Interlacing Dual-Sideband Enhanced Alternative BOC (IDEAl-BOC) Modulation and Its Application for GNSS

  • Tao Yan
  • Jiaolong WeiEmail author
  • Zuping Tang
  • Bo Qu
  • Zhihui Zhou
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 304)


Alternative binary offset carrier (AltBOC) modulated signal can combine two QPSK signals located at two close frequency bands into a constant envelope signal. It can achieve better code tracking accuracy and anti-multipath performance, thus Galileo E5 signal uses AltBOC (15, 10) modulation. However, the four signal components of AltBOC modulation have to be allocated the same power. To solve this problem, we propose a constant envelope dual-sideband enhanced alternative BOC (DEAl-BOC) modulation technique. In the case of not increasing signal generation complexity, DEAl-BOC technique can adjust the power ratio of four signal component according to different requirements, and only the phase look-up table needs to be updated. When the combined efficiency is decreased slightly, the signal generation complexity can be reduced by half. Based on DEAl-BOC, we present the interlacing dual-sideband enhanced alternative BOC (IDEAl-BOC) modulation. The main advantage is that IDEAl-BOC can improve further the combined efficiency while keeping power ratio constant, this means IDEAl-BOC can reach higher combined efficiency than AltBOC for the case of equal power ratio.


Constant envelope modulation Power ratio AltBOC IDEAl-BOC GNSS 


  1. 1.
    European Union, European GNSS (Galileo) (2010) Open service signal in space interface control document, OS SIS ICD, Issue 1, pp 4–7Google Scholar
  2. 2.
    Lestarquit L, Artaud G, Issler J-L (2008). AltBOC for dummies or everything you always wanted to know about AltBOC. In: Proceedings of the 21st international technical meeting of the satellite division of the institute of navigation, pp 961–970Google Scholar
  3. 3.
    ZuPing T, HongWei Z, XiuLin H YiHang R, YuQi L, YanLin Z (2010) Research on performance evaluation of compass signal. Scientia Sinica Phys Mech Astron 40(5):592–602Google Scholar
  4. 4.
    Dafesh PA, Cahn CR (2011) Application of POCET method to combine gnss signals at different carrier frequencies. In: Proceedings of the 24th international technical meeting of the satellite division of the institute of navigation (ION GNSS 2011), pp 1201–1206Google Scholar
  5. 5.
    ZuPing T, HongWei Z, JiaoLong Wei (2011) TD-AltBOC: a new compass B2 modulation. Sci China-Phys Mech Astron 54(6):P1014–P1021CrossRefGoogle Scholar
  6. 6.
    Shivaramaiah NC, Dempster AG (2013) Time-multiplexed offset-carrier QPSK for GNSS. IEEE Trans Aerosp Electron Syst 49(2):1119–1138CrossRefGoogle Scholar
  7. 7.
    Yao Z, Lu M (2012) Dual-frequency constant envelope multiplex with non-equal power allocation for GNSS. Electron Lett 48(25):1624–1625CrossRefMathSciNetGoogle Scholar
  8. 8.
    Yao Z, Lu M (2013) Constant envelope combination for components on different carrier frequencies with unequal power allocation. In: Proceedings of the 2013 international technical meeting of the institute of navigation, San Diego, pp 629–637Google Scholar
  9. 9.
    Yao Z, Lu M (2013) ACED multiplexing and its application on BeiDou B2 band. In: Proceedings of China satellite navigation conference (CSNC 2013), Lecture notes in electrical engineering, vol 244, pp 25–34Google Scholar
  10. 10.
    Zhang Kai (2013) Generalized constant-envelope dual QPSK and altBOC modulations for modern GNSS signals. Electron Lett 49(21):1335–1337CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Tao Yan
    • 1
  • Jiaolong Wei
    • 1
    Email author
  • Zuping Tang
    • 1
  • Bo Qu
    • 1
  • Zhihui Zhou
    • 1
  1. 1.The Department of Electronic and Information EngineeringHuazhong University of Science and TechnologyWuhanChina

Personalised recommendations