title: ÐÐ»Ð³Ð¾ÑÐ¸ÑÐ¼Ñ ÑÐ°ÑÑÐ¾ÑÐ½Ð¾Ð¹ Ð¸ ÐºÐ°Ð´ÑÐ¾Ð²Ð¾Ð¹ ÑÐ¸Ð½Ñ ÑÐ¾Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸ ÑÐ¸Ð³Ð½Ð°Ð»Ð¾Ð² DVB-S2x Ð² ÑÐµÐ¶Ð¸Ð¼Ðµ ÑÐ²ÐµÑÑ Ð½Ð¸Ð·ÐºÐ¾Ð³Ð¾ Ð¾ÑÐ½Ð¾ÑÐµÐ½Ð¸Ñ ÑÐ¸Ð³Ð½Ð°Ð»-ÑÑÐ¼ Ð´Ð»Ñ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð² FPGA
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: Algorithms for frequency and frame synchronization of DVB-S2X signals in the very low signal to noise ratio mode for implementation in FPGA
Creators: name: ÐÐµÑÐµÑÐ¸Ð½ÑÐºÐ¸Ð¹, ÐÐ¸ÐºÑÐ¾Ñ
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: 2024
Subjects: ÑÑÐ°Ð½Ð´Ð°ÑÑ DVB-S2(X)
ÑÐµÐ¶Ð¸Ð¼ VL-SNR
MODCOD
Ð³ÑÑÐ±Ð°Ñ ÑÐ°ÑÑÐ¾ÑÐ½Ð°Ñ ÑÐ¸Ð½Ñ ÑÐ¾Ð½Ð¸Ð·Ð°ÑÐ¸Ñ
Ð²ÑÐµÐ¼ÐµÐ½Ð½Ð°Ñ ÑÐ¸Ð½Ñ ÑÐ¾Ð½Ð¸Ð·Ð°ÑÐ¸Ñ
ÐºÐ°Ð´ÑÐ¾Ð²Ð°Ñ ÑÐ¸Ð½Ñ ÑÐ¾Ð½Ð¸Ð·Ð°ÑÐ¸Ñ
ÑÐ¾ÑÐ½Ð°Ñ ÑÐ°ÑÑÐ¾ÑÐ½Ð°Ñ ÑÐ¸Ð½Ñ ÑÐ¾Ð½Ð¸Ð·Ð°ÑÐ¸Ñ
ÑÐ°Ð·Ð¾Ð²Ð°Ñ ÑÐ¸Ð½Ñ ÑÐ¾Ð½Ð¸Ð·Ð°ÑÐ¸Ñ
DVB-S2(X) standard
VL-SNR mode
coarse frequency synchronization
time synchronization
frame synchronization
precise frequency synchronization
phase synchronization

description: Ð¦ÐµÐ»Ñ ÑÐ°Ð±Ð¾ÑÑ â Ð°Ð½Ð°Ð»Ð¸Ð· Ð°Ð»Ð³Ð¾ÑÐ¸ÑÐ¼Ð¾Ð² Ð¿ÑÐ¸ÑÐ¼Ð° ÑÐ¸Ð³Ð½Ð°Ð»Ð¾Ð² ÑÐ¿ÑÑÐ½Ð¸ÐºÐ¾Ð²ÑÑ ÑÐ¸ÑÑÐµÐ¼ ÑÐ²ÑÐ·Ð¸, Ð´Ð»Ñ Ð¿Ð¾ÑÐ»ÐµÐ´ÑÑÑÐµÐ¹ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð² ÐÐÐÐ¡. Ð ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐµ ÑÐ°Ð±Ð¾ÑÑ Ð±ÑÐ»Ð¸ Ð¾Ð¿Ð¸ÑÐ°Ð½Ñ Ð°Ð»Ð³Ð¾ÑÐ¸ÑÐ¼Ñ Ð³ÑÑÐ±Ð¾Ð¹ ÑÐ°ÑÑÐ¾ÑÐ½Ð¾Ð¹, Ð²ÑÐµÐ¼ÐµÐ½Ð½Ð¾Ð¹, ÐºÐ°Ð´ÑÐ¾Ð²Ð¾Ð¹, ÑÐ¾ÑÐ½Ð¾Ð¹ ÑÐ°ÑÑÐ¾ÑÐ½Ð¾Ð¹ Ð¸ ÑÐ°Ð·Ð°Ð½Ð¾Ð²Ð¾Ð¹ ÑÐ¸Ð½ÑÑÐ¾Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸. ÐÐ»Ñ Ð°Ð»Ð³Ð¾ÑÐ¸ÑÐ¼Ð¾Ð² ÐºÐ°Ð´ÑÐ¾Ð²Ð¾Ð¹ ÑÐ¸Ð½ÑÑÐ¾Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÑÐµÑ Ð¼ÐµÑÐ¾Ð´Ð¾Ð² Ð²ÑÑÐ¸ÑÐ»ÐµÐ½Ð¸Ñ ÐºÐ¾ÑÑÐµÐ»ÑÑÐ¸Ð¸ ÑÐ¸Ð³Ð½Ð°Ð»Ð°. ÐÐ»Ñ ÐºÐ°Ð¶Ð´Ð¾Ð³Ð¾ Ð¼ÐµÑÐ¾Ð´Ð° ÑÐ°ÑÑÑÐ¸ÑÐ°Ð½Ñ Ð²ÐµÑÐ¾ÑÑÐ½Ð¾ÑÑÐ¸ Ð»Ð¾Ð¶Ð½Ð¾Ð¹ ÑÑÐµÐ²Ð¾Ð³Ð¸ Ð¸ Ð¿ÑÐ¾Ð¿ÑÑÐºÐ° ÑÐ¸Ð³Ð½Ð°Ð»Ð° Ð¸ Ð¿Ð¾ÑÑÑÐ¾ÐµÐ½Ñ Ð·Ð°Ð²Ð¸ÑÐ¸Ð¼Ð¾ÑÑÐ¸ Ð¼Ð¾Ð´ÑÐ»Ñ ÐºÐ¾ÑÑÑÐ¸ÑÐ¸ÐµÐ½ÑÐ° ÐºÐ¾ÑÑÐµÐ»ÑÑÐ¸Ð¸ Ð¾Ñ Ð¾ÑÐ½Ð¾ÑÐµÐ½Ð¸Ñ ÑÐ¸Ð³Ð½Ð°Ð»-ÑÑÐ¼ Ð¿ÑÐ¸ ÑÐ°Ð·Ð»Ð¸ÑÐ½ÑÑ ÑÐ°ÑÑÐ¾ÑÐ½ÑÑ Ð¸ Ð²ÑÐµÐ¼ÐµÐ½Ð½ÑÑ Ð¾ÑÑÑÑÐ¾Ð¹ÐºÐ°Ñ. ÐÐ° Ð¾ÑÐ½Ð¾Ð²Ðµ ÑÑÐ¾Ð³Ð¾ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° Ð±ÑÐ» Ð²ÑÐ±ÑÐ°Ð½ Ð»ÑÑÑÐ¸Ð¹ Ð¸Ð· ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÐµÐ¼ÑÑ Ð¼ÐµÑÐ¾Ð´Ð¾Ð². Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð¾ Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ð¸Ðµ Ð¿Ð¾ Ð°Ð¿Ð¿Ð°ÑÐ°ÑÐ½Ð¾Ð¹ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð²ÑÐ±ÑÐ°Ð½Ð½Ð¾Ð³Ð¾ Ð°Ð»Ð³Ð¾ÑÐ¸ÑÐ¼Ð° Ð² ÐÐÐÐ¡, ÐºÐ¾ÑÐ¾ÑÐ¾Ðµ ÑÑÐµÐ±ÑÐµÑ Ð¼ÐµÐ½ÑÑÐµÐ³Ð¾ ÐºÐ¾Ð»Ð¸ÑÐµÑÑÐ²Ð° ÑÐµÑÑÑÑÐ¾Ð². ÐÐ»Ñ Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð°Ð»Ð³Ð¾ÑÐ¸ÑÐ¼Ð° ÑÐ°ÑÑÑÐ¸ÑÐ°Ð½Ñ Ð²ÐµÑÐ¾ÑÑÐ½Ð¾ÑÑÐ¸ Ð»Ð¾Ð¶Ð½Ð¾Ð¹ ÑÑÐµÐ²Ð¾Ð³Ð¸ Ð¸ Ð¿ÑÐ¾Ð¿ÑÑÐºÐ° ÑÐ¸Ð³Ð½Ð°Ð»Ð°, Ð° ÑÐ°ÐºÐ¶Ðµ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½ Ð¿Ð¾ÑÐ¾Ð³ Ð¿ÑÐ¸Ð½ÑÑÐ¸Ñ ÑÐµÑÐµÐ½Ð¸Ñ. ÐÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð»Ð¸ÑÑ Ð¾ÑÐºÑÑÑÑÐµ Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½ÑÐµ ÑÐµÑÑÑÑÑ Ð¸ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ñ Ð¿Ð¾Ð¸ÑÐºÐ° Ð¸ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¸. ÐÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¾ (Ð¿ÑÐ¾ÑÐµÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¾) Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð½Ð¾Ðµ Ð¾Ð±ÐµÑÐ¿ÐµÑÐµÐ½Ð¸Ðµ Matlab.
description: The purpose of the work is to analyze algorithms for receiving signals from satellite communication systems, for subsequent implementation in FPGAs. As a result of the work, algorithms for coarse frequency, time, frame, precise frequency, pheasant synchronization were described. For frame synchronization algorithms, an analysis of three methods for calculating signal correlation has been carried out. For each method, the probabilities of a false alarm and a missed signal are calculated and the dependences of the correlation coefficient modulus on the signal-to-noise ratio for various frequency and time adjustments are constructed. Based on this analysis, the best of the considered methods was selected. An improvement of the chosen method is proposed, which requires fewer resources when implemented in FPGAs. For the proposed algorithm, the probabilities of a false alarm and a missed signal are calculated, and the decision threshold is determined. Open educational resources and information search and analysis programs were used. Matlab software has been applied (tested).