Title :
Performance of multi-carrier CDMA system based on complex orthogonal wavelet packet in Nakagami-m fading channels
Author :
Yu, Xiangbin ; Xu, Dazhuan ; Bi, Guangguo
Author_Institution :
Inf. & Commun. Eng. Postdoctoral Res. Station, Nanjing Univ. of Aeronaut. & Astronaut.
Abstract :
Based on the analysis of the principle of multi-carrier CDMA and the use of optimized complex orthogonal wavelet packet, a complex orthogonal wavelet packet based MC-CDMA system (COWP-MC-CDMA) is proposed in this paper. We investigate the system downlink performance with EGC technique and MRC technique in Nakagami-m fading channels, respectively; and derive corresponding bit error rate (BER) expression in detail. The system may overcome the decrease of spectrum efficiency of DFT based conventional MC-CDMA (DFT-MC-CDMA) due to inserting cyclic prefix (CP). Theoretical analysis and simulation results show the COWP-MC-CDMA system outperforms DFT-MC-CDMA as well as real wavelet packet based MC-CDMA (RWP-MC-CDMA) system, it has superior ability to combat multi-path fading and multiaccess interference (MAI). Moreover, the BER performance of proposed system is slightly superior to that of the conventional MC-CDMA with CP
Keywords :
Nakagami channels; code division multiple access; discrete Fourier transforms; diversity reception; error statistics; radio links; radiofrequency interference; BER; COWP; DFT; EGC technique; MAI; MC-CDMA system; MRC technique; Nakagami-m fading channel; bit error rate; complex orthogonal wavelet packet; discrete Fourier transform; downlink performance; equal-gain combining; maximum-ratio combining; multiaccess interference; multicarrier code division multiple access; optimisation; Bit error rate; Downlink; Fading; Intersymbol interference; Mobile communication; Multiaccess communication; Multicarrier code division multiple access; Radio transmitters; Wavelet analysis; Wavelet packets;
Conference_Titel :
Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2005. MAPE 2005. IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
0-7803-9128-4
DOI :
10.1109/MAPE.2005.1618219
