Title :
A M-ary biorthogonal code SS multicarrier CDMA transmission scheme
Author :
Xu, Xin ; Bai, Binfeng ; Cai, Yueming ; Qiao, Xiaoqiang ; Zhu, Rui
Author_Institution :
Inst. of Commun. Eng., PLAUST, Nanjing, China
Abstract :
In this paper a M-ary biorthogonal code spread-spectrum (SS) multicarrier code division multiple access (CDMA) transmission scheme is proposed. This scheme uses quadrature BPSK modulation and biorthogonal SS code to take data; channel estimation eliminates the ambiguities of amplitude and phase generated by channel fading, and avoids the identification problem of the single/dual SS code. In comparison with conventional multicarrier CDMA system, this scheme highly increases the data rate of up to 2 log/sub 2/ M times. Meanwhile, simulations are performed with the improved subspace tracking and least squares (LS) channel estimation algorithm in the case of different combining schemes, and show good system performance.
Keywords :
channel estimation; code division multiple access; fading channels; least squares approximations; quadrature phase shift keying; spread spectrum communication; M-ary biorthogonal code; channel estimation; channel fading; code division multiple access transmission scheme; least squares approximations; quadrature BPSK modulation; spread-spectrum multicarrier CDMA transmission scheme; Amplitude modulation; Binary phase shift keying; Channel estimation; Fading; Least squares approximation; Modulation coding; Multiaccess communication; Multicarrier code division multiple access; Phase modulation; Spread spectrum communication;
Conference_Titel :
Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
0-7803-7702-8
DOI :
10.1109/ICNNSP.2003.1279363
