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2D orthogonal spreading codes for multicarrier DS-CDMA systems

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4 Author(s)
Chia-Ming Yang ; Dept. of Electr. Eng., Nat. Chung-Hsing Univ., Taichung, Taiwan ; Pei-Hsuan Lin ; Guu-Chang Yang ; Kwong, W.C.

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.

Published in:
Communications, 2003. ICC '03. IEEE International Conference on  (Volume:5 )

Date of Conference: 11-15 May 2003

Page(s):
3277 - 3281 vol.5
Print ISBN:
0-7803-7802-4
INSPEC Accession Number:
7906161
Digital Object Identifier :
10.1109/ICC.2003.1204049
Product Type:
Conference Publications

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