DOI QR코드

DOI QR Code

An Improved Joint Detection of Frame, Integer Frequency Offset, and Spectral Inversion for Digital Radio Mondiale Plus

  • Kim, Seong-Jun (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Park, Kyung-Won (Korea Electronics Technology Institute) ;
  • Lee, Kyung-Taek (Korea Electronics Technology Institute) ;
  • Choi, Hyung-Jin (School of Information and Communication Engineering, Sungkyunkwan University)
  • Received : 2013.12.09
  • Accepted : 2014.01.21
  • Published : 2014.02.27

Abstract

In digital radio broadcasting systems, long delays are incurred in service start time when tuning to a particular frequency because several synchronization steps, such as symbol timing synchronization, frame synchronization, and carrier frequency offset and sampling frequency offset compensation are necessary. Therefore, the operation of the synchronization blocks causes delays ranging from several hundred milliseconds to a few seconds until the start of the radio service after frequency tuning. Furthermore, if spectrum inversed signals are transmitted in digital radio broadcasting systems, the receivers are unable to decode them, even though most receivers can demodulate the spectral inversed signals in analog radio broadcasting systems. Accordingly, fast synchronization techniques and a method for spectral inversion detection are required in digital radio broadcasting systems that are to replace the analog radio systems. This paper presents a joint detection method of frame, integer carrier frequency offset, and spectrum inversion for DRM Plus digital broadcasting systems. The proposed scheme can detect the frame and determine whether the signal is normal or spectral inversed without any carrier frequency offset and sampling frequency offset compensation, enabling fast frame synchronization. The proposed method shows outstanding performance in environments where symbol timing offsets and sampling frequency offsets exist.

Keywords

References

  1. F. Horfman, C. Hansen, and W. Schafer, "Digital Radio Mondiale (DRM) digital sound broadcasting in AM bands," IEEE Trans. Broadcast., vol. 49, no.3, pp. 319-328, 2003. https://doi.org/10.1109/TBC.2003.818718
  2. ETSI Standard. Digital Radio Mondiale (DRM); System Specification. ETSI ES 201 980, V3.2.1, 2012-06.
  3. A. Steil, F. Schad, M. Feilen, M. Kohler, J. Lehnert, E. Hedrich, and G. Kilian, "Digitising VHF FM sound broadcasting with DRM+ (DRM mode E)," in Proc. Of IEEE Symposium on Broadband Multimedia Systems and Broadcasting, 2009.
  4. D. Bodson, "Digital audio around the world," IEEE Vehicular Technology Magazine, vol. 5, pp. 24-30, 2010.
  5. International Telecommunications Union-Radiocommunication Study Groups, "Digital Radio Mondiale results of the DRM field trial in Sri Lanka," ITU-R Document 6A/503E, Apr. 2011.
  6. International Telecommunications Union-Radiocommunication Study Groups, "Digital Radio Mondiale results of the DRM field trial in band I in Turin, Italy," ITU-R Document 6A/512E, May 2011.
  7. International Telecommunications Union-Radiocommunication Study Groups, "Digital Radio Mondiale and British Broadcasting Corporation (BBC) results of the DRM high power field trial in the United Kingdom," ITU-R Document 6A/532E, May 2011.
  8. V. Fischer and A. Kurpiers, "Frequency synchronization strategy for a PC-based DRM receiver," in Proc. Of International OFDM Workshop (7th InOWo'02), 2002.
  9. M. Speth, S. A. Fechtel, G. Fock, and H. Meyr, "Optimum receiver design for wireless broad-band systems using OFDM- Part I," IEEE Trans. Commun., vol. 47, pp. 1668-1677, 1999. https://doi.org/10.1109/26.803501
  10. M. Speth, S. Fechtel, G. Fock, and H. Meyr, "Optimum receiver design for OFDM-based broadband transmission- Part II: a case study," IEEE Trans. Commun., vol. 49, no. 4, pp. 571-578, 2001. https://doi.org/10.1109/26.917759
  11. M. Zhao, A. Huang, Z. Zhang, and P. Qiu, "All digital tracking loop for OFDM symbol timing," in Proc. Of Vehicular Technology Conference - Fall, pp. 2435-2439, 2003.
  12. S. J. Kim, K. W. Park, Y. S. Park, K. W. Kwon, and H. J. Choi, "Fast frame detection method for Digital Radio Mondiale Plus in spectra reversion status," International Journal of Smart Home, vol. 6, pp. 177-186, 2012.
  13. D. Kolba and T. Parks, "A prime factor FFT algorithm using high-speed convolution," IEEE Trans. Acoust., Speech, Signal Processing, vol. ASSP-25, pp. 281-294, 1977.
  14. D. S. Kim, S. S. Lee, J. Y. Song, K. Y. Wang, and D. J. Chung, "Design of a mixed prime factor FFT for portable digital radio mondiale receiver," IEEE Trans. Consumer Electron., vol. 54, no. 4, pp. 1590-1594, 2008. https://doi.org/10.1109/TCE.2008.4711206
  15. H. Nogami and T. Nagashima, "A frequency and timing period acquisition technique for OFDM systems," in Proc. Of IEEE Symposium on Personal, Indoor and Mobile Radio Communications, pp. 1010-1015, 1995.
  16. J. Smith and P. Grosset, "A flexible sampling-rate conversion method," in Proc. Of IEEE International Conference Acoustics Speech and Signal Processing, vol. II, pp. 19.4.1-19.4.2, 1984.
  17. S. J. Kim, K. W. Park, K. T. Lee, and H. J. Choi, "Digital tuner implementation using FM tuner for DRM Plus receivers," IEEE Trans. Consumer Electron., vol. 58, no. 2, pp. 311-317, May 2012. https://doi.org/10.1109/TCE.2012.6227428