Acta Metallurgica Sinica(English letters) ›› 2009, Vol. 16 ›› Issue (2): 39-41.doi: 10.1016/S1005-8885(08)60199-5

• Wireless • Previous Articles     Next Articles

Design of sequence set with group-wise zero correlation window

WANG Yang-zhi, XU Cheng-qian   

  1. College of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-04-30
  • Contact: WANG Yang-zhi

Abstract:

Zero correlation window (ZCW) or zero correlation zone (ZCZ) sequence can be used in quasi-synchronous code division multiple access (QS-CDMA) system to eliminate multiple access and multipath interferences. However, as the length of ZCW or ZCZ increases, fewer sequences are available. Recently, a new concept, sequence set with group-wise zero correlation window is introduced, which can increase the number of available sequences for a QS-CDMA system. In this article, a new method for generating sequence set with group-wise zero correlation window is presented. This method is based on a Hadamard matrix of size N×N and a pair of Hadamard matrices of size M×M. Compared with previous methods, the proposed sequence set has a group-wise zero correlation window for both periodic and aperiodic cross-correlation functions.

Key words:

ZCW;group-wise zero correlation window;multiuser detection;Hadamard matrix