1. [The Progresses on the TPC simulations]
March 2007
doc.: IEEE
March 2008
[The Progresses on the TPC simulations]
IEEE P Wireless RANs Date:
Authors:
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Chang-Joo Kim, ETRI
Chang-Joo Kim, ETRI

2. March 2007
doc.: IEEE
March 2008
Abstract
This presentation is to explain the progresses on the TPC (Transmit Power Control) simulations. We have discussed the issues on the TPC simulations since the January This presentation is an interim results including as follows,
Simulation configurations
Updates of ETRI’s simulator
Comparisons of normalized C/N in AWGN channel
Future works
Chang-Joo Kim, ETRI
Chang-Joo Kim, ETRI

3. Simulation Configurations
March 2007
doc.: IEEE
March 2008
Simulation Configurations
Representative of WRAN channel: profile B
Rayleigh fading:
Constant amplitude and phase within a frame
Variable or constant amplitude, variable phase between a frame
FEC: convolutional coding
FEC block size:
Determined by concatenation rule
Burst size (n):
1800 Bytes (QPSK), 3600 Bytes (16QAM), 5400 Bytes (64QAM)
Occupy at least 6 OFDM symbols for different modulation and code rate
Reference performance: BER=10-6 (to be confirmed)
Chang-Joo Kim, ETRI
Chang-Joo Kim, ETRI

4. Updates of ETRI’s Simulator
March 2007
doc.: IEEE
March 2008
Updates of ETRI’s Simulator
Subcarrier and bit interleaver
The interleaving parameters for all block size need to be defined
Waiting for the reply from France Telecom
Concatenation rule
The block size is different depending the modulation and FEC rate
Modification of Rayleigh fading simulator
Similar to DVB-T channel environments
Data to burst mapping
Downstream data is allocated using linear-vertical scheme
Chang-Joo Kim, ETRI
Chang-Joo Kim, ETRI

5. March 2007
doc.: IEEE
March 2008
EICTA MBRAI 2.0
It is Mobile and Portable DVB-T/H Radio Access Interface Specification
There is a meaning in that the center frequency and bandwidth are identical with WRAN system
C/N performances for various channel
Gaussian channel
DVB-T Rayleigh channel (P1)
Portable indoor and outdoor channel (PI and PO)
Mobile channel (TU6)
Reference BER=2*10-4 after the Viterbi decoder
This BER corresponds to the DVB-T standard defined quasi error free (QEF)
QEF means “less than one uncorrelated error event per hour”, corresponding to BER=10-11 after the RS decoder
Chang-Joo Kim, ETRI
Chang-Joo Kim, ETRI

6. DVB-T C/N (dB) in AWGN Channel
March 2007
doc.: IEEE
March 2008
DVB-T C/N (dB) in AWGN Channel
The C/N values are calculated using the theoretical C/N figures added by an implementation margin as follows,
1.1 dB for QPSK
1.3 dB for 16QAM
1.5 dB for 64QAM
Chang-Joo Kim, ETRI
Chang-Joo Kim, ETRI

7. DVB-T C/N (dB) in Terrestrial Channel
March 2007
doc.: IEEE
March 2008
DVB-T C/N (dB) in Terrestrial Channel
DVB-T Specified Terrestrial Channel
The channel does not include any Doppler, i.e. it is a snapshot of a real time variant Rayleigh channel
Implementation Margin
1.6 dB for QPSK
1.8 dB for 16QAM
2.0 dB for 64QAM
Chang-Joo Kim, ETRI
Chang-Joo Kim, ETRI

8. Coded Bit Error Rate (BER) in AWGN (1)
March 2007
doc.: IEEE
March 2008
Coded Bit Error Rate (BER) in AWGN (1)
Reference
BER
Chang-Joo Kim, ETRI
Chang-Joo Kim, ETRI

9. Coded Bit Error Rate (BER) in AWGN (2)
March 2007
doc.: IEEE
March 2008
Coded Bit Error Rate (BER) in AWGN (2)
Reference
BER
Chang-Joo Kim, ETRI
Chang-Joo Kim, ETRI

10. Coded Bit Error Rate (BER) in WRAN-B
March 2007
doc.: IEEE
March 2008
Coded Bit Error Rate (BER) in WRAN-B
In progress
Chang-Joo Kim, ETRI
Chang-Joo Kim, ETRI

11. Comparisons of Normalized C/N
March 2007
doc.: IEEE
March 2008
Comparisons of Normalized C/N
Modulation and
FEC rate
ACK region
Fast feedback IE
CDMA code
QPSK - 1/2
QPSK - 2/3
QPSK - 3/4
QPSK - 5/6
16QAM - 1/2
16QAM - 2/3
16QAM – 3/4
16QAM – 5/6
64QAM – 1/2
64QAM - 2/3
64QAM - 3/4
64QAM – 5/6
Normalized C/N
(802.16e, Ped-B1)) -3 3 6
7.5 9 NA 12
14.5 15
17.5 18 20 21 23
Normalized C/N
(DVB-T, AWGN) NA
4.6
6.4
7.4
10.6
12.7
14.0
15.4
18.3
19.9
Normalized C/N
(ETRI, AWGN)
TBD
=4.3
=7.1
=10.2
=12.4
=13.5
=14.8
=15.6
Normalized C/N
(DVB-T, P12))
TBD
Normalized C/N
(ETRI, WRAN-B)
In progress
1) To be confirmed, 2) P1: DVB-T Rayleigh channel
Chang-Joo Kim, ETRI
Chang-Joo Kim, ETRI

12. Future Works Additional Simulations Reference BER for WRAN TPC
March 2007
doc.: IEEE
March 2008
Future Works
Additional Simulations
To find the C/N in WRAN-B channel
To compare this value with the C/N in DVB-T or e
Reference BER for WRAN TPC
Dislike the DVB-T, does not use the RS code
Then, what is the reasonable reference BER performance?
Verification of TPC operation using Normalized C/N
Chang-Joo Kim, ETRI
Chang-Joo Kim, ETRI

13. March 2007
doc.: IEEE
March 2008
References
EICTA MBARI 2.0, Mobile and portable DVB-T/H Radio Access – Part 1: Interface specification, June 2007.
ETSI EN , Digital video broadcasting (DVB); Framing structure, channel coding and modulation for digital terrestrial television, v1.5.1, June 2004.
Chang-Joo Kim, ETRI
Chang-Joo Kim, ETRI