Side konspekt 2020 / eksami kordamisküsimused
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.
* Reference Signals used to estimate carrier offset, channel estimation,
timing synchronisation etc.
* Reference signals are transmitted during the first and fifth OFDM
annaabi.ee 
