title: ÐÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ðµ Ð¼ÐµÑÐ¾Ð´Ð° Ð´Ð¾Ð±Ð°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¸Ð·Ð±ÑÑÐ¾ÑÐ½ÑÑ Ð±Ð¸ÑÐ¾Ð² Ð´Ð»Ñ ÑÐ½Ð¸Ð¶ÐµÐ½Ð¸Ñ Ð¿Ð¸Ðº-ÑÐ°ÐºÑÐ¾ÑÐ° Ð¼Ð½Ð¾Ð³Ð¾ÑÐ°ÑÑÐ¾ÑÐ½ÑÑ ÑÐ¸Ð³Ð½Ð°Ð»Ð¾Ð²
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Application of the method of adding redundant bits to reduce the peak factor of multi-frequency signals
Creators: name: ÐÐ¾Ð³Ð°ÑÑÑÐµÐ²Ð°, ÐÐ°ÑÐ¸Ð½Ð°
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¸Ðº-ÑÐ°ÐºÑÐ¾ÑÐ° OFDM ÑÐ¸Ð³Ð½Ð°Ð»Ð°
Ð¼ÐµÑÐ¾Ð´ ÑÐµÐ·ÐµÑÐ²Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¿Ð¾Ð´Ð½ÐµÑÑÑÐ¸Ñ
Ð´Ð¾Ð±Ð°Ð²Ð»ÐµÐ½Ð¸Ðµ Ð¸Ð·Ð±ÑÑÐ¾ÑÐ½ÑÑ Ð±Ð¸Ñ
Matlab
LDPC ÐºÐ¾Ð´Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
peak-factor OFDM signal
subcarrier redundancy method
adding redundant bits
LDPC encoding

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¿Ð¾Ð½Ð¸Ð¶ÐµÐ½Ð¸Ñ Ð¿Ð¸Ðº-ÑÐ°ÐºÑÐ¾ÑÐ° OFDM ÑÐ¸Ð³Ð½Ð°Ð»Ð° Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ Ð¼ÐµÑÐ¾Ð´Ð° Ð´Ð¾Ð±Ð°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¸Ð·Ð±ÑÑÐ¾ÑÐ½ÑÑ Ð±Ð¸Ñ. ÐÐ°Ð½Ð½Ð¾Ðµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð±ÑÐ»Ð¾ ÑÐµÐ°Ð»Ð¸Ð·Ð¾Ð²Ð°Ð½Ð¾ Ð² ÑÑÐµÐ´Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Matlab. ÐÑÐ»Ð° ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð° Ð¼Ð¾Ð´ÐµÐ»Ñ Ð¿ÑÐ¸ÑÐ¼Ð°-Ð¿ÐµÑÐµÐ´Ð°ÑÐ¸ OFDM ÑÐ¸Ð³Ð½Ð°Ð»Ð° Ñ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸ÐµÐ¼ LDPC ÐºÐ¾Ð´Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ. ÐÑÐ»Ð¸ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ñ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¿Ð¾ Ð²Ð»Ð¸ÑÐ½Ð¸Ñ ÑÐ°Ð·Ð½Ð¾Ð³Ð¾ ÑÐ¸ÑÐ»Ð° Ð¸Ð·Ð±ÑÑÐ¾ÑÐ½ÑÑ Ð±Ð¸Ñ Ð½Ð° Ð¿Ð¸Ðº-ÑÐ°ÐºÑÐ¾Ñ ÑÐ¸Ð³Ð½Ð°Ð»Ð° OFDM Ð´Ð»Ñ ÑÐ°Ð·Ð½ÑÑ Ð¼Ð¾Ð´ÑÐ»ÑÑÐ¸Ð¹ (BPSK, QAM16, QAM64). ÐÐ°ÐºÑÐ¸Ð¼Ð°Ð»ÑÐ½Ð¾Ðµ ÑÐ¸ÑÐ»Ð¾ Ð¸Ð·Ð±ÑÑÐ¾ÑÐ½ÑÑ Ð±Ð¸Ñ Ð±ÑÐ»Ð¾ 12, ÑÐ°Ðº ÐºÐ°Ðº Ð´Ð°Ð»ÑÐ½ÐµÐ¹ÑÐµÐµ ÑÐ²ÐµÐ»Ð¸ÑÐµÐ½Ð¸Ðµ ÐºÐ¾Ð»Ð¸ÑÐµÑÑÐ²Ð° Ð¸Ð·Ð±ÑÑÐ¾ÑÐ½Ð¾Ð¹ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¸ Ð±ÑÐ»Ð¾ Ð½Ðµ ÑÐµÐ»ÐµÑÐ¾Ð¾Ð±ÑÐ°Ð·Ð½ÑÐ¼, ÑÐ°Ðº ÐºÐ°Ðº ÑÑÐ¾ Ð¿ÑÐ¸Ð²Ð¾Ð´Ð¸Ñ Ðº Ð±Ð¾Ð»ÑÑÐ¾Ð¼Ñ ÑÐ¸ÑÐ»Ñ Ð¿ÐµÑÐµÐ±Ð¾ÑÐ¾Ð² Ð²Ð°ÑÐ¸Ð°Ð½ÑÐ¾Ð² Ð·Ð½Ð°ÑÐµÐ½Ð¸Ð¹ Ð¸Ð·Ð±ÑÑÐ¾ÑÐ½ÑÑ Ð±Ð¸Ñ. Ð ÑÐ¾Ð´Ðµ Ð´Ð°Ð»ÑÐ½ÐµÐ¹ÑÐµÐ³Ð¾ ÑÐ²ÐµÐ»Ð¸ÑÐµÐ½Ð¸Ñ ÑÐ¸ÑÐ»Ð° Ð´Ð¾Ð¿Ð¾Ð»Ð½Ð¸ÑÐµÐ»ÑÐ½ÑÑ Ð±Ð¸Ñ Ð¾Ð¶Ð¸Ð´Ð°Ð»Ð¾ÑÑ ÑÐ²Ð¸Ð´ÐµÑÑ, ÑÑÐ¾ Ð´Ð¾Ð¹Ð´Ñ Ð´Ð¾ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð·Ð½Ð°ÑÐµÐ½Ð¸Ñ, Ð¿Ð¸Ðº-ÑÐ°ÐºÑÐ¾Ñ OFDM ÑÐ¸Ð³Ð½Ð°Ð»Ð° Ð±Ð¾Ð»ÑÑÐµ Ð½Ðµ Ð±ÑÐ´ÐµÑ Ð·Ð½Ð°ÑÐ¸ÑÐµÐ»ÑÐ½Ð¾ Ð¸Ð·Ð¼ÐµÐ½ÑÑÑÑÑ. Ð¢Ð°ÐºÐ¶Ðµ Ð±ÑÐ»Ð¾ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¾ ÑÑÐ°Ð²Ð½ÐµÐ½Ð¸Ñ Ð´Ð²ÑÑ Ð¼ÐµÑÐ¾Ð´Ð¾Ð² Ð¿Ð¾Ð½Ð¸Ð¶ÐµÐ½Ð¸Ñ Ð¿Ð¸Ðº-ÑÐ°ÐºÑÐ¾ÑÐ° OFDM ÑÐ¸Ð³Ð½Ð°Ð»Ð°, ÑÐ°ÐºÐ¸Ñ ÐºÐ°Ðº Ð¼ÐµÑÐ¾Ð´ ÑÐµÐ·ÐµÑÐ²Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¿Ð¾Ð´Ð½ÐµÑÑÑÐ¸Ñ Ð¸ Ð¸ÑÑÐ»ÐµÐ´ÑÐµÐ¼ÑÐ¹ Ð¼ÐµÑÐ¾Ð´. ÐÑÐ»Ð¸ Ð¿Ð¾Ð»ÑÑÐµÐ½Ñ Ð³ÑÐ°ÑÐ¸ÐºÐ¸ ÑÐ°ÑÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ Ð¿Ð¸Ðº-ÑÐ°ÐºÑÐ¾ÑÐ° Ð´Ð»Ñ Ð´Ð°Ð½Ð½ÑÑ Ð¼ÐµÑÐ¾Ð´Ð¾Ð². ÐÐ¾ Ð¿Ð¾Ð»ÑÑÐµÐ½Ð½ÑÐ¼ Ð³ÑÐ°ÑÐ¸ÐºÐ°Ð¼ Ð¼Ð¾Ð¶Ð½Ð¾ ÑÐ´ÐµÐ»Ð°ÑÑ Ð²ÑÐ²Ð¾Ð´, ÑÑÐ¾ Ð¸ÑÑÐ»ÐµÐ´ÑÐµÐ¼ÑÐ¹ Ð¼ÐµÑÐ¾Ð´ Ð¸Ð¼ÐµÐµÑ Ð±Ð¾Ð»ÑÑÐ¸Ð¹ Ð²ÑÐ¸Ð³ÑÑÑ, ÑÐµÐ¼ Ð¼ÐµÑÐ¾Ð´ ÑÐµÐ·ÐµÑÐ²Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¿Ð¾Ð´Ð½ÐµÑÑÑÐ¸Ñ Ð¿ÑÐ¸ ÑÐµÑ Ð¶Ðµ ÑÑÐ»Ð¾Ð²Ð¸ÑÑ.
description: This work is devoted to the study of lowering the peak factor OFDM signal using the method of adding excess bits. This research was implemented in the Matlab simulation environment. A model of receiving and transmitting OFDM signal using LDPC encoding was developed. Studies were conducted on the effect of different numbers of redundant bits on the peak factor of the OFDM signal for different modulations (BPSK, QAM16, QAM64). The maximum number of redundant bits was 12, since further increasing the amount of redundant information was not appropriate, since this leads to a large number of iterations of the redundant bit values. In the course of further increasing the number of additional bits, it was expected to see that after reaching a certain value, the peak factor of the OFDM signal would no longer change significantly. Two methods of lowering the peak factor OFDM signal were also compared, such as the method of reserving subcarriers and the method of adding redundant bits. Graphs of the peak factor distribution for these methods were obtained. Based on the obtained graphs, we can conclude that the method under study has a greater advantage than the method of reserving subcarriers under the same conditions.