Digital Signal Processing Reference
In-Depth Information
Multi−User, 2 bits/sec/Hz
10
−2
4 transmit antennas
6 transmit antennas
8 transmit antennas
10
−3
10
−4
10
−5
10
−6
10
15
20
25
Signal to Noise Ratio (dB)
Fig. 3.5
Simulation results for 4 users each with different number of transmit antennas and one
receiver with 4 receive antennas
Using the techniques in Sect.
3.3
,weshow
ρζ
24
−
24
P
(
d
→
d
)
≤
(3.65)
where
2
ζ
=
|
γ
1
+
k
1
γ
2
+
k
2
γ
3
+
k
3
γ
4
+
k
4
γ
5
+
k
5
γ
6
|
(3.66)
+
j
=
1
k
j
1
It is easy to see that full diversity for User 1 is achieved. Similarly, we can prove that
we can achieve full diversity for other users.
3.5 Simulation Results
In this section, we provide simulation results that confirm our analysis in the previous
sections. The performance of our proposed scheme is shown in Figs.
3.3
,
3.4
,
3.5
,
3.6
and
3.7
.InFig.
3.3
, we consider 4 users each equipped with 4 transmit antennas
and a receiver with 4 receive antennas. We compare our scheme using QPSK and
Equations (
3.28
), (
3.29
) with the scheme proposed in [
4
] for the same configuration
Search WWH ::
Custom Search