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zi@o_TrwGO;Vaa3FzaPJxfAlb(L;)POq-m%82%s+!hV!u{prTiW&UMN`k}2gn>jPkm zZ|6O-)(#6~P=(u9joGLy5LbxVHxo9R^;tEblM!=N4IVKnJxodVGZI73=G=^8>*7V}8~eegIWeQU->sY}Ik9A?p}h-Hxc=9bhol?Zfv}QV zCIg(;Bnr`iV5H-`@7c>G^nCb-BzS$Zcw(s7vfYmrWF#@`&rfmRc2&&_UM3jmN~+gL z5OOECdS%WkrTQ$oiHvyvx^|IW)fbf2UbCm@51%lsFrv3}`P^a5Msbr&``G_fQ1s=Si< zPik_Qz7RZsas5d6$j>Q4%(1Z&TJ(=IK0_Or54lvmz~ZL6dCn9?3u{ubsuZNoDjb$| z`M=|jk<9;f2iwr6cMtd{nWyl7{QnyNСomponent Сarrier | Компонентная несущая - отдельная полоса частот (канал) для приема-передачи данных. Используется в сетях LTE и 5G
Применяются в UL и DL | Ширина: 1.3, 3, 5, 10, 15 и 20 МHz | | | **CA**
Carrier Aggregation | Компонентная агрегация - одновременное использование нескольких несущих частот.
**Виды агрегации:**
![[Pasted image 20260114185637.png]]]
![[Pasted image 20260114185708.png]]
![[Pasted image 20260114185855.png]] | Обеспечивает широкую полосу канала, тем самым увеличивается обьем и скорость передаваемых данных ( до 3 Гбит/сек)

До 5 CC могут быть объединены в LTE - Advance
| https://gsm-repiteri.ru/chto-takoe-agregaciya-chastot-v-sotovoy-svyazi-4g | | **LTE**
Long-Term Evolution | | | | -| **RSSI**
Received Signal Strength Indicator | Показатель мощности принимаемого сигнала, который поступает на антенну устройства. Измеряется в дБм.
Важный параметр для определения качества и стабильности сигнала.
| Оценка дальности до BS и помехи в сети
Чем выше RSSI тем мощнее уровень сигнала и лучше качество связи.
Из-за помех RSSI - падает. | | +| **RSSI**
Received Signal Strength Indicator | Показатель мощности принимаемого сигнала, который поступает на антенну устройства. Измеряется в дБм.
Важный параметр для определения качества и стабильности сигнала.
![[Pasted image 20260114210355.png]] | Оценка дальности до BS и помехи в сети
Чем выше RSSI тем мощнее уровень сигнала и лучше качество связи.
Из-за помех RSSI - падает. | | | **EVM**
Error Vector Modulation | Отклонение реального вектора сигнала от идеального.
**Основные причины:**
Нелинейность усилителя
Фазовый шум
I/Q дисбаланс
Квантование | | | | **ACPR** | | | | | **ACLR** | | | |