Acta Metallurgica Sinica(English letters) ›› 2015, Vol. 22 ›› Issue (5): 45-48.doi: 10.1016/S1005-8885(15)60679-3

• Wireless • Previous Articles     Next Articles

New constructions of quaternary low correlation zone sequence sets


  1. School of Computer Science and Software Engineering, Tianjin Polytechnic University, Tianjin 300387, China
  • Received:2014-12-01 Revised:2015-03-24 Online:2015-10-30 Published:2015-10-30
  • Contact: Xiu-Wen MA

Abstract: Sequence sets with low correlation have very important applications in modern communication systems. As in quasi-synchronous code-division multiple access (QS-CDMA) system, sequence sets with low correlation zone (LCZ) perform better than other well-known sequence sets. Furthermore, binary or quaternary sequence sets are preferred because of their easy implementation. In this paper, based on the inverse Gray mapping and special binary sequence pairs, new quaternary LCZ sequence sets were constructed. In the LCZ, the maximum of the nontrivial autocorrelation and crosscorrelation values is 1 which show that the QS-CDMA system used the new sequences sets can control the interference in a very low level.

Key words: quasi-synchronous code-division multiple access (QS-CDMA) system, quaternary sequence set, low correlation zone, inverse Gray mapping, binary sequence pair

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