Variable spreading factor orthogonal polyphase codes for constant envelope OFDM-CDMA system

Author

Tsai, Yingming ; Zhang, Guodong ; Wang, Xiaodong

Author_Institution

InterDigital Commun. Corp, Melville, NY

Volume

3

fYear

2006

fDate

3-6 April 2006

Firstpage

1396

Lastpage

1401

Abstract

Novel orthogonal polyphase codes with constant envelope design for OFDM-CDMA system are proposed in the paper. The proposed codes can support large number of users and variable spreading factor like Hadamard codes. Proposed orthogonal polyphase codes not only have better periodic auto- and cross correlations than Hadamard codes but also have constant envelope properties which is preferred for uplink/reverse link transmission. New transmitter and receiver architecture and MMSE receiver are proposed for the OFDM-CDMA system using the proposed polyphase codes. Simulation results show that OFDM-CDMA system using proposed polyphase codes has better PAPR and BER performance than OFDM-CDMA system using Hadamard codes and OFDMA system

Keywords

Hadamard codes; OFDM modulation; code division multiple access; error statistics; frequency division multiple access; least mean squares methods; radio links; BER; Hadamard codes; MMSE receiver; OFDM-CDMA system; OFDMA system; constant envelope system; orthogonal polyphase codes; reverse link transmission; transmitter; uplink link transmission; variable spreading factor codes; Error correction; Error correction codes; Fading; Intersymbol interference; Multiaccess communication; Multiple access interference; OFDM modulation; Peak to average power ratio; Time division multiple access; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2006. WCNC 2006. IEEE

Conference_Location

Las Vegas, NV

ISSN

1525-3511

Print_ISBN

1-4244-0269-7

Electronic_ISBN

1525-3511

Type

conf

DOI

10.1109/WCNC.2006.1696491

Filename

1696491