Pemodelan Non-uniform Coded-Modulation pada Kanal Akustik Bawah Air di Lingkungan Perairan Dangkal
(1) Politeknik Elektronika Negeri Surabaya
(2) Politeknik Elektronika Negeri Surabaya
(3) Politeknik Elektronika Negeri Surabaya
(4) Politeknik Negeri Bengkalis
(*) Corresponding Author
Abstract
In this paper, presented an OFDM performance evaluation with the Non-uniform Coded-Modulation in the underwater acoustic channel in shallow water. A row of binary information is encoded by BCH code (7.4) for error correction and combined with Non-uniform modulation which is the result of modification of the subcarrier arrangement of the OFDM standard IEEE 802.11a. Modeling uses 52 subcarriers consisting of 4 pilots and 48 subcarrier data which are divided into three parts, i.e.: 24 subcarrier data with 16-Quadrature Amplitude Modulation (16-QAM) modulation, 12 subcarrier data with Quadrature phase-shift keying (QPSK) modulation and 12 other data subcarriers with Binary key-shift keying (BPSK) modulation. The channel type used describes the Additive White Gaussian Noise (AWGN) condition and is the result of measurement data. The analysis is done in terms of Signal-to-Noise-Ratio (SNR) and Bit Error Rate (BER) show that the value of the error rate of 0.001, modulation of BPSK, QPSK, 16-QAM, and Non-uniform modulation required the power each 5 dB, 8.5 dB, 10.3 dB, and 7.9 dB. However, the proposed system is able to suppress the required power up to 6 dB. The proposed system also shows better performance than fixed modulation and Non-uniform Modulation, which in this case with low power to achieve the same error rate. In addition, the proposed system has a coding gain of 1.9 dB compared to a non-uniform modulation system. Real testing is also done with measurement data at Mangrove estuary, Surabaya. The results show performance similar to simulations performed on Gaussian noise channels.
Keywords
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References
M. Chitre, S. Shahabudeen and M. Stojanovic, “Underwater Acoustic Communications and Networking: Recent Advances and Future Challenges,” Marine Technology Society Journal, vol. 42, pp. 103-116, 2008.
Y. Labrador, M. Karimi, D. Pan and J. Miller, “Modulation and Error Correction in the Underwater Acoustic Communication Channel,” International Journal of Computer Science and Network Security (IJCSNS), vol. 9, no. 7, pp. 123-130, 2009.
T. H. E. A. B. B. and J. C. P. , “Communication over Doppler spread channels. Part I: Channel and receiver presentation,” in IEEE Journal of Oceanic Engineering, vol. 25, no. 1, pp. 62-71, 2000.
M. Stojanovic, “Underwater acoustic communications: Design considerations on the physical layer,” dalam Proc. IEEE/IFIP 5th Annu. Conf. Wireless On Demand Netw. Syst. Services, Garmisch-Partenkirchen, 2008.
I.-P. A. I. Kusuma, “Aplikasi Metode Passive Time Reversal Mirror Untuk Mengurangi Pengaruh Multipath Pada Komunikasi Akustik Bawah Air,” JURNAL INOVTEK POLBENG, vol. 07, no. 1, pp. 1-9, 2017.
I.-P. I. K. Kusuma and M. Margareta Z.B, “Pengaruh Gerakan Trandsducer terhadap Kualitas Sinyal Akustik Bawah Air dengan Pendekatan Simulasi,” JURNAL INOVTEK POLBENG, vol. 08, no. 2, pp. 158-167, 2018.
B. Li, J. Huang, S. Zhou, K. Ball and M. Stojanovic, “MIMO-OFDM for High-Rate Underwater Acoustic Communications,” in IEEE Journal of Oceanic Engineering, vol. 34, no. 4, pp. 634-644, 2009.
M. Stojanovic, “Low Complexity OFDM Detector for Underwater Acoustic Channels,” dalam OCEANS 2006, Boston, 2006.
L. Wan, H. Zhou, X. Xu, Y. Huang, S. Zhou and Z. Shi, “Adaptive Modulation and Coding for Underwater Acoustic OFDM,” dalam IEEE Journal of Oceanic Engineering, vol. 40, no. 2, pp. 327-336, 2015.
M. Stojanovic and J. Preisig, “Underwater acoustic communication channels: Propagation models and statistical characterization,” IEEE Commun. Mag., vol. 47, no. 1, p. 84–89, 2009.
A. Radosevic, R. Ahmed, T. M. Duman and J. G. Proakis, “Adaptive OFDM Modulation for Underwater Acoustic Communications: Design Considerations and Experimental Results,” in IEEE Journal of Oceanic Engineering, vol. 39, no. 2, pp. 357-370, 2014.
A. Radosevic, T. M. Duman, J. G. Proakis and M. Stojanovic, “Channel prediction for adaptive modulation in underwater acoustic communications,” dalam OCEANS 2011 IEEE - Spain, Santander, 2011.
T. B. Santoso, Wirawan and G. Hendrantoro, “Image transmission with OFDM technique in underwater acoustic environment,” dalam 012 7th International Conference on Telecommunication Systems, Services, and Applications (TSSA), Bali, 2012.
S. S. Sarnin, N. F. Nairn and W. N. S. W. Muhamad, “Performance evaluation of phase shift keying modulation technique using BCH code, Cyclic code and Hamming code through AWGN channel model in communication system,” dalam The 3rd International Conference on Information Sciences and Interaction Sciences, Chengdu, 2010.
K. M. S. Soyjaudah and B. Rajkumarsingh, “Adaptive coding and modulation using Reed Solomon codes for Rayleigh fading channels,” dalam EUROCON'2001. International Conference on Trends in Communications. Technical Program, Proceedings (Cat. No.01EX439), Bratislava, 2001.
S. A. Wulandari, T. B. Santoso and I.-G. P. Astawa, “Performance Evaluation of Non-uniform Modulation of OFDM Subcarrier in the Underwater Acoustic Environment,” dalam 2018 International Electronics Symposium on Engineering Technology and Applications (IES-ETA), Bali, 2018.
T. B. Santoso, E. Widjiati, Wirawan and G. Hendran, “Ambient noise measurement and characterization of underwater acoustic channel in Surabaya bay,” dalam 2015 IEEE Asia Pacific Conference on Wireless and Mobile (APWiMob), Bandung, 2015.
S. Adzhani, H. Mahmudah and T.B Santoso, “Time-Frequency Analysis of Underwater Ambient Noise of Mangrove Estuary,” dalam International Electronics Symposium (IES), Bali, 2016.
DOI: https://doi.org/10.35314/ip.v9i1.890
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