Comparison of equalization techniques in a wavelet packets based multicarrier modulation DS-CDMA system

Author

Zhang, Yifeng ; Dill, Jeflrey

Author_Institution

Bus. Line Wireless Connectivity Group, Philips Semicond., Sunnyvale, CA, USA

Volume

4

fYear

1999

fDate

6/21/1905 12:00:00 AM

Firstpage

2152

Abstract

In this paper, we propose a novel CDMA system, the wavelet packet based multicarrier modulation CDMA system. Such a system can achieve robust performance against multipath fading due to the time-frequency adaptivity of wavelet packets. Equal gain combining and maximal ratio combining equalization techniques for such a system are compared in a slow fading frequency selective Rayleigh fading channel under both perfectly synchronized and asynchronous conditions. Our results show that under both situations, the maximal ratio combining has better bit error rate performance than that of the equal gain combining

Keywords

Rayleigh channels; adaptive modulation; code division multiple access; equalisers; error statistics; synchronisation; wavelet transforms; DS-CDMA system; Rayleigh fading channel; asynchronous conditions; bit error rate performance; equal gain combining; equalization techniques; frequency selective channel; maximal ratio combining; multicarrier modulation; multipath fading; perfectly synchronized conditions; slow fading channel; time-frequency adaptivity; wavelet packets; Bit error rate; Diversity reception; Fading; Frequency synchronization; Multiaccess communication; Performance gain; Rayleigh channels; Robustness; Time frequency analysis; Wavelet packets;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1999. GLOBECOM '99

Conference_Location

Rio de Janeireo

Print_ISBN

0-7803-5796-5

Type

conf

DOI

10.1109/GLOCOM.1999.827585

Filename

827585