一种采用串联正交/PN扩展方案的多载波CDMA系统

Won-Sik Youn, L. Freiberg, V. Bhargava
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引用次数: 1

摘要

直接顺序码分多址(DS-CDMA)是目前移动通信应用中备受关注的技术之一。它提供了合理的隐私和安全性,并具有良好的抗干扰和抗衰落能力。我们提出了一种结合多载波(MC)调制和DS-CDMA以及串联正交/伪噪声(PN)扩展的通信方案。该方案结合了DS-CDMA的优点和MC调制技术来对抗多径衰落信道的影响。研究了单相关器和最大比合成器的系统性能。在多用户多径瑞利/瑞利衰落环境下进行了性能分析。实验结果表明,该系统优于采用传统PN序列的MC-CDMA系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A multi-carrier CDMA system using a concatenated orthogonal/PN spreading scheme
Direct sequence code division multiple access (DS-CDMA) is currently of great interest for mobile communications applications. It provides reasonable privacy and security, and good immunity to interference and fading. We propose a new communication scheme combining both multi-carrier (MC) modulation and DS-CDMA with a concatenated orthogonal/pseudo-noise (PN) spreading scheme. This scheme incorporates the advantages of both DS-CDMA with a concatenated scheme, and an MC modulation technique to combat the effect of a multipath fading channel. The system performance is investigated for a single correlator and a maximal ratio combiner. The performance analysis is carried out under a multiuser and multipath Rayleigh/Rician fading environment. It is shown that the proposed system outperforms the MC-CDMA system with a conventional PN sequence.
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