Title :
Performance studies of a multiband multicarrier CDMA system with a simplified receiver structure using despreader before equalizer
Author :
Madhukumar, A.S. ; Peng, Xiaoming ; Lei, Zhongding ; Chin, Francois
Author_Institution :
Sch. of Comput. Eng., Nanyang Technol. Univ., Singapore
Abstract :
This paper proposes a multiband multicarrier CDMA system with a simplified receiver structure for downlink transmission. An adaptive algorithm is proposed for allocating multiple subbands for users based on their channel gain and usage. The band allocation algorithm together with adaptive modulation can considerably increase the system capacity. A simplified receiver structure intended to reduce the complexity of channel equalizer-despreader structure of conventional multicarrier CDMA system is also proposed. The combined system is extensively simulated for different channel parameters and the results are discussed.
Keywords :
adaptive modulation; bandwidth allocation; code division multiple access; equalisers; receivers; adaptive algorithm; adaptive modulation; channel equalizer-despreader structure; channel gain; channel parameter; code division multiple access; downlink transmission; multiband multicarrier CDMA system; multiple subband allocation; receiver structure; system capacity increment; Adaptive algorithm; Bit rate; Digital audio broadcasting; Equalizers; Fading; Frequency; Multiaccess communication; Narrowband; Paper technology; Radio transmitters;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. 14th IEEE Proceedings on
Print_ISBN :
0-7803-7822-9
DOI :
10.1109/PIMRC.2003.1259205
