M-ary system using complete complementary sequences composed of 4-phase orthogonal sequences

Author

Kawamoto, Junichiro ; Suehiro, Naoki ; Torii, Hideyuki ; Kuroyanagi, Noriyoshi ; Fan, Pingzhi

Author_Institution

Graduate Sch. of Eng., Tsukuba Univ., Ibaraki, Japan

Volume

1

fYear

2001

fDate

4-7 July 2001

Firstpage

191

Abstract

Enlarged periodic complete complementary sequences have properties as follows: the value of the sum of periodic autocorrelation functions is zero at all shifts, except for zero shift, and the value of the sum of periodic crosscorrelation functions is zero at all shifts. If we use these properties for an approximately synchronized CDMA system, there is no cochannel interference nor influence of multipath. In this paper, in order to realize an M-ary system with periodic complete complementary sequences, we research the properties of the sum of the periodic auto/crosscorrelation functions of these sequences. As a result we can divide these sequences into four groups.

Keywords

code division multiple access; functions; sequences; 4-phase orthogonal sequences; M-ary system; approximately synchronized CDMA system; periodic autocorrelation functions; periodic complete complementary sequences; periodic crosscorrelation functions; Autocorrelation; Frequency synchronization; Interchannel interference; Mobile communication; Multiaccess communication; Signal design; Spread spectrum communication;

fLanguage

English

Publisher

ieee

Conference_Titel

EUROCON'2001, Trends in Communications, International Conference on.

Conference_Location

Bratislava, Slovakia

Print_ISBN

0-7803-6490-2

Type

conf

DOI

10.1109/EURCON.2001.937793

Filename

937793