΅ΡΡΠΎ Π½Π΅ΠΎΠ΄Π½ΠΎΠ·Π½Π°ΡΠ½ΠΎΡΡΡ ΡΡΠ΅Π΄Π½Π΅Π³ΠΎ ΠΊΠ²Π°Π΄ΡΠ°ΡΠ° Π½ΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ ΠΎΡΠΈΠ±ΠΊΠΈ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ ΠΊΠ°ΠΊ ΠΊΡΠΈΡΠ΅ΡΠΈΡ ΠΎΠΏΡΠΈΠΌΠΈΠ·Π°ΡΠΈΠΈ ΠΏΡΠΈ Π²ΡΠ±ΠΎΡΠ΅ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΡΠΈΡΡΠ΅ΠΌΡ ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ.
Π Π°ΡΡΠ΅ΡΡ, ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π½ΡΠ΅ Π΄Π»Ρ ΡΠΈΡΠΎΠΊΠΎΠ³ΠΎ Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π° ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Π½ΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΎΡΠΈΠ±ΠΎΠΊ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ, ΠΏΠΎΠΊΠ°Π·ΡΠ²Π°ΡΡ, ΡΡΠΎ Π΄Π»Ρ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΡ Π·Π°Π΄Π°Π½Π½ΠΎΠ³ΠΎ ΠΊΠ°ΡΠ΅ΡΡΠ²Π° ΠΏΡΠΈΠ΅ΠΌΠ° ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Π² ΡΠ°Π΄ΠΈΠΎΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΠ΅ Ρ ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΠΌΠΈ ΡΠΈΠ³Π½Π°Π»Π°ΠΌΠΈ Ρ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠΏΠ΅ΠΊΡΡΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΡΠ΅Π²Π΄ΠΎΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΠ΅ΠΉ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌ ΡΠΎΠ²ΠΌΠ΅ΡΡΠ½ΡΠΉ Π²ΡΠ±ΠΎΡ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΡΠΈΡΡΠ΅ΠΌΡ ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ, ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΡΡΠΈΡ
Π²Π΅Π»ΠΈΡΠΈΠ½Ρ ΡΠ»ΡΡΠ°ΠΉΠ½ΠΎΠΉ ΠΈ ΡΠΈΡΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΡ
ΠΎΡΠΈΠ±ΠΊΠΈ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ. ΠΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Ρ ΠΏΡΠΈ Π°Π½Π°Π»ΠΈΠ·Π΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΡΠΈΡΡΠ΅ΠΌ ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΈ ΠΈΠ·ΠΌΠ΅ΡΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΡΠ°Π΄ΠΈΠΎΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΈΡΡΠ΅ΠΌ ΠΈ ΠΏΡΠΈ ΠΎΠ±ΠΎΡΠ½ΠΎΠ²Π°Π½ΠΈΠΈ ΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ΅ΡΠ΅Π½ΠΈΠΉ, ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠΈΠ²Π°ΡΡΠΈΡ
ΡΡΠ΅Π±ΡΠ΅ΠΌΠΎΠ΅ ΠΊΠ°ΡΠ΅ΡΡΠ²ΠΎ ΠΏΡΠΈΠ΅ΠΌΠ° ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Ρ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠΏΠ΅ΠΊΡΡΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΡΠ΅Π²Π΄ΠΎΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΠ΅ΠΉ
Π£ΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΡ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Ρ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠΏΠ΅ΠΊΡΡΠ° Π² ΡΠΈΡΡΠ΅ΠΌΠ°Ρ ΡΠΈΠ½Ρ ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ ΡΠ°Π΄ΠΈΠΎΡΠ΅Ρ Π½ΠΈΡΠ΅ΡΠΊΠΈΡ ΡΠΈΡΡΠ΅ΠΌ
Π Π°ΡΡΠΌΠΎΡΡΠΈΠ²Π°ΡΡΡΡ Π²ΠΎΠΏΡΠΎΡΡ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΡ ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΠΈ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ Π² ΡΠΈΡΡΠ΅ΠΌΠ°Ρ
ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ ΡΠ°Π΄ΠΈΠΎΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΈΡΡΠ΅ΠΌ ΠΏΡΠΈ ΠΏΡΠΈΠ΅ΠΌΠ΅ ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Ρ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠΏΠ΅ΠΊΡΡΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΡΠ΅Π²Π΄ΠΎΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΠ΅ΠΉ. ΠΡΠΈ ΡΠ°Π±ΠΎΡΠ΅ Ρ ΠΏΠΎΠ΄Π²ΠΈΠΆΠ½ΡΠΌΠΈ ΠΎΠ±ΡΠ΅ΠΊΡΠ°ΠΌΠΈ Π·Π°Π΄Π΅ΡΠΆΠΊΠ° ΠΏΡΠΈΠ½ΠΈΠΌΠ°Π΅ΠΌΠΎΠ³ΠΎ ΡΠΈΠ³Π½Π°Π»Π° Π½Π΅ΠΏΡΠ΅ΡΡΠ²Π½ΠΎ ΠΌΠ΅Π½ΡΠ΅ΡΡΡ, Π²ΠΎΠ·Π½ΠΈΠΊΠ°ΡΡ ΠΎΡΠΈΠ±ΠΊΠΈ ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ, ΠΈ ΠΊΠ°ΡΠ΅ΡΡΠ²ΠΎ ΠΏΡΠΈΠ΅ΠΌΠ° ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Π² Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΡΡΠ΅ΠΏΠ΅Π½ΠΈ Π·Π°Π²ΠΈΡΠΈΡ ΠΎΡ ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΠΈ ΡΠ°Π±ΠΎΡΡ ΡΡ
Π΅ΠΌΡ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ, Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΠ΅ΠΌΠΎΠΉ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΡΡ ΡΡΡΠ²Π° ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ. Π‘Π»Π΅ΠΆΠ΅Π½ΠΈΠ΅ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ, ΠΊΠ°ΠΊ ΠΏΡΠ°Π²ΠΈΠ»ΠΎ, ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΎΡΠ½ΠΎΠ²Π½ΠΎΠΉ Π·Π°Π΄Π°ΡΠΈ ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ ΡΠ°Π΄ΠΈΠΎΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΈΡΡΠ΅ΠΌ Ρ ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΠΌΠΈ ΡΠΈΠ³Π½Π°Π»Π°ΠΌΠΈ Ρ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠΏΠ΅ΠΊΡΡΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΡΠ΅Π²Π΄ΠΎΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΠ΅ΠΉ.
ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΎΡΠΈΠ±ΠΎΠΊ ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ ΠΏΡΠΈ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΠΈ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ ΠΏΡΠΈΠ½ΠΈΠΌΠ°Π΅ΠΌΠΎΠ³ΠΎ ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΡΠΈΠ³Π½Π°Π»Π° Ρ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠΏΠ΅ΠΊΡΡΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΡΠ΅Π²Π΄ΠΎΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΠ΅ΠΉ Π½Π° Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΡ ΡΡΡΠ²Π° ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ. Π Π°ΡΡΠ΅ΡΠ½ΡΠΌ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΏΠΎΠ»ΡΡΠ΅Π½Ρ ΡΠ΅ΠΌΠ΅ΠΉΡΡΠ²Π° Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠ΅ΠΉ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠΈ ΡΡΡΠ²Π° ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ ΠΎΡ Π²Π΅Π»ΠΈΡΠΈΠ½ ΡΠ»ΡΡΠ°ΠΉΠ½ΠΎΠΉ ΠΈ ΡΠΈΡΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΡ
ΠΎΡΠΈΠ±ΠΊΠΈ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ, Π½ΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΊ ΠΏΠΎΠ»ΠΎΡΠ΅ Π·Π°Ρ
Π²Π°ΡΠ° Π²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ Π΄ΠΈΡΠΊΡΠΈΠΌΠΈΠ½Π°ΡΠΎΡΠ°, ΠΏΡΠΈ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΡΠΎΡΠ΅ΡΠ°Π½ΠΈΡΡ
ΡΡΠΈΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ². ΠΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Ρ ΠΎΠ±Π»Π°ΡΡΠΈ ΡΠ»Π°Π±ΠΎΠ³ΠΎ ΠΈ ΡΠΈΠ»ΡΠ½ΠΎΠ³ΠΎ Π²Π»ΠΈΡΠ½ΠΈΡ Π²Π΅Π»ΠΈΡΠΈΠ½Ρ ΠΎΡΠΈΠ±ΠΎΠΊ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ ΠΏΡΠΈΠ½ΠΈΠΌΠ°Π΅ΠΌΠΎΠ³ΠΎ ΡΠΈΠ³Π½Π°Π»Π° Π½Π° Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΡ ΡΡΡΠ²Π° ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ. ΠΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½ Ρ
Π°ΡΠ°ΠΊΡΠ΅Ρ Π²Π»ΠΈΡΠ½ΠΈΡ ΡΠ»ΡΡΠ°ΠΉΠ½ΠΎΠΉ ΠΈ ΡΠΈΡΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΡ
ΠΎΡΠΈΠ±ΠΊΠΈ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ Π½Π° Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΡ ΡΡΡΠ²Π° ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π² ΠΎΠ±ΡΠ΅ΠΌ ΡΠ»ΡΡΠ°Π΅ ΠΈΠΌΠ΅Π΅Ρ ΠΌΠ΅ΡΡΠΎ Π½Π΅ΠΎΠ΄Π½ΠΎΠ·Π½Π°ΡΠ½ΠΎΡΡΡ ΡΡΠ΅Π΄Π½Π΅Π³ΠΎ ΠΊΠ²Π°Π΄ΡΠ°ΡΠ° Π½ΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ ΠΎΡΠΈΠ±ΠΊΠΈ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ ΠΊΠ°ΠΊ ΠΊΡΠΈΡΠ΅ΡΠΈΡ ΠΎΠΏΡΠΈΠΌΠΈΠ·Π°ΡΠΈΠΈ ΠΏΡΠΈ Π²ΡΠ±ΠΎΡΠ΅ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΡΠΈΡΡΠ΅ΠΌΡ ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ.
Π Π°ΡΡΠ΅ΡΡ, ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π½ΡΠ΅ Π΄Π»Ρ ΡΠΈΡΠΎΠΊΠΎΠ³ΠΎ Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π° ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Π½ΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΎΡΠΈΠ±ΠΎΠΊ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ, ΠΏΠΎΠΊΠ°Π·ΡΠ²Π°ΡΡ, ΡΡΠΎ Π΄Π»Ρ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΡ Π·Π°Π΄Π°Π½Π½ΠΎΠ³ΠΎ ΠΊΠ°ΡΠ΅ΡΡΠ²Π° ΠΏΡΠΈΠ΅ΠΌΠ° ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Π² ΡΠ°Π΄ΠΈΠΎΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΠ΅ Ρ ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΠΌΠΈ ΡΠΈΠ³Π½Π°Π»Π°ΠΌΠΈ Ρ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠΏΠ΅ΠΊΡΡΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΡΠ΅Π²Π΄ΠΎΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΠ΅ΠΉ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌ ΡΠΎΠ²ΠΌΠ΅ΡΡΠ½ΡΠΉ Π²ΡΠ±ΠΎΡ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΡΠΈΡΡΠ΅ΠΌΡ ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ, ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΡΡΠΈΡ
Π²Π΅Π»ΠΈΡΠΈΠ½Ρ ΡΠ»ΡΡΠ°ΠΉΠ½ΠΎΠΉ ΠΈ ΡΠΈΡΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΡ
ΠΎΡΠΈΠ±ΠΊΠΈ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ. ΠΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Ρ ΠΏΡΠΈ Π°Π½Π°Π»ΠΈΠ·Π΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΡΠΈΡΡΠ΅ΠΌ ΡΠΈΠ½Ρ
ΡΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΈ ΠΈΠ·ΠΌΠ΅ΡΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΡΠ°Π΄ΠΈΠΎΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΈΡΡΠ΅ΠΌ ΠΈ ΠΏΡΠΈ ΠΎΠ±ΠΎΡΠ½ΠΎΠ²Π°Π½ΠΈΠΈ ΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ΅ΡΠ΅Π½ΠΈΠΉ, ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠΈΠ²Π°ΡΡΠΈΡ
ΡΡΠ΅Π±ΡΠ΅ΠΌΠΎΠ΅ ΠΊΠ°ΡΠ΅ΡΡΠ²ΠΎ ΠΏΡΠΈΠ΅ΠΌΠ° ΡΠ°Π·ΠΎΠΌΠ°Π½ΠΈΠΏΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Ρ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠΏΠ΅ΠΊΡΡΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΡΠ΅Π²Π΄ΠΎΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ
ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΠ΅ΠΉ
TDRSS telecommunications study. Phase 1: Final report
A parametric analysis of the telecommunications support capability of the Tracking and Data Relay Satellite System (TDRSS) was performed. Emphasis was placed on maximizing support capability provided to the user while minimizing impact on the user spacecraft. This study evaluates the present TDRSS configuration as presented in the TDRSS Definition Phase Study Report, December 1973 to determine potential changes for improving the overall performance. In addition, it provides specifications of the user transponder equipment to be used in the TDRSS
Adaptive Interference Mitigation in GPS Receivers
Satellite navigation systems (GNSS) are among the most complex radio-navigation systems, providing positioning, navigation, and timing (PNT) information. A growing number of public sector and commercial applications rely on the GNSS PNT service to support business growth, technical development, and the day-to-day operation of technology and socioeconomic systems. As GNSS signals have inherent limitations, they are highly vulnerable to intentional and unintentional interference. GNSS signals have spectral power densities far below ambient thermal noise. Consequently, GNSS receivers must meet high standards of reliability and integrity to be used within a broad spectrum of applications. GNSS receivers must employ effective interference mitigation techniques to ensure robust, accurate, and reliable PNT service.
This research aims to evaluate the effectiveness of the Adaptive Notch Filter (ANF), a precorrelation mitigation technique that can be used to excise Continuous Wave Interference (CWI), hop-frequency and chirp-type interferences from GPS L1 signals. To mitigate unwanted interference, state-of-the-art ANFs typically adjust a single parameter, the notch centre frequency, and zeros are constrained extremely close to unity. Because of this, the notch centre frequency converges slowly to the target frequency. During this slow converge period, interference leaks into the acquisition block, thus sabotaging the operation of the acquisition block. Furthermore, if the CWI continuously hops within the GPS L1 in-band region, the subsequent interference frequency is locked onto after a delay, which means constant interference occurs in the receiver throughout the delay period. This research contributes to the field of interference mitigation at GNSS's receiver end using adaptive signal processing, predominately for GPS. This research can be divided into three stages.
I first designed, modelled and developed a Simulink-based GPS L1 signal simulator, providing a homogenous test signal for existing and proposed interference mitigation algorithms. Simulink-based GPS L1 signal simulator provided great flexibility to change various parameters to generate GPS L1 signal under different conditions, e.g. Doppler Shift, code phase delay and amount of propagation degradation. Furthermore, I modelled three acquisition schemes for GPS signals and tested GPS L1 signals acquisition via coherent and non-coherent integration methods.
As a next step, I modelled different types of interference signals precisely and implemented and evaluated existing adaptive notch filters in MATLAB in terms of Carrier to Noise Density (\u1d436/\u1d4410), Signal to Noise Ratio (SNR), Peak Degradation Metric, and Mean Square Error (MSE) at the output of the acquisition module in order to create benchmarks. Finally, I designed, developed and implemented a novel algorithm that simultaneously adapts both coefficients in lattice-based ANF. Mathematically, I derived the full-gradient term for the notch's bandwidth parameter adaptation and developed a framework for simultaneously adapting both coefficients of a lattice-based adaptive notch filter. I evaluated the performance of existing and proposed interference mitigation techniques under different types of interference signals. Moreover, I critically analysed different internal signals within the ANF structure in order to develop a new threshold parameter that resets the notch bandwidth at the start of each subsequent interference frequency. As a result, I further reduce the complexity of the structural implementation of lattice-based ANF, allowing for efficient hardware realisation and lower computational costs.
It is concluded from extensive simulation results that the proposed fully adaptive lattice-based provides better interference mitigation performance and superior convergence properties to target frequency compared to traditional ANF algorithms. It is demonstrated that by employing the proposed algorithm, a receiver is able to operate with a higher dynamic range of JNR than is possible with existing methods.
This research also presents the design and MATLAB implementation of a parameterisable Complex Adaptive Notch Filer (CANF). Present analysis on higher order CANF for detecting and mitigating various types of interference for complex baseband GPS L1 signals. In the end, further research was conducted to suppress interference in the GPS L1 signal by exploiting autocorrelation properties and discarding some portion of the main lobe of the GPS L1 signal. It is shown that by removing 30% spectrum of the main lobe, either from left, right, or centre, the GPS L1 signal is still acquirable
Deep Space Telecommunications Systems Engineering
Descriptive and analytical information useful for the optimal design, specification, and performance evaluation of deep space telecommunications systems is presented. Telemetry, tracking, and command systems, receiver design, spacecraft antennas, frequency selection, interference, and modulation techniques are addressed
Proceedings of the Second International Mobile Satellite Conference (IMSC 1990)
Presented here are the proceedings of the Second International Mobile Satellite Conference (IMSC), held June 17-20, 1990 in Ottawa, Canada. Topics covered include future mobile satellite communications concepts, aeronautical applications, modulation and coding, propagation and experimental systems, mobile terminal equipment, network architecture and control, regulatory and policy considerations, vehicle antennas, and speech compression
Proceedings of the Third International Mobile Satellite Conference (IMSC 1993)
Satellite-based mobile communications systems provide voice and data communications to users over a vast geographic area. The users may communicate via mobile or hand-held terminals, which may also provide access to terrestrial cellular communications services. While the first and second International Mobile Satellite Conferences (IMSC) mostly concentrated on technical advances, this Third IMSC also focuses on the increasing worldwide commercial activities in Mobile Satellite Services. Because of the large service areas provided by such systems, it is important to consider political and regulatory issues in addition to technical and user requirements issues. Topics covered include: the direct broadcast of audio programming from satellites; spacecraft technology; regulatory and policy considerations; advanced system concepts and analysis; propagation; and user requirements and applications
Comparative studies of conceptual design and qualification procedures for a Mars probe/lander. Volume V - Subsystem and technical analyses. Book 3 - Telecommunications, radar systems and power Final report
Telecommunication, electrical power and radar subsystem studies for Mars prob