Maximum likelihood combining for MC-CDMA

Author

Wu, Zhiqiang ; Nassar, Carl R. ; Lu, Suihua

Author_Institution

Dept. of Electr. & Comput. Eng., Colorado State Univ., Fort Collins, CO, USA

Volume

3

fYear

2002

fDate

6/24/1905 12:00:00 AM

Firstpage

1293

Abstract

This paper proposes a novel maximum likelihood combining (MLC) scheme for MC-CDMA systems. Currently, minimized mean square error combining (MMSEC) is widely considered the best combining scheme for MC-CDMA. The MLC proposed in this paper is optimal from the standpoint of minimizing the probability of error performance. It is shown that MLC is very close to MMSEC in a fully loaded system, justifying the selection of MMSEC over other combining schemes. Moreover, when the load is small (as measured by number of users), MLC is shown to outperform MMSEC (and, other combining schemes).

Keywords

code division multiple access; error statistics; least mean squares methods; maximum likelihood detection; mobile radio; MC-CDMA; MLC scheme; MMSEC; error probability; maximum likelihood combining; minimized mean square error combining; performance; Diversity reception; Fading; Frequency diversity; Mean square error methods; Multiaccess communication; Multicarrier code division multiple access; Multiple access interference; Narrowband; Signal to noise ratio; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th

Print_ISBN

0-7803-7484-3

Type

conf

DOI

10.1109/VTC.2002.1002824

Filename

1002824