Title :
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
fDate :
6/21/1905 12:00:00 AM
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;
Conference_Titel :
Global Telecommunications Conference, 1999. GLOBECOM '99
Conference_Location :
Rio de Janeireo
Print_ISBN :
0-7803-5796-5
DOI :
10.1109/GLOCOM.1999.827585
