• DocumentCode
    573952
  • Title

    Research of soft decision modulations based on parallel combinatory spread spectrum system

  • Author

    Liu, Mingduo ; Li, Honglei ; Guo, Lili

  • Author_Institution
    Coll. of Inf. & Commun. Eng., Harbin Eng. Univ., Harbin, China
  • fYear
    2012
  • fDate
    27-30 May 2012
  • Firstpage
    507
  • Lastpage
    511
  • Abstract
    The modulation methods are discussed in parallel combinatory spread spectrum (PCSS) system. Several modulation methods which can be demodulated without threshold judging (that is soft decision) is mainly studied. The system model is built and simulated in this paper. According to the correlation of superposition PN sequences, a new soft decision QPSK modulation in PCSS system is proposed. This simulation results show that the reliability of proposed soft decision QPSK modulation is better than that of hard decision QPSK modulation and this method is useful in engineering application.
  • Keywords
    quadrature phase shift keying; spread spectrum communication; parallel combinatory spread spectrum system; soft decision QPSK modulation; superposition PN sequence correlation; Binary phase shift keying; Bit error rate; Correlation; Signal to noise ratio; correlation of superposition PN sequences; parallel combinatory spread spectrum system; soft decision modulation;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Millimeter Waves (GSMM), 2012 5th Global Symposium on
  • Conference_Location
    Harbin
  • Print_ISBN
    978-1-4673-1302-5
  • Type

    conf

  • DOI
    10.1109/GSMM.2012.6314390
  • Filename
    6314390