Non-orthogonal multiple-access system SC-FDMA-IDMA with iterative block equalization

被引：0
作者：
机构：
[1] Institute of Communication Engineering, PLA University of Science and Technology, Nanjing
[2] Institute of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing
[3] CETC 28, Nanjing
来源：
Liu, De-Liang | 1600年 / Editorial Board of Journal on Communications卷 / 35期
基金：
中国国家自然科学基金;
关键词：
IB-DFE; Multiuser detection; SC-FDMA-IDMA;
D O I：
10.3969/j.issn.1000-436x.2014.08.007
中图分类号：
学科分类号：
摘要：
As a new non-orthogonal multiple-access scheme, SC-FDMA-IDMA combines two technologies of SC-FDMA and IDMA together. This combination makes SC-FDMA-IDMA have the probability to inherit different advantages of these two technologies such as large system capacity, low peak-to-average power ratio (PAPR) and simple multiuser detection. However, because SC-FDMA for the transmission of different users' signal is a special form of single carrier modulation, the system performance may degrade quickly when the frequency selectivity of channel is serious. So the iterative block decision feedback equalization (IB-DFE) algorithm applied to the SC-FDMA-IDMA system is derived in order to enhance the ability of anti-frequency selective fading. Simulation results show that comparing with the single-user SC-FDMA system with high-order modulation, the multiuser SC-FDMA-IDMA system with low-order modulation has great performance improvement after adopting the IB-DFE algorithm on condition that these two systems have the same transmission efficiency.
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页码：48 / 55
页数：7
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