Design of 16-QAM ZCZ sequences for AS-CDMA communication systems using the 16-QAM constellation

Author

Zeng, Fanxin ; Zhang, Zhenyu

Author_Institution

Department of Information Engineering, Chongqing Communication Institute, 400035, China

fYear

2010

fDate

4-6 Dec. 2010

Firstpage

1980

Lastpage

1984

Abstract

It is pointed out that when a communication system makes use of sequences over the quadrature amplitude modulation (QAM) constellation as its spreading sequences, in comparison with the traditional spreading sequences with the same length of sequences, the transmission data rate (TDR) of the system by applying to the former is several multiples of one by using the latter. In this paper, two families of 16-QAM ZCZ sequences are presented, and the resultant sequences can arrive at the theoretical bound on the ZCZ sequences under their own conditions. When the proposed sequences are employed by an AS-CDMA communication system using the 16-QAM constellation as spreading sequences, the high TDR of the system holds without both multiple access interference (MAI) and multi-path interference (MPI).

Keywords

Correlation; Interference; Multiaccess communication; Multiple access interference; Quadrature amplitude modulation; Synchronization; 16-QAM sequence; AS-CDMA; quadriphase sequence; theoretical bound; zero correlation zone (ZCZ);

fLanguage

English

Publisher

ieee

Conference_Titel

Information Science and Engineering (ICISE), 2010 2nd International Conference on

Conference_Location

Hangzhou, China

Print_ISBN

978-1-4244-7616-9

Type

conf

DOI

10.1109/ICISE.2010.5689774

Filename

5689774