[1] Yu Xiangbin, Xu Weiye, Bi Guangguo,. Performance analysis of complex wavelet packet basedmulticarrier CDMA system over Nakagami-m fading channels [J]. Journal of Southeast University (English Edition), 2004, 20 (2): 143-147. [doi:10.3969/j.issn.1003-7985.2004.02.003]

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Performance analysis of complex wavelet packet basedmulticarrier CDMA system over Nakagami-m fading channels()

基于复小波包的多载波CDMA系统 在Nakagami-m衰落信道下的性能

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

20

Issue:

2004 2

Page:

143-147

Research Field:

Information and Communication Engineering

Publishing date:

2004-06-30

Info

Title:

Performance analysis of complex wavelet packet basedmulticarrier CDMA system over Nakagami-m fading channels

基于复小波包的多载波CDMA系统 在Nakagami-m衰落信道下的性能

Author(s):

Yu Xiangbin¹;  Xu Weiye²;  Bi Guangguo¹

¹National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
²Department of Communication Engineering, Nanjing Institute of Technology, Nanjing 210013, China

虞湘宾¹;  徐伟业²;  毕光国¹

¹东南大学移动通信国家重点实验室, 南京 210096; ²南京工程学院通信工程系, 南京 210013

Keywords:

complex wavelet packet;  code division multiple access(CDMA);  multicarrier CDMA;  maximum ratio combining(MRC);  equal gain combining(EGC)

复小波包;  CDMA;  多载波CDMA;  最大比合并;  等增益合并

PACS:

TN911.5

DOI:

10.3969/j.issn.1003-7985.2004.02.003

Abstract:

On the basis of analyzing the principle of multicarrier code division multiple access(MC-CDMA), an optimized complex wavelet packet based MC-CDMA system(CWP-MC-CDMA)is proposed. The system performances with equal gain combining(EGC)technique and maximum ratio combining(MRC)technique in Nakagami-m fading channels are investigated, respectively; and the corresponding bit error rate(BER)expression is derived. The system can overcome the decrease of spectrum efficiency of discrete Fourier transform(DFT)based conventional MC-CDMA(DFT-MC-CDMA)due to inserting a cyclic prefix(CP). Theoretical analysis and simulation results show that the CWP-MC-CDMA system outperforms DFT-MC-CDMA as well as the real wavelet packet based MC-CDMA(RWP-MC-CDMA)system, it has superior ability to combat multi-path fading and multi-access interference(MAI). Moreover, the BER performance of the proposed system is also superior to that of the conventional MC-CDMA with CP.

在分析多载波码分多址(MC-CDMA)的原理基础上, 提出了一种基于复小波包的MC-CDMA系统. 同时, 研究了该系统分别采用等增益合并和最大比合并时在Nakagami-m衰落信道下的性能; 并推导了相应的误码率表达式. 该系统能克服通常MC-CDMA系统由于插入循环前缀(CP)所带来的频谱效率的下降. 理论分析和仿真结果表明:该系统要优于通常MC-CDMA系统和基于实小波包的MC-CDMA系统, 有着优越的抗多径衰落和多址干扰能力, 而且该系统也优于采用CP的通常MC-CDMA系统.

References:

[1] Sampath H, Taluar S, Tellado J, et al. A fourth-generation MIMO-OFDM broadband wireless system: design, perfor-mance, and field trial results [J]. IEEE Commun Mag, 2002, 40(9): 143-149.
[2] Haras S, Prasad R. Overview of multicarrier CDMA [J]. IEEE Commun Mag , 1997, 35(12): 126-133.
[3] Zhang Hongbing, Howard H, Lindsey A F. Wavelet packet waveforms for multicarrier CDMA communications [A]. In: IEEE Proc ICASSP’ 2002[C]. Orlando, USA, 2002(3): 2557-2560.
[4] Zhang Xiangdong, Xu Pingping, Bi Guangguo. OFDM scheme based on complex orthogonal wavelet packet [J]. Chinese Journal of Electronics, 2002, 11(2): 256-259.
[5] Prokis J G. Digital communications. 4th ed. [M]. New York: McGraw-Hill, 2001.
[6] Marvin K Simon, Alouini M-S. A unified approach to the performance analysis of digital communication over generalized fading channels [J]. Proceedings of the IEEE, 1998, 86(9): 1860-1877.

Memo

Memo:

Biographies: Yu Xiangbin(1972—), male, graduate; Bi Guangguo(corresponding author), male, professor, bigg@seu.edu.cn.

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