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BICM-ID based Cooperative Network
Shujaat Ali Khan Tanoli
Advisor
Dr. Nandana Rajatheva
TelecommunicationsAsian Institute of Technology
Outline
Overview
Cooperative Network
Simulation Model
Theoretical Bounds
Results and discusion
Conclusion
Future Recommendations
List of Submissions
ReferencesAIT Masters Thesis Competition May 2009
3
Wireless Technology
We aiming toward the actualization of the fourth generation portable telephone, to achieve the rate of “giga b/s”.
1G
LTE
2G~64kbps
3G~2Mbps
4G~1Gbps
1980 1990 2000 2006~2010 2015
A s
ervi
ce s
yste
m
Year
3.9G~100Mbs
3.5G~14Mbps
High speed
Past Future
AIT Masters Thesis Competition May 2009
4
4th Generation
4G will appear as ultra high speed wireless network
Main Challenges
Power on terminals
Complexity
Spectral Efficiency
Example: DVD1 (approximately 4.5GB) download time
FDMA FDMA Above 27 hourAbove 27 hour (384kbps)(384kbps)
3.9G Mobile telephone 3.9G Mobile telephone 6 6 minutes!!!minutes!!! (100Mbps)(100Mbps)
4G mobile telephone 4G mobile telephone 36 seconds!!!36 seconds!!!
(1Gbps) (1Gbps)
AIT Masters Thesis Competition May 2009
Reflection, Diffraction, and Scattering create several versions of the signal at the receiver.
These multipath cause a multipath fading.
5
Radio Wave Transmission
Huge reflector
Base Station
Scatterer
(cm)
(cm)
Carrier frequency 2GHz
Arrival wave number 16
Rec
eive
d po
wer
(dB
)
0 5 10 15 20 25 30 35 40 45 50 0 5
10 15
20 25
30 35
40 45
50
-30
-25
-20
-15
-10
-5
0
5
10
AIT Masters Thesis Competition May 2009
6
Multipath Fading
0 5 10 15 20 25 30 35 40 45 50 0 5
10 15
20 25
30 35
40 45
50
-30
-25
-20
-15
-10
-5
0
5
10
Received power
Low High
Received power fluctuates extremely by the fact that it moves through the multipath fading channel.
[cm][cm
]AIT Masters Thesis Competition May 2009
Multipath Fading
7
0 5 10 15 20 25 30 35 40 45 50 0 5
10 15
20 25
30 35
40 45
50
-30
-25
-20
-15
-10
-5
0
5
10
Low High
0 5 10 15 20 25 30 35 40 45 50 0 5
10 15
20 25
30 35
40 45
50
-30
-25
-20
-15
-10
-5
0
5
10
0 5 10 15 20 25 30 35 40 45 50 0 5
10 15
20 25
30 35
40 45
50
-30
-25
-20
-15
-10
-5
0
5
10
0 5 10 15 20 25 30 35 40 45 50 0 5 10 15 20 25 30 35 40 45 50
-30
-25
-20
-15
-10
-5
0
5
10
0 5 10 15 20 25 30 35 40 45 50 0 5 10 15 20 25 30 35 40 45 50
-30
-25
-20
-15
-10
-5
0
5
10
0 5 10 15 20 25 30 35 40 45 50 0 5 10 15 20 25 30 35 40 45 50
-30
-25
-20
-15
-10
-5
0
5
10
0 5 10 15 20 25 30 35 40 45 50 0 5 10 15 20 25 30 35 40 45 50-30
-25
-20
-15
-10
-5
0
5
10
Received power fluctuates extremely by the fact that it moves through the multipath fading channel.
Received power
[cm]
[cm]
AIT Masters Thesis Competition May 2009
8
Multipath Fading
Error
Error
Error
Received power
Low High
0 10 20 30 40 50
Rec
eive
d po
wer
[cm]
AIT Masters Thesis Competition May 2009
9
By increasing the antennas…
AIT Masters Thesis Competition May 2009
To overcome these issues and achieving the designed goals
The diversity techniques are the milestone in the developments of wireless communication.
Spectral efficiency can be improved by using multiple antenna (MIMO) on Transmitter and receiver.
Multiple Antenna
An antenna spacing of several wavelengths is required.
At a frequency of 2 GHz, this amounts to several multiples of 15 cm.
NOT always practical for small handsets
AIT Masters Thesis Competition May 2009
13
Transmission Power
1km
1Wvoice 8kbps@2GHz
1km
To achieve high-speed data rate, very high transmission power is needed.
30m!
Data [email protected]
How Come!!!!!!!!!!Only near the BS
To send with the same 1W,…?
AIT Masters Thesis Competition May 2009
14
Co-channel Interference
Quality deterioration occurs
Frequency
f1 f2 f3
AIT Masters Thesis Competition May 2009
SOLUTION: • Cooperative Networks
•Multiple-hop Communication•Distributed Antenna Network
Developments in Cooperative Network
Further improvement of cooperative networkcoded cooperative system (Nguyen et al., 2007)
To obtain coded cooperation diversity, (Razaghi et al.,2007) proposed a new coding scheme based on LDPC for cooperative networks system.
Developments in Cooperative Network
Bit-Interleaved Coded Modulation Zehavi in 1992 introduced BICM scheme by Introducing Bit interleaving between coding an modulation.
It is proved that BICM could improved the reliability of coded modulation over fading channel in order to enhance the coding diversity (Zehavi, 1992 ).
AIT Masters Thesis Competition May 2009
Developments in Cooperative Network
Taking full advantages of Code diversity by BICM and space diversity by MIMO, (Shahid and Rajatheva, 2008) and (Zummo et al., 2008) analyze the Bit interleaved space time codes and got improved performance.
We analyze the performance of BICM-ID based cooperative networks over AWGN channel, Rayleigh and Nakagami-m fading channels to get the benefits of both code and cooperation diversity.
AIT Masters Thesis Competition May 2009
Simulation Model
AIT Masters Thesis Competition May 2009
Error RateCalculation
R1
MRC
2/3 ConvEncoder
RandInterleaver
Randde-Interleaver
Decoder
BER_data Plot
Info
RandInterleaver
S/P P/S
M
M
M
S/P P/S
M
M
M
Cooperation
Conclusion
The theoretical BER bounds of the BICM-ID based cooperative system using BPSK and 8-PSK modulations over AWGN channels Rayleigh fading channels Nakagami-m fading channels
The numerical and simulation results shows that the proposed system obtain 2-5 dB of gain over the existing systems.
AIT Masters Thesis Competition May 2009
Future Recommendations
AIT Masters Thesis Competition May 2009
Different combinations of BICM-ID with other coding schemes i.e. LDPC and Turbo coding.
The decode-and-forward (DF) mode for relaying operation instead of AF.
User cooperation instead of fixed-relays.
Multi-user scenario considering the effect of interference in OFDMA based system.
The effect of other correlated and non correlated fading channels.
List of Submissions
Conference
AIT Masters Thesis Competition May 2009
“Capacity and performance analysis of space-time block coded MIMO-OFDM systems over rician fading channel,” (MWON 2008),Bangkok.
“Asymptotic BER bounds for BICM based multiple relay cooperative network under AWGN and relay fading channels," submitted to ChinaCom2009.
List of Submissions
AIT Masters Thesis Competition May 2009
“SER analysis of hybrid FDMA-TDMA based user cooperation diversity over Nakagami fading channels,” submitted to the 12th International Symposium on Wireless Personal Multimedia Communications (WPMC09).
“Trace-based Analysis for Campus-wide Wireless LAN over Advanced Training System," submitted to ICFIN 2009, China.
List of Submissions
Journal
Book Chapter
AIT Masters Thesis Competition May 2009
“Asymptotic BER bounds for BICM-ID based single-relay cooperative network over Nakagami-m fading channels,“ submitted to IEICE Communications Letter.
“Cooperative Networks,"Advanced Technologies, IN-TECH publisher, ISBN 978-953-7619-X-X, will be published in September 2009.
References
Caire G., Taricco G. and Biglieri E. Bit Interleaved coded modulation. IEEE Transaction of Information Theory , vol. 44 NO.3, May 1998.
Gradshteyn I. S., and Ryzhik I. M., Table of Integrals, Series, and Products, pp.341 sol.3.352.4-3.353.5, 7th ed. New York: Academic Press
Li X., Chindapol A. and Ritcey J. A. Bit-Interleaved coded modulation with Iterative Decoding and 8 PSK signaling. IEEE Transaction of Communication , vol. 50 NO.8, August 2002.
Nguyen H. T., Nguyen H. H., and Le-Ngoc T. Bandwidth-efficient Bit-interleaved Coded Cooperative Communications. Wireless Personal Communications, volume 46, Number 3 / August, 2008.
AIT Masters Thesis Competition May 2009
References
Razaghi Peyman, Aleksic Marko and Yu Wei. Bit-Interleaved Coded Modulation for the Relay Channel Using Bilayer LDPC Codes. 10th Canadian Workshop on Information Theory, 2007.
Shahid I., and Rajatheva N. Asymptotic BER Bounds for Iteratively Decoded Bit Interleaved Space Time Coded Modulation under Corelated Rayleigh and Rician Fading Channels. IEEE communication letters, vol. 12, NO. 10, October 2008.
Zehavi E. 8-PSK trellis codes for a rayleigh channel. IEEE Trans.Commun., vol. 40, pp. 873884,May 1992.
Zummo Salam A., Yeh Ping-Cheng, and Stark Wayne E. New Union Bound on the Error Probability of Bit-Interleaved Space-Time Codes with Finite Interleaver Sizes. IET Communication, 2008.
AIT Masters Thesis Competition May 2009