• 6 subcarrier spacing
Cell-specific DL Reference Signal (Common Pilots, FS1 and FS2)
Time and Frequency resource allocations:
– Allocated on a per Antenna port basis: {0, 1, 2, 3, 4} physical antenna ports
– Antenna 0 and 1 transmitted on 2 OFDM symbols every slot
6 subcarrier spacing and 2x staggering (45 kHz freq sampling)
– Antenna 2 and 3 transmitted on 1 OFDM symbol in every slot
6 subcarrier spacing with 2x staggering across slots
– Same frequency spacing for normal and extended CP numerologies
DL Reference Signals: 2 TX Antenna
DL Reference Signals: 4 TX Antenna
Downlink Transmission – An Example
Example of Frame Structure Type 1 (extended CP) transmission
Downlink Transmission – An Example
The slide shows how a subframe FS1 (extended CP) ends up being transmitted. Observe the first
OFDM symbol cell-specific reference signal, PCFICH, informing the assigned UEs of the
corresponding PDCCH format. Also PDCCH is transmitted in the first 1-3 OFDM symbols
carrying resource allocation and MCS to the corresponding allocated UEs.