Orthogonal frequency CDMA for broadband communications

Author

Wu, Shan Tsung ; Chen, Kwang Cheng

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

5

fYear

1999

fDate

1999

Firstpage

2890

Abstract

A general scheme called orthogonal frequency CDMA (OFCDMA) to describe CDMA using orthogonal carriers is proposed. Three well-known multicarrier CDMA schemes can be derived as special cases of the proposed OFCDMA if we appropriately define the signature waveforms and separation between adjacent carriers. We proceed with a unified analysis of OFCDMA to systematically understand the performance of these three schemes. Five types of interference can exist in a OFCDMA system under a multi-ray multipath fading channel. We compare the three schemes for each type of interference and discuss their pros and cons to help in designing effective OFCDMA receivers in interference-limited environments

Keywords

broadband networks; code division multiple access; fading channels; interference suppression; mobile radio; multipath channels; radio receivers; OFCDMA; adjacent carrier separation; broadband communications; interference-limited environments; mobile radio; multi-ray fading channel; multicarrier schemes; multipath fading channel; orthogonal frequency CDMA; performance; receivers; signature waveforms; Binary phase shift keying; Broadband communication; Fading; Frequency conversion; Interference; Multiaccess communication; Multicarrier code division multiple access; OFDM; Performance analysis; Radio transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th

Conference_Location

Amsterdam

ISSN

1090-3038

Print_ISBN

0-7803-5435-4

Type

conf

DOI

10.1109/VETECF.1999.800315

Filename

800315