CASPIAN JOURNAL

MANAGEMENT AND HIGH TECHNOLOGIES

FEATURES OF SYNCHRONIZATION OF GENERATORS OF ACERIODIC PSEUDORANDOM SEQUENCES IN WIDESBAND AND CDMA COMMUNICATION SYSTEMS

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Azhmukhamedov Iskandar M., Melnikov Evgeny V., Podoltsev Viktor V. FEATURES OF SYNCHRONIZATION OF GENERATORS OF ACERIODIC PSEUDORANDOM SEQUENCES IN WIDESBAND AND CDMA COMMUNICATION SYSTEMS // Caspian journal : management and high technologies. — 2019. — №4. — pp. 35-42.

Azhmukhamedov Iskandar M. - Doct. Sci. (Engineering), Professor, Head of the Department of Information Security, Astrakhan State University, 20Р° Tatishchev St., Astrakhan, 414056, Russian Federation, iskander_agm@mail.ru

Melnikov Evgeny V. - graduate student, Astrakhan State Technical University, 16 Tatishchev St., Astrakhan, 414056, Russian Federation, melnikov@magnit.ru

Podoltsev Viktor V. - graduate student, Astrakhan State Technical University, 16 Tatishchev St., Astrakhan, 414056, Russian Federation, pvv_001@mail.ru

The article substantiates the objective prerequisites for the active development of broadband communication systems and communication systems using Code Division Multiple Access (CDMA) in the Russian Federation and abroad, the place of these systems in the telecommunications sector. The main advantages of such systems in the presence of powerful interference from a natural and organized structure and the prospects for their distribution around the world are indicated. Methods of generating noise-like signals in the broadband communication systems and CDMA are indicated based on the use of aperiodic pseudorandom sequences, with the help of which the frequency band is expanded for transmitting signal information packets. The features of synchronization of aperiodic pseudorandom sequence generators in such systems under natural and organized interference are analyzed in detail. It is shown that the existing analytical estimates of aperiodic pseudorandom sequence synchronization were primarily developed for channels of good enough and satisfactory quality and therefore can not be fully used in broadband communication systems and CDMA systems, which are designed to work on low quality channels. The main parameters for evaluating the efficiency of synchronization of aperiodic pseudorandom sequence sensors in communication systems of broadband communication systems and CDMA are indicated.

Key words: апериодическая псевдослучайная последовательность, широкополосная связь, шумоподобный сигнал, синхронизация, организованные помехи, мультидоступ с кодовым разделением каналов, система связи CDMA, aperiodic pseudorandom sequence, broadband communication, n