Coherent and Differential Space-Time Shift Keying - ECS EPrints ...

SUGIURA et al.: COHERENT AND DIFFERENTIAL SPACE-TIME SHIFT KEYING: A DISPERSION MATRIX APPROACH 3229
I E
1.0
0.8
0.6
0.4
0.2
= -2.0 dB to 3 dB
SNR
of 0.5 dB)
(step
QPSK
CSTSK(2,2,2,4),
RSC(2,1,2)
200 000 bits
Trajectory,
= -0.5 dB
SNR
0.0
0.4 0.6 0.8 1.0
0.2 0.0
Fig. 11. EXIT chart of our QPSK-modulated CSTSK(2, 2, 2, 4) system.The
outer EXIT curve of the half-rate RSC(2, 1, 2) code was also plotted.
b
o
l]
2.0 m
its
/s
y
[
b 1.5
ity
c
1.0 a
C
a
p
3.0
2.5
0.5
0.0
0 5 10 15 20
-5 -10
I A
QPSK, CCMC
CSTSK(2,2,2,4),
QPSK, DCMC
CSTSK(2,2,2,4),
QPSK, maximum achievable rate
CSTSK(2,2,2,4),
(M,)=(2,2), BPSK, DCMC
SM,
SNR [dB]
Fig. 12. Bandwidth efficiency of our CSTSK(2, 2, 2, 4) system employing
QPSK modulation, comparing the CCMC capacity, the DCMC capacity and
the maximum achievable rate. The DCMC capacity of the BPSK-modulated
SM employing (