Your browser does not support JavaScript!
http://iet.metastore.ingenta.com
1887

access icon free Spread spectrum high performance techniques for a long haul high frequency link

Skywave ionospheric communication systems offer a good choice to satellite communications when transmitting from the poles. For the last 10 years the authors have been sounding and testing modulations through a 12 700 km high frequency link from the Spanish Antarctic Station to Spain. Previous tests comparing direct sequence spread spectrum (DS-SS) and orthogonal frequency division multiplexing (OFDM) showed that spread spectrum bit rate error (BER) results outperformed OFDM at the expense of lower bit rates. In this study the authors present three spread spectrum techniques for this long haul link that increase the bit rate and the spectral efficiency of the direct sequence while keeping the good BER performance obtained. Tests have been performed with several symbol periods as well as different bandwidth for each technique, hence the authors can conclude which combination best suits this channel.

References

    1. 1)
    2. 2)
    3. 3)
      • 11. Proakis, J.: ‘Digital communications’ (McGraw Hill, 2000).
    4. 4)
      • 8. Ads, A., Bergadà, P., Vilella, C., et al: ‘A comprehensive sounding of the ionospheric HF radio link from antarctica to Spain’, Radio Sci., 2012, 48, doi: 10.1029/2012RS005074, pp. 1–12.
    5. 5)
    6. 6)
    7. 7)
      • 12. Alsina, P., Deumal, M., Bergadà, P., et al: ‘Multiresolutive acquisition technique for DS-SS long-haul HF data link’. 11th Int. Conf. on Ionospheric Radio Systems and Techniques, 2009.
    8. 8)
      • 3. Furman, W.N., Nieto, J.W.: ‘Latest on-air testing of U.S. MIL-STD-188-110C appendix D wideband HF data waveforms’. 12th IET Int. Conf. on Ionospheric Radio Systems and Techniques, 15–17 May 2012, pp. 15.
    9. 9)
    10. 10)
      • 13. Deumal, M., Vilella, C., Socoro, J., et al: ‘A DS-SS signaling based system proposal for low SNR HF digital communications’. 10th Int. Conf. on Ionospheric Radio Systems and Techniques, 2006.
    11. 11)
    12. 12)
      • 15. Davies, K.: ‘Ionospheric Radio, Peter Peregrinus Ltd. on behalf of the Institution of Engineering and Technology, 1990.
    13. 13)
      • 1. Lee, S., Park, S., Noh, G., et al: ‘Energy-efficient spectrum access for ultra low power sensor networks’. IEEE Military Communications Conf., 2012.
    14. 14)
    15. 15)
      • 19. Barker & Williamson: ‘Broadband Frequency Agile HF Folded Dipole Antenna’, https://www.bwantennas.com/instr/fdipole.pdf, accessed August 20th 2014.
    16. 16)
    17. 17)
      • 22. Simon, M.K., Omura, J.K., Scholtz, R.A., et al: ‘Spread spectrum communications handbook’ (McGraw-Hill Telecom Engineering, 2002).
    18. 18)
      • 14. Perkiomaki, J.: ‘HF Propagation Prediction and Ionospheric Communications Analysis’, 2003–2013, http://www.voacap.com.
    19. 19)
      • 2. MIL-STD-188-110B: ‘Military Standard – Interoperability and Performance Standards for Data Modems’, US DoD, 2000.
    20. 20)
    21. 21)
    22. 22)
      • 4. NATO STANAG 4415: ‘Characteristics of a robust, non-hopping, serial-tone modulator/demodulator for severely degraded HF radio links, Edition 1, 21 June 1999.
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-com.2014.0807
Loading

Related content

content/journals/10.1049/iet-com.2014.0807
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
This is a required field
Please enter a valid email address