Computer Science ›› 2015, Vol. 42 ›› Issue (9): 102-106.doi: 10.11896/j.issn.1002-137X.2015.09.021

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On Degrees of Freedom of Cognitive Networks from Point-to-Point Channel to Two-user Interference Channel

WANG Yuan-yuan, LIU Feng, ZENG Lian-sun and ZHANG You-jun   

  • Online:2018-11-14 Published:2018-11-14

Abstract: This paper investigated the degrees of freedom(DoF) of two cognitive networks,where the primary network is a two-user interference channel(IC),the secondary network is point-to-point channel(PTP),and the secondary network has cognition to the messages or signals of the primary network.Three cognition scenarios were considered:(1)PTP transmitter is cognitive of IC transmitters’ messages,(2)PTP receiver is cognitive of IC receivers’ signals,(3)PTP receiver is cognitive of IC transmitters’ messages.The inner bound of the DoF was obtained by using interference alignment and interference neutralization.Besides,the outer bound was proven.We found that inner and outer bound is tight and transmitter cognition can achieve higher DoF than receiver cognition.

Key words: Cognitive network,Degrees of freedom,Interference alignment,Interference neutralization

[1] Cadambe V R,Jafar S A.Interference Alignment and Spatial Degrees of Freedom for the K User Interference Channel[C]∥ICC.2008:971-975
[2] 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
[3] 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).IEEE,2009:277-280
[4] Yetis C M,Gou T,Jafar S A,et al.Feasibility conditions for interference alignment[C]∥Global Telecommunications Confe-rence,2009(GLOBECOM 2009).IEEE,2009:1-6
[5] Suh C,Tse D.Interference alignment for cellular networks[C]∥46th Annual Allerton Conference on Communication,Control,and Computing.IEEE,2008:1037-1044
[6] Bolcskei H,Thukral I J.Interference alignment with limitedfeedback[C]∥ IEEE International Symposium on Information Theory,2009(ISIT 2009).IEEE,2009:1759-1763
[7] Lee N,Lim J B,Chun J.Degrees of freedom of the MIMO Y channel:Signal space alignment for network coding[J].IEEE Transactions on Information Theory,2010,56(7):3332-3342
[8] Ning H,Ling C,Leung K K.Feasibility condition for interfe-rence alignment with diversity[J].IEEE Transactions on Information Theory,2011,57(5):2902-2912
[9] Gou T,Jafar S A,Wang C,et al.Aligned interference neutralization and the degrees of freedom of the 2×2×2 interference channel [J].IEEE Transactions on Information Theory,2012,58(7):4381-4395
[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,2014,1(12):3813-3817 Zhou Lu-na,Liu Feng,Zeng Lian-sun.Influence of CSIT on degrees of freedom of wireless MIMO networks[J].Application Research of Computer,2014,31(12):3813-3817
[11] 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.IEEE,2010:1-5
[12] Shin W,Lee N,Lim J B,et al.On the design of interferencealignment scheme for two-cell MIMO interfering broadcast channels[J].IEEE Transactions on Wireless Communications,2011,10(2):437-442
[13] 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).2012 IEEE,2012:566-570
[14] 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 Lu-na,Liu Feng,Zeng Lian-sun.Research on degrees of freedom of two PTP networks coexistence [J].Computer Science,2015,42(1):110-112
[15] Chaaban A,Sezgin A.Interference alignment and neutralization in a cognitive 3-user MAC-interference channel:degrees of freedom[C]∥12th Canadian Workshop on Information Theory(CWIT 2011).IEEE,2011:26-29
[16] 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
[17] Huang C,Jafar S A.Degrees of freedom of the MIMO interfe-rence channel with cooperation and cognition[J].IEEE Transactions on Information Theory,2009,55(9):4211-4220

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