adaptive coding for wireless data networks - electrical
TRANSCRIPT
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
!1
0
1
2
3
4
5
code rate R
Requ
ired
E b/N0 d
B
K = 10K = 100K = 1000K = 5000
Deinter-
Redundancy Control
Inter-leaver
leaver
Channel
CRCEncoder
CRCCheck
ACK
/ NA
K
Rate
EncoderCompatible
DecoderCompatible
Rate
MOD
DEMOD
!10 !5 0 5 10 15 20 25 30 35 4015
20
25
30
35
40
45
50
55
60
65
SNR (dB)
N*, O
ptim
al C
ode
Leng
th
!10 !5 0 5 10 15 20 25 30 35 400
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
SNR (dB)
Thro
ughp
ut
0 5 10 15 20 25 300
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
SNR (dB)
Norm
alize
d Th
roug
hput
type!I 1/4type!I 1/2type!I 4/5type!I Rate adaptive
0 5 10 15 20 25 300
5
10
15
20
25
30
SNR (dB)
Aver
age
Num
ber o
f Ret
rans
miss
ions
type!I 1/4type!I 1/2type!I 4/5type!I Rate adaptive
0 5 10 15 20 25 300
0.001
0.002
0.003
0.004
0.005
0.006
0.007
0.008
0.009
0.01
SNR (dB)
Norm
alize
d En
ergy
Effi
cienc
y
type!I 1/4type!I 1/2type!I 4/5type!I Rate adaptive
0 5 10 15 20 25 300
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
SNR (dB)
Norm
alize
d Th
roug
hput
type!II 2 Symbolstype!II 4 Symbolstype!II 8 Symbolstype!I Rate!Adaptive
0 5 10 15 20 25 300
5
10
15
20
25
30
SNR (dB)
Aver
age
Num
ber o
f Ret
rans
miss
ions
type!II 2 Symbolstype!II 4 Symbolstype!II 8 Symbolstype!I Rate!Adaptive
0 5 10 15 20 25 300
0.002
0.004
0.006
0.008
0.01
0.012
0.014
0.016
0.018
0.02
SNR (dB)
Norm
alize
d En
ergy
Effi
cienc
y
type!II 2 Symbolstype!II 4 Symbolstype!II 8 Symbolstype!I Rate!Adaptive
0 5 10 15 20 25 300
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
SNR (dB)
Thro
ughp
ut
type!I RA, 0.99type!I RA, 0.50type!I RA, 0.01
0 5 10 15 20 25 300
5
10
15
20
25
30
SNR (dB)
Aver
age
Num
ber o
f Ret
rans
miss
ions
type!I RA, 0.99type!I RA, 0.50type!I RA, 0.01
0 5 10 15 20 25 300
0.005
0.01
0.015
0.02
0.025
SNR (dB)
Norm
alize
d En
ergy
Effi
cienc
y
type!I RA, 0.99type!I RA, 0.50type!I RA, 0.01
0 5 10 15 20 25 300
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
SNR (dB)
Norm
alize
d Th
roug
hput
type!II, 0.99type!II, 0.50type!II, 0.01
0 5 10 15 20 25 300
5
10
15
20
25
30
SNR (dB)
Aver
age
Num
ber o
f Ret
rans
miss
ions
type!II, 0.99type!II, 0.50type!II, 0.01
0 5 10 15 20 25 300
0.005
0.01
0.015
0.02
0.025
0.03
SNR (dB)
Norm
alize
d En
ergy
Effi
cienc
y
type!II, 0.99type!II, 0.50type!II, 0.01
0 5 10 15 20 25 300
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
SNR (dB)
Thro
ughp
ut
type!I RA, No Erasuretype!I RA, Erasure
0 5 10 15 20 25 300
5
10
15
20
25
30
SNR (dB)
Aver
age
Num
ber o
f Rra
nsm
issio
ns
type!I RA, No Erasuretype!I RA, Erasure
0 5 10 15 20 25 300
0.002
0.004
0.006
0.008
0.01
0.012
SNR (dB)
Norm
alize
d En
ergy
Effi
cienc
y
type!I RA, No Erasuretype!I RA, Erasure
0 5 10 15 20 25 300
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
SNR (dB)
Norm
alize
d Th
roug
hput
type!II 16!Symbols, No Erasuretype!II 16!Symbols, Erasure
0 5 10 15 20 25 300
5
10
15
20
25
30
SNR (dB)
Aver
age
Num
ber o
f Ret
rans
miss
ions
type!II 16!Symbols, No Erasuretype!II 16!Symbols, Erasure
0 5 10 15 20 25 300
0.002
0.004
0.006
0.008
0.01
0.012
0.014
0.016
0.018
SNR (dB)
Norm
alize
d En
ergy
Effi
cienc
y
type!II 16!Symbols, No Erasuretype!II 16!Symbols, Erasure
H
V
I
Vertical SISOOutput
Horizontal SISO
......
Interleave
Interleave
1
2
K
...
...1 2 K
...
...K
2
12
K...
...K
12
K
2
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
10!4
10!3
10!2
10!1
Eb/N0 (dB)
BER
(31,26)2, SI(31,26)2, BI(15,11)2, SI(15,11)2, BI
0 200 400 600 800 1000100
1050
10100
10150
10200
10250
Codeword Weight Z
Wei
ght E
num
erat
or A
(z)
(31,26)2, r=0.72(31,26)3, r=0.63(31,26)4, r=0.57
0 2 4 6 8 10 12 14 16 18 2010!10
10!8
10!6
10!4
10!2
100
102
104
106
108
1010
Codeword Weight Z
Wei
ght E
num
erat
or A
(z)
(31,26)2, r=0.72(31,26)3, r=0.63(31,26)4, r=0.57
0.5 1 1.5 2 2.5 3 3.5 4
10!4
10!3
10!2
10!1
Eb/N0 (dB)
BER
Constraint Length 4Constraint Length 5
1 2 3 4 5 6 710!10
10!9
10!8
10!7
10!6
10!5
10!4
10!3
10!2
10!1
Eb/N0 (dB)
BER
2D prdt, r=0.723D prdt, r=0.634D prdt, r=0.57
1 2 3 4 5 6 710!9
10!8
10!7
10!6
10!5
10!4
10!3
10!2
10!1
100
Eb/N0 (dB)
PER
2D prdt, r=0.723D prdt, r=0.634D prdt, r=0.57
2 4 6 8 10 12 1410!8
10!7
10!6
10!5
10!4
10!3
10!2
10!1
Eb/N0 (dB)
BER
2D prdt, r=0.723D prdt, r=0.634D prdt, r=0.57
2 4 6 8 10 12 1410!6
10!5
10!4
10!3
10!2
10!1
100
Eb/N0 (dB)
PER
2D prdt, r=0.723D prdt, r=0.634D prdt, r=0.57
0.5 1 1.5 2 2.5 3 3.5 410!5
10!4
10!3
10!2
10!1
Eb/N0 (dB)
BER
r=0.72, productr=0.72, turbo r=0.63, productr=0.63, turbo
0.5 1 1.5 2 2.5 3 3.5 410!3
10!2
10!1
100
Eb/N0 (dB)
PER
r=0.72, productr=0.72, turbo r=0.63, productr=0.63, turbo
1 2 3 4 5 6 710!5
10!4
10!3
10!2
10!1
Eb/N0 (dB)
BER
r=0.72, productr=0.63, productr=0.72, turbor=0.63, turbo
1 2 3 4 5 6 710!3
10!2
10!1
100
Eb/N0 (dB)
PER
r=0.72, productr=0.63, productr=0.72, turbor=0.63, turbo
!2 0 2 4 6 80.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Es/N0 (dB)
Thro
ughp
ut
RCP Capacity Cutoff rateRCPT
RSC
RSC
INT 1
INT n-1
RSC
Puncturing
Input
Output
Packet
Packet
!
"
#
$
!
"
#
0 1 2 3 4 5 60
0.2
0.4
0.6
0.8
1
1.2
1.4
Offered Load
Norm
alize
d Ne
twor
k Th
roug
hput
ARQMetric CombiningRCPT!P2RCPT!P8
0 1 2 3 4 5 60
0.05
0.1
0.15
0.2
0.25
0.3
Offered Load
Norm
alize
d En
ergy
Effi
cienc
y
ARQMetric CombiningRCPT!P2RCPT!P8
0 1 2 3 4 5 60
50
100
150
200
250
300
350
400
Offered Load
Aver
age
Dela
y (m
s)
ARQMetric CombiningRCPT!P2RCPT!P8
0 1 2 3 4 5 60
0.2
0.4
0.6
0.8
1
1.2
1.4
Offered Load
Norm
alize
d Ne
twor
k Th
roug
hput
ARQMetric CombiningRCPT!P2RCPT!P8
0 1 2 3 4 5 60
0.05
0.1
0.15
0.2
0.25
0.3
Offered Load
Norm
alize
d En
ergy
Effi
cienc
y
ARQMetric CombiningRCPT!P2RCPT!P8
0 1 2 3 4 5 60
50
100
150
200
250
300
350
400
Offered Load
Aver
age
Dela
y (m
s)
ARQMetric CombiningRCPT!P2RCPT!P8
0 0.1 0.2 0.3 0.4 0.5 0.6 0.70
0.2
0.4
0.6
0.8
1
1.2
1.4
Normalized Energy Efficiency
Norm
alize
d Ne
twor
k Th
roug
hput
ARQMetric CombiningRCPT!P2RCPT!P8
0 0.1 0.2 0.3 0.4 0.5 0.6 0.70
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
Normalized Energy Efficiency
Norm
alize
d Ne
twor
k Th
roug
hput
ARQMetric CombiningRCPT!P2RCPT!P8
