Performance Analysis of Multiband Complex Wavelet Based MC-CDMA System with Space Diversity Combining in Rayleigh Fading Channel |
| |
Authors: | Xiangbin Yu Xiaodong Zhang Dazhuan Xu Guangguo Bi |
| |
Affiliation: | (1) Information and Communication Engineering Postdoctoral Research Station, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China;(2) National Mobile Communications Research Laboratory, Southeast University, Nanjing, 210096, China |
| |
Abstract: | In this paper, the multiband complex wavelet used as multi-carrier basis function is optimized. On the basis of analyzing
the principle of multi-carrier code division multiple access (MC-CDMA), a new multiband complex wavelet based MC-CDMA (MBCW-MC-CDMA)
system model is proposed, and space diversity combining (SDC) technique is employed to improve the system performance further.
The uplink performance of proposed MBCW-MC-CDMA system with SDC technique is investigated in Rayleigh fading channel, and
corresponding bit error rate (BER) analysis is given in detail. Without any cyclic prefix (CP), the system can avoid the decrease
of spectrum efficiency and data rate of conventional MC-CDMA with CP. By comparison, our scheme outperforms real wavelet packet
based MC-CDMA and slightly outperforms conventional MC-CDMA with CP via utilizing superior properties of the optimized multiband
complex wavelet. Theoretical analysis and simulation result show that the application of SDC technique can improve the proposed
system ability to combat spatial fading and various interferences effectively. Moreover, the proposed system based on SDC
technique has superior BER performance over conventional DFT and SDC based MC-CDMA system and real wavelet packet and SDC
based MC-CDMA system.
Xiangbin Yu received the M.S degrees in Communication and Information Systems from Hohai University, Nanjing, China, in 2001; and his
Ph.D. in Communication and Information Systems in 2004 from National Mobile Communications Research Laboratory at Southeast
University, China. Now he is working as a Postdoctoral Researcher in Information and Communication Engineering Postdoctoral
Research Station at Nanjing University of Aeronautics and Astronautics, Nanjing, China. His research interests include multi-carrier
digital communication, space-time coding and digital signal processing in modern communications.
Xiaodong Zhang received the M.S degrees from Nanjing University of Posts and Telecommunications, Nanjing, China, in 1998. In 2002, he received
the Ph.D. degree from Southeast University, Nanjing, China. His research interests include contemporary signal processing
and digital communications.
DaZhuan Xu received the M.S degrees and Ph.D. in Communication and Information Systems from Nanjing University of Aeronautics and Astronautics
in 1986 and 2001, respectively. He is now a full professor in Nanjing University of Aeronautics and Astronautics, Nanjing,
China. Prof.Xu is a Senior Member of China Institute of Electronics (CIE). His research interests include digital communications,
soft radio, coding theory, medical signal processing.
Guangguo BI was graduated from Nanjing Institute of Technology, Nanjing, China, in 1960. He is now a professor in the Department of Radio
Engineering of Southeast University, Nanjing, China. Prof.Bi is a fellow and a member of the board of Director of the China
Institute of Communications, and a senior member of IEEE. His research interests include digital communications, personal
communications network, spread spectrum communications, and intelligent information processing. He has published more than
200 papers in above areas. |
| |
Keywords: | multiband complex wavelet multi-carrier technique CDMA space diversity combining maximum ratio combining (MRC) |
本文献已被 SpringerLink 等数据库收录! |
|