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首页> 外文会议>IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications vol.2; 20050808-12; Beijing(CN) >Performance of Multi-carrier CDMA system based on Complex Orthogonal Wavelet Packet in Nakagami-m Fading Channels
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Performance of Multi-carrier CDMA system based on Complex Orthogonal Wavelet Packet in Nakagami-m Fading Channels

机译：Nakagami-m衰落信道中基于复正交小波包的多载波CDMA系统性能

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摘要

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.
机译：在分析多载波CDMA原理的基础上，利用优化的复正交小波包，提出了一种基于复正交小波包的MC-CDMA系统（COWP-MC-CDMA）。我们分别在中上米衰落信道中利用EGC技术和MRC技术研究了系统的下行链路性能。并详细推导相应的误码率（BER）表达式。该系统可以克服由于插入循环前缀（CP）而导致的基于DFT的传统MC-CDMA（DFT-MC-CDMA）的频谱效率的降低。理论分析和仿真结果表明，COWP-MC-CDMA系统的性能优于DFT-MC-CDMA以及基于实小波包的MC-CDMA（RWP MC CDMA）系统，它具有出色的抵抗多径衰落和多址干扰的能力（ MAI）。此外，所提出的系统的BER性能略优于具有CP的常规MC-CDMA。

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