Journal of Communications and Networks

  • 제12권6호
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  • Pages.544-557
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  • 2010
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  • 1229-2370(pISSN)
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  • 1976-5541(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지

Magnitude Modulation for VSAT's Low Back-Off Transmission

  • Gomes, Marco (Instituto de Telecomunicacoes at the Department of Electrical and Computer Engineering, University of Coimbra) ;
  • Cercas, Francisco (ISCTE-IUL and Instituto de Telecomunicacoes) ;
  • Silva, Vitor (Instituto de Telecomunicacoes at the Department of Electrical and Computer Engineering, University of Coimbra) ;
  • Tomlinson, Martin (Department of Communications and Electronic Engineering, University of Plymouth)
  • 투고 : 2010.04.30
  • 발행 : 2010.12.31
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초록

This paper addresses the problem of controlling the envelope's power peak of single carrier modulated signals, band limited by root-raised cosine (RRC) pulse shaping filters, in order to reduce power amplifier back-off for very small aperture terminals ground stations. Magnitude modulation (MM) is presented as a very efficient solution to the peak-to-average power ratio problem. This paper gives a detailed description of the MM concept and its recent evolutions. It starts by extending the look-up-table (LUT) based approach of the MM concept to M-ary constellations with M ${\leq}$ 16. The constellation and RRC symmetries are explored, allowing considerable reduction on LUT computation complexity and storage requirements. An effective multistage polyphase (MPMM) approach for the MM concept is then proposed. As opposed to traditional LUT-MM solutions, MM coefficients are computed in real-time by a low complexity multirate filter system. The back-off from high-power amplifier saturation is almost eliminated (reduction is greater than 95%) with just a 2-stage MPMM system even for very demanding roll-off cases (e.g., ${\alpha}$ = 0,1). Also, the MPMM is independent of modulation in use, allowing its easy application to constellations with M > 16.

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참고문헌

  1. S. Miller and R. O'Dea, "Radio with peak power and bandwidth efficient modulation," U.S. Patent 5 621 762, 1997.
  2. S. Miller and R. O'Dea, "Peak power and bandwidth efficient linear modulation," IEEE Trans. Commun., vol. 46, no. 12, pp. 1639-1648, Dec. 1998. https://doi.org/10.1109/26.737402
  3. A. Tomlinson, A. Ambroze, and G. Wade, "Power and bandwidth efficient modulation and coding for small satellite communication terminals," in Proc. IEEE ICC, vol. 5, New York, Apr. 2002, pp. 2943-2946.
  4. A. Ambroze, M. Tomlinson, and G. Wade, "Magnitude modulation for small satellite earth terminals using QPSK and OQPSK," in Proc. IEEE ICC, vol. 3, Anchorage, Alaska, 2003, pp. 2099-2103.
  5. M. Gomes, F. Cercas, V. Silva, and M. Tomlinson, "Efficient M-QAM transmission using compacted magnitude modulation tables," in Proc. IEEE GLOBECOM, New Orleans, LA, Nov. 2008.
  6. M. Gomes, V. Silva, F. Cercas, and M. Tomlinson, "Low bback-off 16- APSK transmission using magnitude modulation and symbol quantization," in Proc. IEEE IWSSC, Toulouse, France, Oct. 2008, pp. 229-233.
  7. M. Gomes, V. Silva, F. Cercas, and M. Tomlinson, "Power efficient back-off reduction through polyphase filtering magnitude modulation," IEEE Commun. Lett., vol. 13, no. 8, pp. 606-608, Aug. 2009. https://doi.org/10.1109/LCOMM.2009.082112
  8. M. Gomes, V. Silva, F. Cercas, and M. Tomlinson, "Real-time lut-less magnitude modulation for peak power control of single carrier RRC filtered signals," in Proc. IEEE SPAWC, Perugia, Italy, June 2009, pp. 424-428.
  9. S. K. Mitra, Digital Signal Processing: A Computer Based Approach. 3th ed., McGraw-Hill, 2006.
  10. "Digital video broadcasting (DVB); second generation framing structure, channel coding and modulation systems for broadcasting, interactive services, news gathering and other broadband satellite applications," ETSI Std. EN 302 307 V1.1.1, Mar. 2005.
  11. P. Rha and S. Hsu, "Peak-to-average ratio (PAR) reduction by pulse shaping using a new family of generalized raised cosine filters," in Proc. IEEE VTC, vol. 1, Oct. 2003, pp. 706-710.
  12. B. Chatelain and F. Gagnon, "Peak-to-average power ratio and intersymbol interference reduction by Nyquist pulse optimization," in Proc. IEEE VTC, vol. 2, Sept. 2004, pp. 954-958.
  13. M. Chen and O. Collins, "Trellis pruning for peak-to-average power ratio reduction," in Proc. IEEE ISIT, Sept. 2005, pp. 1261-1265.
  14. M. Tanahashi and H. Ochiai, "Near constant envelope trellis shaping for PSK signaling," IEEE Trans. Commun., vol. 57, no. 2, pp. 450-458, Feb. 2009. https://doi.org/10.1109/TCOMM.2009.02.060673
  15. M. Gomes, F. Cercas, V. Silva, and M. Tomlinson, "Polyphase magnitude modulation for peak power control," in Proc. EUSIPCO, Glasgow, Scotland, Aug. 2009.
  16. U. Mengali and A. N. D'Andrea, Synchronization Techniques for Digital Receivers. Plenum Press, 1997.
  17. H. Meyr, M. Moeneclaey, and S. Fechtel, Digital Communication Receivers: Synchronization, Channel Estimation, and Signal Processing. John Wiley & Sons, Inc., 1998.
  18. R. De Gaudenzi, A. Guillen, and A. Martinez, "Performance analysis of turbo-coded apsk modulations over nonlinear satellite channels," IEEE Trans. Wireless Commun., vol. 5, no. 9, pp. 2396-2407, Sept. 2006. https://doi.org/10.1109/TWC.2006.1687763
  19. J. G. Proakis, Digital Communications. 4th ed., McGraw-Hill, 2000.
  20. R. G. Gallager, "Low-density parity-check codes," IRE Trans. Inform. Theory, vol. IT-8, pp. 21-28, Jan. 1962.
  21. "Part 16: Air interface for fixed and mobile broadband wireless access systems-amendment for physical and medium access control layers for combined fixed and mobile operation in licensed nands," IEEE Std. 802.16e, 2005.
  22. J. Chen and M. Fossorier, "Near optimum universal belief propagation based decoding of low-density parity check codes," IEEE Trans. Commun., vol. 50, no. 3, pp. 406-414, Mar. 2002. https://doi.org/10.1109/26.990903
  23. E. Sharon, S. Litsyn, and J. Goldberger, "An efficient message-passing schedule for ldpc decoding," in Proc. IEEE Convention Electr. Electron. Engineers, Sept. 2004, pp. 223-226.
  24. F. Harris, Multirate Signal Processing for Communication Systems. Prentice Hall PTR, 2004.
  25. M. Gomes, V. Silva, F. Cercas, and M. Tomlinson, "Analytical analysis of polyphase magnitude modulation method's performance," in Proc. IEEE ICC, Cape Town, South Africa, May 2010.