On the Sum DoF of the Asymmetric Four-User MIMO Y Channel

被引：0

作者：

Liu, Kangqi ^{[1
]}

Tao, Meixia ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Dept Elect Engn, Shanghai, Peoples R China

来源：

2016 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) | 2016年

关键词：

ACHIEVABLE DEGREES; FREEDOM; ALIGNMENT;

D O I：

10.1109/ICC.2016.7511216

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This work studies the sum degrees of freedom (DoF) of the asymmetric four-user MIMO Y channel, where each user i, for 1 <= i <= 4, is equipped with Mi antennas, and the relay is equipped with N antennas. By using the genie message approach, we derive that the sum DoF is upper bounded by min {Sigma(4)(i= 1) Mi(,) 2 Sigma(4)(i= 2) M-i, 2N, 2/7 Sigma(for all i for all j> i) max{N, M-i + M-j}, where M-1 >= M-2 >= M-3 >= M-4. Then, we show that the bound is tight under certain antenna constraints using signal alignment, generalized signal alignment, and antenna deactivation techniques.

引用

页数：6

共 12 条

[1] Multi-way Communications: An Information Theoretic Perspective [J].

Chaaban, Anas ;

Sezgin, Aydin .

FOUNDATIONS AND TRENDS IN COMMUNICATIONS AND INFORMATION THEORY, 2015, 12 (3-4) :186-+

[2]

COVER TM, 1979, IEEE T INFORM THEORY, V25, P572, DOI 10.1109/TIT.1979.1056084

[3] Achievable Degrees of Freedom on K-user Y Channels [J].

Lee, Kwangwon ;

Lee, Namyoon ;

Lee, Inkyu .

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2012, 11 (03) :1210-1219

[4] Degrees of Freedom of the MIMO Y Channel: Signal Space Alignment for Network Coding [J].

Lee, Namyoon ;

Lim, Jong-Bu ;

Chun, Joohwan .

IEEE TRANSACTIONS ON INFORMATION THEORY, 2010, 56 (07) :3332-3342

[5]

Liu K., 2014, P IEEE GLOBECOM

[6] Generalized Signal Alignment: On the Achievable DoF for Multi-User MIMO Two-Way Relay Channels [J].

Liu, Kangqi ;

Tao, Meixia .

IEEE TRANSACTIONS ON INFORMATION THEORY, 2015, 61 (06) :3365-3386

[7] Achievable Degrees of Freedom for K-User MIMO Y Channels Using Signal Group Based Alignment [J].

Mu, Hua ;

Tugnait, Jitendra K. .

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2014, 13 (08) :4520-4533

[8] Degrees of Freedom for the MIMO Multi-Way Relay Channel [J].

Tian, Ye ;

Yener, Aylin .

IEEE TRANSACTIONS ON INFORMATION THEORY, 2014, 60 (05) :2495-2511

[9]

Wang CW, 2014, IEEE INT SYMP INFO, P2107, DOI 10.1109/ISIT.2014.6875205

[10] Degrees of Freedom of MIMO Multiway Relay Channel With Clustered Pairwise Exchange [J].

Wang, Rui ;

Yuan, Xiaojun ;

Tao, Meixia .

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, 2015, 33 (02) :337-351

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