LTE Signaling
R&S
®
CMW-KM5xx/-KS5xx
31
User Manual 1173.9628.02 ─ 16
Fig. 2-9: Resource element grid (7 OFDM symbols per RB, 1 TX antenna)
The positions of resource elements carrying reference signals (pilots) are standardized
and depend on the number of transmit antennas. The preceding figure applies to sin-
gle-antenna configurations. If more than one transmit antenna is used, each antenna
uses different resource elements for reference signals. These resource elements are
reserved for one antenna and not used at all by the other antennas. The following fig-
ure shows the resource element grid for a two transmit antenna configuration, used
e.g. for MIMO 2x2.
Fig. 2-10: Resource element grids for 2 TX antennas
The smallest resource unit that can be assigned to a UE consists of two resource
blocks (180 kHz, 1 ms). The assignment of resources to a UE can vary in time and fre-
quency domain (see next figure).
General Description
深圳德标仪器
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