Comparison of SC-FDMA and HSUPA in the Return-Link of Evolved S-UMTS Architecture

S. Janaaththanan, C. Kasparis, B. Evans
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引用次数: 8

Abstract

Single carrier frequency division multiple access (SC-FDMA), a multiple access technique similar to orthogonal frequency division multiple access (OFDMA), presently features as a strong candidate in the return link of the long time evolution (LTE) of T-UMTS. In the satellite domain there is an emerging research interest in extending mobile broadcasting system architectures that include complementary ground components, in providing bi-directional data services to mobile users. In such 'evolved S-UMTS' architecture, compatibility with current (CDMA based) and future (OFDMA/SC-FDMA) based) T-UMTS physical layer techniques is of high relevance, if satellite networks are to assume a complementary role to terrestrial ones. In this paper, we first give an overview of SC-FDMA and then compare, via simulations, the performance of the technique with that of the WCDMA-based high speed uplink packet access (HSUPA) that has been defined in release 6 of T-UMTS. The performance evaluations are performed over channels that are representative of the evolved S-UMTS architectures. Emphasis in the study is also given to realistic channel estimation and taking into account the effects of the amplifier's non-linearity. Other elements addressed in this paper are the impact of linearization techniques, and the pilot channel design in order to achieve robust estimation in the presence of non-linear channels.
SC-FDMA与HSUPA在演进S-UMTS架构回程链路中的比较
单载波频分多址(SC-FDMA)是一种类似于正交频分多址(OFDMA)的多址技术,目前是T-UMTS长时间演进(LTE)回程链路的有力候选技术。在卫星领域,有一个新兴的研究兴趣是扩展移动广播系统架构,包括互补的地面组件,向移动用户提供双向数据服务。在这种“进化的S-UMTS”架构中,如果卫星网络要承担对地面网络的补充作用,那么与当前(基于CDMA的)和未来(基于OFDMA/SC-FDMA的)T-UMTS物理层技术的兼容性是高度相关的。在本文中,我们首先概述了SC-FDMA,然后通过仿真比较了该技术与基于wcdma的高速上行分组接入(HSUPA)的性能,HSUPA已在T-UMTS版本6中定义。性能评估是在代表已发展的S-UMTS体系结构的通道上执行的。研究的重点还包括现实信道估计和考虑放大器非线性的影响。本文讨论的其他因素是线性化技术的影响,以及导频信道设计,以便在非线性信道存在时实现鲁棒估计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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