2×2 X信道和PTP信道并存网络的自由度

郭倩倩; 刘锋; 曾连荪; 覃闻铭

doi:10.13700/j.bh.1001-5965.2015.0696

2×2 X信道和PTP信道并存网络的自由度

doi: 10.13700/j.bh.1001-5965.2015.0696

上海海事大学信息工程学院, 上海 201306

基金项目: 国家自然科学基金（61271283，61472237，61401270）；交通运输部应用基础研究项目（2015329810030）；上海市教委科研创新基金（14YZ113）

详细信息

作者简介:
郭倩倩,女,硕士研究生。主要研究方向:无线通信与网络。E-mail:1491538684@qq.com;刘锋,男,博士,讲师。主要研究方向:无线通信与网络。Tel.:021-38282863,E-mail:liufeng@shmtu.edu.cn;曾连荪,男,教授,硕士生导师。主要研究方向:定位导航系统Tel.:021-38282863,E-mail:lszeng@shmtu.edu.cn

通讯作者:
刘锋,Tel.:021-38282863,E-mail:liufeng@shmtu.edu.cn

中图分类号: TN929.5
计量
- 文章访问数: 953
- HTML全文浏览量: 136
- PDF下载量: 662
- 被引次数: 0
出版历程
- 收稿日期: 2015-10-27
- 修回日期: 2015-12-18
- 网络出版日期: 2016-11-20

Degrees of freedom of networks with coexistence of 2×2 X channel and point-to-point channel

Department of Information Engineering, Shanghai Maritime University, Shanghai 201306, China

摘要

摘要: 自由度（DOF）是一个空间复用概念，是在多天线系统中引入的，体现了无线信道对空间资源的利用效率。在认知无线电中，由于主、次网络会相互干扰，从而会降低DOF。本文主要研究的是2×2 X信道（XC）和点对点（PTP）信道并存时网络的DOF。研究结论也适合于XC优先于PTP信道的情况。在已知发送端信道状态（CSI）信息的前提下，基于符号扩展模型，利用渐进干扰对齐方法给出了对应的信号处理方案，并证明当n趋于无穷大时，自由度内界可达5/3。利用传播时延模型示范了其可达性。此外，分析了DOF上界。
- X信道(XC) /
- 点对点(PTP)信道 /
- 信道并存 /
- 渐进干扰对齐 /
- 自由度(DOF)
Abstract: Degrees of freedom (DOF) is a spatial multiplexing conception, which was introduced in multiple antenna systems. And it characterizes the utilization efficiency of spatial resource for wireless channels. In the area of cognitive radio, since the primary and secondary networks interfere with each other, the DOF will be reduced. This paper mainly studies the DOF of the network on 2×2 X channel (XC) and point-to-point (PTP) channel which coexist. The result of this paper is also applied to the scenario when the XC has priority over PTP channel. If channel state information (CSI) is available at all transmitters, we propose the signal processing scheme using asymptotic interference alignment approach based on symbol extension model. It is shown that the lower bound of DOF tends to 5/3 when n tends to infinity. A propagation delay model is used to show its achievability. In addition, we analyze the upper bound on the DOF.
- X channel (XC) /
- point-to-point (PTP) channel /
- channel coexistence /
- asymptotic interference alignment /
- degrees of freedom (DOF)

HTML全文

参考文献(16)

[1]	CADAMBE V R,JAFAR S A.Interference alignment and degrees of freedom of the K-user interference channel[J].IEEE Transactions on Information Theory,2008,54(8):3425-3441.
[2]	JAFAR S A,SHAMAI S.Degrees of freedom region of the MIMO X channel[J].IEEE Transactions on Information Theory,2008,54(1):151-170.
[3]	YETIS C M,GOU T,JAFAR S A,et al.Feasibility conditions for interference alignment[C]//Global Telecommunications Conference,2009(GLOBECOM 2009).Piscataway,NJ:IEEE Press,2009:1-6.
[4]	HUANG C,JAFAR S A.Degrees of freedom of the MIMO interference channel with cooperation and cognition[J].IEEE Transactions on Information Theory,2009,55(9):4211-4220.
[5]	CADAMBE V R,JAFAR S A.Interference alignment and the degrees of freedom of wireless X networks[J].IEEE Transactions on Information Theory,2009,55(9):3893-3908.
[6]	周璐娜,刘锋,曾连荪.两个点对点(PTP)网络并存时的自由度研究[J].计算机科学,2015,42(1):110-112.ZHOU L N,LIU F,ZENG L S.Research on degrees of freedom of two PTP networks coexistence[J].Computer Science,2015,42(1):110-112(in Chinese).
[7]	KIM J,PARK S H,SUNG H,et al.Sum rate analysis of two-cell MIMO broadcast channels:Spatial multiplexing gain[C]//IEEE International Conference on Communications (ICC),2010.Piscataway,NJ:IEEE Press,2010:1-5.
[8]	SHIN W,LEE N,LIM J B,et al.On the design of interference alignment scheme for two-cell MIMO interfering broadcast channels[J].IEEE Transactions on Wireless Communications,2011,10(2):437-442.
[9]	LEE N,SHIN W,HEATH R W,et al.Interference alignment with limited feedback for two-cell interfering MIMO-MAC[C]//International Symposium on Wireless Communication Systems (ISWCS).Piscataway,NJ:IEEE Press,2012:566-570.
[10]	周璐娜,刘锋,曾连荪.CSIT对无线MIMO网络自由度的影响[J].计算机应用研究,2014,31(12):3813-3817.ZHOU L N,LIU F,ZENG L S.Influence of CSIT on degrees of freedom of wireless MIMO networks[J].Application Research of Computer,2014,31(12):3813-3817(in Chinese).
[11]	TRESCH R,GUILLAUD M,RIEGLER E.On the achievability of interference alignment in the K-user constant MIMO interference channel[C]//IEEE/SP 15th Workshop on Statistical Signal Processing,2009(SSP'09).Piscataway,NJ:IEEE Press,2009:277-280.
[12]	JAFAR S A,FAKHEREDDIN M J.Degrees of freedom for the MIMO interference channel[J].IEEE Transactions on Information Theory,2007,53(7):2637-2642.
[13]	ABDOLI M J,GHASEMI A,KHANDANI A K.On the degrees of freedom of K-user SISO interference and X channels with delayed CSIT[J].IEEE Transactions on Information Theory,2013,59(10):6542-6561.
[14]	LU Y,WEI Z.On degrees of freedom region of three-user MIMO interference channels[J].IEEE Transactions on Signal Processing,2015,63(3):590-603.
[15]	GOU T G,JAFAR S A.Degrees of freedom of the K user M×N MIMO interference channel[J].IEEE Transactions on Information Theory,2010,56(12):6040-6057.
[16]	LEE N,LIM J B,CHUN J.Degree of freedom of the MIMO Y channel:Signal space alignment for network coding[J].IEEE Transactions on Information Theory,2010,56(7):3332-3342.