分层异构无线网络中基于预编码的干扰抑制技术

doi:10.3969/j.issn.1000-0801.2013.06.006

电信科学 ›› 2013, Vol. 29 ›› Issue (6): 39-45.doi: 10.3969/j.issn.1000-0801.2013.06.006

• 专题：分层异构无线网络 • 上一篇下一篇

分层异构无线网络中基于预编码的干扰抑制技术

任品毅¹,杜清河^1,²,孙黎¹,徐大同¹

¹ 西安交通大学电子与信息工程学院西安710049
² 东南大学移动通信国家重点实验室南京210096

出版日期:2013-06-20 发布日期:2017-07-18
基金资助:
国家自然科学基金资助项目;国家科技重大专项基金资助项目;东南大学移动通信国家重点实验室开放研究基金资助项目;中央高校基本科研业务费专项资金资助项目

Precoding Based Interference Suppression for Heterogeneous Multi-Tiered Network

Pinyi Ren¹,Qinghe Du^1,²,Pinyi Sun¹,Datong Xu¹

¹ The School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
² National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China

Online:2013-06-20 Published:2017-07-18

摘要/Abstract

摘要：

传统宏蜂窝（macro cell）与低功率小蜂窝（small cell）共存的分层异构组网方案能有效地提高无线通信系统的容量。但宏蜂窝与小蜂窝间的同频干扰严重影响了通信质量，并阻碍了系统容量的进一步提升。近年来，利用MIMO预编码及空域衰落特性进行干扰抑制的相关技术成为新的研究热点。本文着重介绍分层异构无线网络中基于MIMO预编码的干扰抑制技术的研究进展。以典型的双层异构下行网络为例，分析了利用多天线预编码进行干扰抑制的基本方法，并在此基础上介绍了多种基于MIMO预编码的新型干扰抑制方案，最后讨论了分层异构网络中干扰抑制技术的未来研究方向。

关键词: 分层异构无线网络, MIMO预编码, 干扰抑制, 蜂窝通信网络

Abstract:

The coexistence of conventional marcro cells and lowpower small cells form the heterogeneous multi-tiered networks, which can significantly improve the capacity of wireless communications systems. However, the interferences between the marco cells and small cells due to sharing the same frequency band severely degrade the quality of communications and prevent the system capacity from being further enhanced. With the wide application of multiple-input-multiple-output（MIMO）for the 4th generation（4G）mobile communications systems, the interference suppression techniques using MIMO precoding and spatially fading properties have become an attracting and popular research area. The recent progress in the areas of MIMO precoding based interference suppression was introduced. Using the two tier downlink networks as the typical example scenario, the heterogeneous interference model was analyzed and that the key task for interference suppression which pointed out was to jointly design the precoding matrices at transmitters and the processing matrices at receivers and to solve for them in a successive order. Following this principle, several recently emerged MIMO-precoding schemes were further introduced. Finally, the future research direction for interference suppression over heterogenous multi-tiered networks was discussed.

Key words: hetergonous multi-tiered network, MIMO precoding, interference suppression, cellular communications network

任品毅,杜清河,孙黎,徐大同. 分层异构无线网络中基于预编码的干扰抑制技术[J]. 电信科学, 2013, 29(6): 39-45.

Pinyi Ren,Qinghe Du,Pinyi Sun,Datong Xu. Precoding Based Interference Suppression for Heterogeneous Multi-Tiered Network[J]. Telecommunications Science, 2013, 29(6): 39-45.

图/表 2

图1

表1

3种预编码方案特点对比"

	预编码矩阵、接收矩阵求解顺序	MU信号间干扰	SU信号对MU信号干扰	SU信号间干扰	MU信号对SU信号干扰	主要劣势
基于机会干扰对齐的预编码方案	Γ_n→Φ_k,u→W_n→G_k,u	完全消除	消除最强分量	消除最强分量	完全消除	小蜂窝任一时刻只服务一个用户
基于逐层干扰对齐的预编码方案	$Φ_{k, u} \to \begin{matrix} W_{n} \\ G_{k, u} \end{matrix} \to Γ_{n}$	完全消除	完全消除	完全消除	完全消除	设计方法针对个例，推广性受限
两步级联预编码方案	$\begin{matrix} Γ_{n}^{(1)} \\ Φ_{v}^{(1)} \end{matrix} \to \begin{matrix} Γ_{n}^{(1)} \\ Φ_{v}^{(1)} \end{matrix} \to \begin{matrix} W_{n} \\ G_{V} \end{matrix}$	完全消除	通过最大化SLNR抑制干扰功率	完全消除	限制干扰功率与有用信号功率之比	残留层间干扰

表1

参考文献 9

1	3GPP TR 36.932. Release 12. cenarios and Requirements for Small Cell Enhancements for E-UTRA and E-UTRAN, 2013
2	Nguyen T M , Jeong Y , Quek T , et al. Interference alignment in a poisson field of MIMO femto cells. IEEE Transactions on Wireless Communications, 2013(4): 1～13
3	Shin W , Lee N , QNoh W , et al. Hierarchical interference alignment for heterogeneous networks with multiple sntennas. Proceedings of Workshop of IEEE ICC'11, Kyoto, Japan, 2011
4	Xu D T , Ren P Y , Du Q H , et al. Two-tier interferences mitigation via CECRS precoding in cooperative femto cell networks. Proceedings of IEEE GLOBECOM 2013,Atlanta,CA,USA, 2013
5	Spencer Q H , Swindlehurst A L , Haardt M . Zero-forcing methods for downlink spatial multiplexing in multisuer MIMO channels. IEEE Transactions on Signal Processing, 200452(4): 461～471
6	Chen R H , Heath R W , Andrews J G . Transmit selection diversity for unitary precoded multiuser spatial multiplexing systems with linear receivers. IEEE Transactions on Signal Processing, 2007,55(3): 1159～1171
	Cadambe V R , Jafar S A . Interference alignment and degrees of freedom of the K-user interference channel. IEEE Transactions on Information Theory, 2008,54(8): 3425～3441
8	Ohwatari Y , Miki N , Asai T , et al. Performance of advanced receiver employing interference rejection combining to suppress inter-cell interference in LTE-Advanced downlink. Proceedings of IEEE VTC'11 Fall, San Francisco, California, USA, 2011
9	Goldsmith A . Wireless Communications. UK: Cambridge University Press, 2005

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分层异构无线网络中基于预编码的干扰抑制技术

Precoding Based Interference Suppression for Heterogeneous Multi-Tiered Network

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