R&S CMW-KM5 Series, Руководство пользователя

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LTE Signaling
R&S
®
CMW-KM5xx/-KS5xx
38 User Manual 1173.9628.02 ─ 16
Fig. 2-16: "Radio channel" in a test setup, MIMO 2x2
For fading scenarios, the coefficients are determined dynamically. For scenarios with-
out fading, you can configure static channel coefficients, see
"Static Channel Model"
on page 168.
A MIMO 4x2 configuration uses four TX and two RX antennas. So the setup is as fol-
lows:
Fig. 2-17: "Radio channel" in a test setup, MIMO 4x2
For MIMO 4x2 with external RF fading, use the scenario "1 Cell - 4 RF Out". This sce-
nario provides the four antenna signals at four different RF connectors.
2.2.11.2 Beamforming Matrix
For transmission schemes with beamforming, the beamforming matrix defines the
mapping of the antenna ports to the RF output ports.
For cell-specific signals, there is no beamforming (antenna port 0 and 1). The beam-
forming matrix is only relevant for antenna ports with UE-specific signals (antenna port
5, 7 and 8).
The size of the matrix depends on the number of antenna ports and the number of RF
output ports. These parameters are configured indirectly, via the scenario, the trans-
mission mode and - for mode 8 - via the number of layers. The matrix size is listed in
table 2-2 .
General Description
深圳德标仪器
135-1095-0799