title: Ð¡Ð¸Ð½Ñ ÑÐ¾ÑÐ¸Ð³Ð½Ð°Ð» Ð´Ð»Ñ Ð³Ð¸Ð´ÑÐ¾Ð°ÐºÑÑÑÐ¸ÑÐµÑÐºÐ¾Ð¹ Ð¿Ð¾Ð´Ð²Ð¾Ð´Ð½Ð¾Ð¹ ÑÐ²ÑÐ·Ð¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Synchro signal for underwater acoustic communications
Creators: name: Ð¥ÑÐº Ð¢Ñ Ð°Ð½Ñ ÐÐ°Ð½Ð³
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: ÐÐ§Ð-ÑÐ¸Ð³Ð½Ð°Ð»
ÐÐ§Ð-ÑÐ¸Ð³Ð½Ð°Ð»
ÐºÑÐ¸Ð²ÑÐµ Ð²ÐµÑÐ¾ÑÑÐ½Ð¾ÑÑÐ¸ Ð»Ð¾Ð¶Ð½Ð¾Ð¹ ÑÑÐµÐ²Ð¾Ð³Ð¸
ÐºÑÐ¸Ð²ÑÐµ Ð²ÐµÑÐ¾ÑÑÐ½Ð¾ÑÑÐ¸ Ð¿ÑÐ°Ð²Ð¸Ð»ÑÐ½Ð¾Ð³Ð¾ Ð¾Ð±Ð½Ð°ÑÑÐ¶ÐµÐ½Ð¸Ñ
ÑÑÑÐµÐºÑ ÐÐ¾Ð¿Ð»ÐµÑÐ°
Ð²ÑÐµÐ¼ÐµÐ½Ð½Ð°Ñ ÑÐ¸Ð½Ñ ÑÐ¾Ð½Ð¸Ð·Ð°ÑÐ¸Ñ
ÑÐ°ÑÑÐ¾ÑÐ½ÑÐ¹ ÑÐ´Ð²Ð¸Ð³
LFM signal
HFM signal
Probability of false alarm
Probability of true detection
Doppler effect
Timing synchronization
Frequency shift

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° ÑÑÐ°Ð²Ð½ÐµÐ½Ð¸Ñ Ð¿ÑÐµÐ°Ð¼Ð±ÑÐ» Ð´Ð»Ñ Ð¾Ð±Ð½Ð°ÑÑÐ¶ÐµÐ½Ð¸Ñ ÑÐ¸Ð³Ð½Ð°Ð»Ð¾Ð² Ð² Ð³Ð¸Ð´ÑÐ¾Ð°ÐºÑÑÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÑÐ²ÑÐ·Ð¸. ÐÐ»Ð°Ð²Ð½Ð¾Ð¹ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÑÑ Ð¿Ð¾Ð´Ð²Ð¾Ð´Ð½Ð¾Ð³Ð¾ Ð°ÐºÑÑÑÐ¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÐºÐ°Ð½Ð°Ð»Ð° ÑÐ²Ð»ÑÐµÑÑÑ ÑÐ¸Ð»ÑÐ½Ð¾Ðµ Ð²Ð»Ð¸ÑÐ½Ð¸Ðµ ÑÑÑÐµÐºÑÐ° ÐÐ¾Ð¿Ð»ÐµÑÐ°. Ð­ÑÐ¾ ÑÐ²ÑÐ·Ð°Ð½Ð¾ Ñ ÑÐµÐ¼, ÑÑÐ¾ Ð¼Ð¸Ð½Ð¸Ð¼Ð°Ð»ÑÐ½Ð°Ñ Ð¸ Ð¼Ð°ÐºÑÐ¸Ð¼Ð°Ð»ÑÐ½Ð°Ñ ÑÐ°ÑÑÐ¾ÑÑ Ð¿Ð¾Ð»Ð¾ÑÑ Ð¿ÑÐ¾Ð¿ÑÑÐºÐ°Ð½Ð¸Ñ Ð³Ð¸Ð´ÑÐ¾Ð°ÐºÑÑÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ñ Ð¼Ð¾Ð³ÑÑ Ð¾ÑÐ»Ð¸ÑÐ°ÑÑÑÑ Ð¾Ñ Ð½ÐµÑÐºÐ¾Ð»ÑÐºÐ¸Ñ Ð´ÐµÑÑÑÐºÐ¾Ð² Ð¿ÑÐ¾ÑÐµÐ½ÑÐ¾Ð² Ð´Ð¾ Ð½ÐµÑÐºÐ¾Ð»ÑÐºÐ¸Ñ ÑÐ¾ÑÐµÐ½ Ð¿ÑÐ¾ÑÐµÐ½ÑÐ¾Ð², Ð¿Ð¾ÑÑÐ¾Ð¼Ñ Ð¿ÐµÑÐµÐ´Ð°Ð²Ð°ÐµÐ¼ÑÐ¹ ÑÐ¸Ð³Ð½Ð°Ð» ÑÑÑÐ°Ð´Ð°ÐµÑ Ð¾Ñ ÑÐ°ÑÑÐ¾ÑÐ½Ð¾-Ð·Ð°Ð²Ð¸ÑÐ¸Ð¼Ð¾Ð³Ð¾ Ð´Ð¾Ð¿Ð»ÐµÑÐ¾Ð²ÑÐºÐ¾Ð³Ð¾ ÑÐ´Ð²Ð¸Ð³Ð° ÑÐ°ÑÑÐ¾ÑÑ. Ð ÑÐ°Ð±Ð¾ÑÐµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ñ Ð²Ð°ÑÐ¸Ð°Ð½ÑÑ Ð¿ÑÐµÐ°Ð¼Ð±ÑÐ»Ñ Ð¾Ð±Ð½Ð°ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð¸ ÑÐ¸Ð½ÑÑÐ¾Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ ÑÐ¸Ð³Ð½Ð°Ð»Ð° Ñ Ð»Ð¸Ð½ÐµÐ¹Ð½Ð¾Ð¹ ÑÐ°ÑÑÐ¾ÑÐ½Ð¾Ð¹ Ð¼Ð¾Ð´ÑÐ»ÑÑÐ¸ÐµÐ¹ (ÐÐ§Ð â Linear Frequency Modulated Waveform (LFM) â Ð¿Ð¾ Ð°Ð½Ð³Ð».) Ð¸ ÑÐ¸Ð³Ð½Ð°Ð»Ð° Ñ Ð³Ð¸Ð¿ÐµÑÐ±Ð¾Ð»Ð¸ÑÐµÑÐºÐ¾Ð¹ ÑÐ°ÑÑÐ¾ÑÐ½Ð¾Ð¹ Ð¼Ð¾Ð´ÑÐ»ÑÑÐ¸ÐµÐ¹ (ÐÐ§Ð â Hyperbolic Frequency Modulated Waveform (HFM) â Ð¿Ð¾ Ð°Ð½Ð³Ð».). ÐÐ¾ÑÑÑÐ¾ÐµÐ½Ñ ÐºÑÐ¸Ð²ÑÐµ Ð²ÐµÑÐ¾ÑÑÐ½Ð¾ÑÑÐ¸ Ð»Ð¾Ð¶Ð½Ð¾Ð¹ ÑÑÐµÐ²Ð¾Ð³Ð¸ Ð¸ ÐºÑÐ¸Ð²ÑÐµ Ð²ÐµÑÐ¾ÑÑÐ½Ð¾ÑÑÐ¸ Ð¿ÑÐ°Ð²Ð¸Ð»ÑÐ½Ð¾Ð³Ð¾ Ð¾Ð±Ð½Ð°ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð´Ð»Ñ ÑÐ°Ð·Ð½ÑÑ Ð·Ð½Ð°ÑÐµÐ½Ð¸Ð¹ Ð´Ð¾Ð¿Ð»ÐµÑÐ¾Ð²ÑÐºÐ¾Ð¹ ÑÐºÐ°Ð»Ñ, Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ð¸ ÐºÐ¾ÑÐ¾ÑÑÑ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¾ ÑÑÐ°Ð²Ð½ÐµÐ½Ð¸Ðµ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¾Ð² ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ ÑÐ¸ÑÑÐµÐ¼Ñ Ð²ÑÐµÐ¼ÐµÐ½Ð½Ð¾Ð¹ ÑÐ¸Ð½ÑÑÐ¾Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¸ Ð¾ÑÐµÐ½ÐºÐ¸ Ð´Ð¾Ð¿Ð»ÐµÑÐ¾Ð²ÑÐºÐ¾Ð³Ð¾ ÑÐ´Ð²Ð¸Ð³Ð° Ð´Ð»Ñ Ð³Ð¸Ð´ÑÐ¾Ð°ÐºÑÑÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÑÐ²ÑÐ·Ð¸ Ð¿ÑÐ¸ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ð¸ ÐÐ§Ð- Ð¸ ÐÐ§Ð-ÑÐ¸Ð³Ð½Ð°Ð»Ð¾Ð². ÐÑÐ¸ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ð¸ ÑÑÐ°ÑÐ¸Ð¾Ð½Ð°ÑÐ½Ð¾Ð³Ð¾ Ð¸ Ð´Ð²Ð¸Ð¶ÑÑÐµÐ³Ð¾ÑÑ Ð¿ÐµÑÐµÐ´Ð°ÑÑÐ¸ÐºÐ° Ð¸ Ð¿ÑÐ¸ÐµÐ¼Ð½Ð¸ÐºÐ° Ð² Ð¿Ð¾Ð´Ð²Ð¾Ð´Ð½Ð¾Ð¼ Ð°ÐºÑÑÑÐ¸ÑÐµÑÐºÐ¾Ð¼ ÐºÐ°Ð½Ð°Ð»Ðµ Ð¿Ð¾ÐºÐ°Ð·Ð°Ð½Ð¾, ÑÑÐ¾ ÐÐ§Ð-ÑÐ¸Ð³Ð½Ð°Ð» Ð¾Ð±ÐµÑÐ¿ÐµÑÐ¸Ð²Ð°ÐµÑ Ð½Ð°Ð¸Ð»ÑÑÑÑÑ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÑ Ð² ÐºÐ°ÑÐµÑÑÐ²Ðµ Ð¾Ð±Ð½Ð°ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð¸ ÑÐ¸Ð½ÑÑÐ¾Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸.
description: This paper is devoted to the comparison of preambles for signal detection in underwater acoustic communication. The main feature of the underwater acoustic channel (UWA channel) is the strong influence of the Doppler effect on transmitted signals. This is because the lowest and the highest frequencies of the underwater acoustic system bandwidth can differ from several tens percent to several hundred percent so the transmitted signal suffers from frequency dependent Doppler frequency shift. In this paper, we investigated linear frequency modulated (LFM) and hyperbolic frequency modulated (HFM) preambles for the signal detection in underwater acoustic communications. All signal types have good autocorrelation properties and they can effectively resist the influence of the Doppler effect. The probability curves of false alarm and the probability curves of true detection are constructed for different values of the Doppler scale, on the basis of which the results of the effectiveness of the system are compared when using LFM- and HFM-signals. When modeling stationary and moving transmitter and receiver in the UWA channel, it is shown that HFM signal as preamble provides the best performance in timing and Doppler synchronization.