Browse > Article
http://dx.doi.org/10.5515/KJKIEES.2018.29.3.192

Design of Improved DFT-s-SSB OFDM and Spectral Efficiency in Multiuser Environment  

An, Changyoung (Department of Electronic Engineering, Chungbuk National University)
Lee, Jungu (Department of Electronic Engineering, Chungbuk National University)
Jang, Kyeongsoo (Department of Electronic Engineering, Chungbuk National University)
Ryu, Heung-Gyoon (Department of Electronic Engineering, Chungbuk National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.29, no.3, 2018 , pp. 192-199 More about this Journal
Abstract
This paper proposes an improved discrete Fourier transform spread single sideband(DFT-s-SSB) orthogonal frequency division multiplexing(OFDM) system that solves the problems of conventional DFT-s-SSB OFDM systems. Conventional DFT-s-SSB systems use pulse amplitude modulation(PAM) for applying SSB modulation. The higher the modulation level, the worse is the BER performance. Further, transmission is possible only through the lower sideband(LSB) spectrum. When transmitting using the LSB and upper sideband(USB) spectra simultaneously, interference occurs and spectrum recovery is not performed correctly. To solve this problem, the proposed system applies the 2/3 convolution coding to improve the bit error rate(BER) performance, adjusts the DFT size, and selects the USB spectrum to utilize the remaining spectrum resources. In addition, when using this system in an environment that supports multiuser or limited bandwidth, it uses only half of the spectrum; therefore, it can utilize the remaining spectrum resources and improve the spectral efficiency.
Keywords
SSSB-OFDM; SSB; DFT-s-OFDM; DFT Spreading; OFDM;
Citations & Related Records
연도 인용수 순위
  • Reference
1 T. Hwang, C. Yang, G. Wu, S. Li, and G. Y. Li, "OFDM and its wireless applications: A survey," IEEE Transactions on Vehicular Technology, vol. 58, no. 4, pp. 1673-1694, May 2009.   DOI
2 Y. Jiang, Z. Zhou, M. Nanri, G. I. Ohta, and T. Sato, "Performance evaluation of four orthogonal single sideband elements modulation scheme in multi-carrier transmission systems," in 2011 IEEE Vehicular Technology Conference(VTC Fall), San Francisco, CA, Sep. 2011, pp. 1-6.
3 G. I. Ohta, T. Sato, "An orthogonal frequency multiplexed (OFDM) four-layer SSB-QAM modulation method," IEICE Technical Report, vol. 114, no. 490, pp. 159-164, Mar. 2015.
4 Y. Tang, W. Shieh, and B. S. Krongold, "DFT-spread OFDM for fiber nonlinearity mitigation," IEEE Photonics Technology Letters, vol. 22, no. 16, pp. 1250-1252, Aug. 2010.   DOI
5 F. Hasegawa, S. Shinjo, A. Okazaki, A. Okamura, L. Brunel, and D. Mottier, "Static sequence assisted out-of-band power suppression for DFT-s-OFDM," in 2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications(PIMRC), Hong Kong, 2015, pp. 61-66.
6 K. Abo, T. H. Vo, A. Boonkajay, and F. Adachi, "Spectrum efficient single-sideband single-carrier with frequency-domain equalization," in 2015 IEEE 81st Vehicular Technology Conference(VTC Spring), Glasgow, 2015, pp. 1-5.
7 N. Arshad, A. Basit, "Implementation and analysis of convolutional codes using MATLAB," International Journal of Multidisciplinary Sciences and Engineering, vol. 3, no. 8, pp. 9-12, 2012.
8 Y. Wu, W. Y. Zou, "Orthogonal frequency division multiplexing: A multi-carrier modulation scheme," IEEE Transactions on Consumer Electronics, vol. 41, no. 3, pp. 392-399, Aug. 1995.   DOI