Digital Signal Processing Reference
In-Depth Information
Capacity of 2×2 MIMO with single-polarized antennas
6.5
7
6
6
5.5
5
5
4
150
4.5
150
100
100
50
50
AS at the Tx
0
0
AS at the Rx
(a)
Capacity of 2×2 MIMO with dual-polarized antennas
7.1
7
7
6.9
6
6.8
6.7
5
6.6
4
6.5
150
6.4
100
150
100
AS at the Rx
50
50
6.3
AS at the Tx
0
0
(b)
FIgure 4.15
(2 × 2) MIMO channel capacity of isotropic antennas: (a) single-polarization con-
figuration and (b) dual-polarization configuration.
Figure 4.15 demonstrates the 2 × 2 MIMO channel capacity of isotropic antennas with
single polarization (a) and dual polarization (b). In this case, the single-polarization
configuration exploits only the azimuth isotropic antenna, and the dual polarization
configuration applies the azimuth and elevation isotropic antennas. The channel capac-
ity is examined in function of angular spread (AS) with twenty scatterers distributed
around the Tx and Rx. As mentioned in the previous section, the XPD is defined for
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