General Method to Construct LS Codes by Complete Complementary Sequences

Chao ZHANG  Xiaokang LIN  Shigeki YAMADA  Mitsutoshi HATORI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B    No.8    pp.3484-3487
Publication Date: 2005/08/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.8.3484
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
LAS-CDMA,  LS codes,  complete complementary sequences,  ZCZ,  

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Summary: 
Large Area Synchronized (LAS)-CDMA, actually composed of LA codes and pulse compressing LS codes, has been proposed as a most promising scheme in 3G and 4G wireless communications. LS codes are famous for the Zero Correlation Zone (ZCZ) in the auto-correlation and cross-correlation functions, which endows the codes with the capability to perfectly reduce the Multiple Access Interference (MAI) and Inter Symbol Interference (ISI) if the maximum transmission delay is less than the length of ZCZ. In this letter, we provide a general and systematic method to construct LS codes from the set of complete complementary sequences. Our method is much more general than the ordinary LS construction method revealed previously.