2D orthogonal spreading codes for multicarrier DS-CDMA systems

Author

Yang, Chia-Ming ; Lin, Pei-Hsuan ; Yang, Guu-Chang ; Kwong, Wing C.

Author_Institution

Dept. of Electr. Eng., Nat. Chung-Hsing Univ., Taichung, Taiwan

Volume

5

fYear

2003

fDate

11-15 May 2003

Firstpage

3277

Abstract

This paper presents two new constructions of two-dimensional (2D) spreading codes, here designated as 2D orthogonal variable spreading factor (OVSF) codes, for multicarrier direct-sequence code-division multiple-access (MC/DS-CDMA) systems. Orthogonality of these spreading codes is employed to improve the bandwidth efficiency and interference rejection capability of the DS-CDMA systems. The 2D OVSF codes are constructed by generalizing one-dimensional (1D) OVSF codes and they possess ideal correlation properties. As illustrated in this paper, these 2D OVSF cods preserve the orthogonality of different spreading factors in an OVSF code tree, supporting multimedia services with a variety of data rates.

Keywords

3G mobile communication; code division multiple access; codes; interference suppression; radiofrequency interference; spread spectrum communication; 2D orthogonal variable spreading factor codes; 3G mobile communication; bandwidth efficiency; direct-sequence code-division multiple-access; interference rejection; multicarrier DS-CDMA systems; multimedia services; tree structure; 3G mobile communication; Autocorrelation; Bandwidth; Downlink; Frequency; Interference suppression; Multiaccess communication; Multiple access interference; Narrowband; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2003. ICC '03. IEEE International Conference on

Print_ISBN

0-7803-7802-4

Type

conf

DOI

10.1109/ICC.2003.1204049

Filename

1204049