基于迭代分组均衡的SC-FDMA-IDMA非正交多址接入系统

doi:10.3969/j.issn.1000-436x.2014.08.007

通信学报 ›› 2014, Vol. 35 ›› Issue (8): 48-55.doi: 10.3969/j.issn.1000-436x.2014.08.007

基于迭代分组均衡的SC-FDMA-IDMA非正交多址接入系统

刘德良^1,²,黄强³,徐大专²

¹ 中国人民解放军理工大学通信工程学院，江苏南京 210007
² 南京航空航天大学信息科学与技术学院，江苏南京 210007
³ 中国电子科技集团第二十八研究所，江苏南京 210007

出版日期:2014-08-25 发布日期:2017-06-29
基金资助:
国家自然科学基金资助项目

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

De-liang LIU^1,²,Qiang HUANG³,Da-zhuan XU²

¹ Institute of Communication Engineering, PLA University of Science and Technology, Nanjing 210007, China
² Institute of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210007, China
³ CETC 28, Nanjing 210007, China

Online:2014-08-25 Published:2017-06-29
Supported by:
The National Natural Science Foundation of China

摘要/Abstract

摘要：

SC-FDMA-IDMA非正交多址接入结合了SC-FDMA和IDMA 2种技术，这种结合使SC-FDMA-IDMA有可能继承这2种技术各自不同的优点，例如容量大、峰平功率比（PAPR）低、多用户信号检测简单等。但由于用户信号采用SC-FDMA这种特殊的单载波调制方式进行传输，当信道的频率选择性比较严重时，系统性能将快速下降。为此推导了适应于SC-FDMA-IDMA系统的迭代分组判决反馈均衡（IB-DFE）算法，以提高系统抗频率选择性衰落的能力。仿真研究表明，采用IB-DFE均衡算法后，相对于采用高阶调制的单用户SC-FDMA系统，在相同的传输效率下采用低阶调制的多用户SC-FDMA-IDMA系统的性能有了很大的提高。

关键词: SC-FDMA-IDMA, 多用户检测, 迭代分组判决反馈均衡

Abstract:

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 de-tection. 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 it-erative 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 sin-gle-user SC-FDMA system with high-order modulation, the multiuser SC-FDMA-IDMA system with low-order modula-tion has great performance improvement after adopting the IB-DFE algorithm on condition that these two systems have the same transmission efficiency.

Key words: SC-FDMA-IDMA, multiuser detection, IB-DFE

刘德良,黄强,徐大专. 基于迭代分组均衡的SC-FDMA-IDMA非正交多址接入系统[J]. 通信学报, 2014, 35(8): 48-55.

De-liang LIU,Qiang HUANG,Da-zhuan XU. Non-orthogonal multiple-access system SC-FDMA-IDMA with iterative block equalization[J]. Journal on Communications, 2014, 35(8): 48-55.

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基于迭代分组均衡的SC-FDMA-IDMA非正交多址接入系统

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

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