A novel high bandwidth efficiency interference alignment scheme based on continuous phase modulation

被引：0
作者：
Wu, Zhilu [1 ]
Jiang, Lihui [1 ]
Ren, Guanghui [1 ]
Wang, Gangyi [2 ]
机构：
[1] School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin
[2] School of Instrumentation Science and Opto-Electronics Engineering, Beihang University, Beijing
来源：
Journal of Communications | 2015年 / 10卷 / 04期
关键词：
Bandwidth efficiency; Bit error rate (BER); Continuous phase modulation; Interference alignment; Pulse amplitude modulated (PAM) decomposition; Spatial-frequency domain;
D O I：
10.12720/jcm.10.4.268-275
中图分类号：
学科分类号：
摘要：
Interference alignment (IA) is an emerging technique which can suppress the interference effectually and provides a means to approach the channel capacity in the multiple-input and multiple-output (MIMO) networks. However, little work has concentrated on the bandwidth efficiency of IA systems, which is undoubtedly important especially in the current situations of spectrum scarcity. In this paper, a novel IA scheme is proposed, which leverages the advanced continuous phase modulation (CPM) to increase the bandwidth efficiency. Due to the continuity of the information-bearing phase, the proposed CPM-IA scheme exhibits low sidelobe and rapid spectrum rolloff. Moreover, a low-complexity pulse amplitude modulated (PAM) decomposition algorithm is applied to CPM-IA scheme, which can reduce the number of matched filters without much performance degradation. In addition, a novel spatial-frequency domain (SFD)-CPM-IA scheme is proposed to mitigate the interference that the traditional IA cannot handle when the IA feasibility condition cannot be satisfied. The proposed SFD-CPM-IA scheme inherits the high bandwidth efficiency of CPM-IA, and can accommodate many more users to communicate simultaneously. © 2015 Journal of Communications.
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页码：268 / 275
页数：7
相关论文
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