"referentssignaalidest" - 1 õppematerjal

Side konspekt 2020 / eksami kordamisküsimused

(LTE also has CQI for its own purpose). In LTE, there are 15 different CQI values randing from 1 to 15 and mapping between CQI and modulcation scheme, transport block size is defined as follows (36.213) If you are an engineer in Network (eNodeB) programming, you need to know the number of resource blocks and MCS for each CQI value to properly allocate the resources for each of UEs. 19. Selgita millest koosneb 4G LTE ressursi maatriks (Resource Grid) Koosneb referentssignaalidest ja ressursielementidest. 1 PRB (physical resource block) – RB = 12 subcarrieri ja 1ms subframe (jaotub 2-ks 0.5ms ajaslotiks) 1 maatriksi rida = 15kHz (sageduskanal). 1PRB = 12 rida -> PRB: 15kHz * 12 = 180kHz 20. Referentssignaalide otstarve ja vajalikkus LTE mobiilsides There are two types of uplink reference signals, the Demodulation Reference Signal (DMRS) and the Sounding Reference Signal (SRS). Reference signals are used for channel estimation or equalization.