Title :
An Interference-free MIMO-CDMA system Spread with Orthogonal Complementary Code for Multipath Fading Scenarios
Author :
Li, Jing ; Huang, Aiping ; Zhu, Jiangli
Author_Institution :
Inst. of Inf. & Commun. Eng., Zhejiang Univ., Hangzhou
Abstract :
To overcome the problem that the performance of traditional MIMO-CDMA system would degrade badly in frequency-selective fading channel conditions, a novel interference-free MIMO-CDMA system spread with orthogonal complementary (OC) code is proposed in the paper. The system utilizes a novel transmitter structure, which combines OC code spreading and spatial delay multiplexing technique. Therefore, only simple correlation operation is needed at the receiver to effectively resist interferences caused by multipath propagation effect, and maximum-ratio-combination (MRC) can be employed to further resist channel fading. The proposed system provides higher BER performance and lower hardware complexity, compared with traditional MIMO-CDMA system employing single-code spreading and VBLAST scheme. Mathematical expressions and theoretical analysis of the system are presented. Simulation results validate the perfect anti-interference properties of the proposed system
Keywords :
MIMO communication; code division multiple access; correlation methods; diversity reception; error statistics; fading channels; interference suppression; multipath channels; orthogonal codes; radiowave propagation; BER performance; MRC; bit error rate; code division multiple access; correlation operation; fading scenario; interference-free MIMO-CDMA system spread; maximum-ratio-combination; multipath propagation effect; multiple input multiple output; orthogonal complementary code; receiver; spatial delay multiplexing technique; transmitter structure; Bit error rate; Degradation; Delay; Frequency-selective fading channels; Hardware; Interference; MIMO; Multiaccess communication; Resists; Transmitting antennas;
Conference_Titel :
Communications, Circuits and Systems Proceedings, 2006 International Conference on
Conference_Location :
Guilin
Print_ISBN :
0-7803-9584-0
Electronic_ISBN :
0-7803-9585-9
DOI :
10.1109/ICCCAS.2006.284810
