Spatial Sensing and Cognitive Radio Communication in the Presence of a K-User Interference Primary Network

被引:11
作者
Alizadeh, Ardalan [1 ]
Bahrami, Hamid Reza [1 ]
Maleki, Mehdi [1 ]
Sastry, Shivakumar [1 ]
机构
[1] Univ Akron, Dept Elect & Comp Engn, Akron, OH 44325 USA
关键词
Cognitive radio; K-user MIMO interference channel; interference alignment; null space sensing; spatial holes; eigenvalue-based sensing; GLRT detector; ALIGNMENT; EIGENVALUE; FREEDOM; ALGORITHMS;
D O I
10.1109/JSAC.2014.2361073
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
We study the feasibility of cognitive radio (CR) communication in the presence of a K-user multi-input multi-output (MIMO) interference channel as the primary network. Assuming that the primary interference network has unused spatial degrees of freedom (DoFs), we first investigate the sufficient condition on the number of antennas at the secondary transmitter under which the secondary system can communicate while causing no interference to the primary receivers. We show that, to maximize the benefit, the secondary transmitter should have at least the same number of antennas as the spatial DoFs of the primary system. We then derive the secondary precoding and decoding matrices to have zero interference leakage into the primary network while the signal-to-interference plus noise ratio (SINR) at the secondary receiver is maximized. As the success of the secondary communication depends on the availability of unused DoFs, we then propose a fast sensing method based on the eigenvalue analysis of the received signal covariance matrix to determine the availability of unused DoFs or equivalently spatial holes. Since the proposed fast sensing method cannot identify the indices of inactive primary streams, we also provide a fine sensing method based on the generalized likelihood ratio test (GLRT) to decide the absence of individual primary streams. Simulation results show that the proposed CR sensing and transmission scheme can, in practice, provide a significant throughput while causing no interference to the primary receivers, and that the sensing detects the spatial holes of the primary network with high detection probability.
引用
收藏
页码:741 / 754
页数:14
相关论文
共 46 条
[1]   Joint optimization design for single underlay cognitive transceiver with channel uncertainty [J].
Abdelhamid, Bassant ;
Elsabrouty, Maha ;
Alghoniemy, Masoud ;
Elramly, Salwa ;
Muta, Osamu ;
Furukawa, Hiroshi .
IEICE COMMUNICATIONS EXPRESS, 2013, 2 (03) :111-117
[2]  
Abdelhamid B, 2012, 2012 IEEE SYMPOSIUM ON COMPUTERS AND COMMUNICATIONS (ISCC), P785, DOI 10.1109/ISCC.2012.6249395
[3]  
Abramowitz M, 1970, HDB MATH FUNCTIONS
[4]  
Abreu G, 2011, CONF REC ASILOMAR C, P1731, DOI 10.1109/ACSSC.2011.6190317
[5]   Optimal Beamforming in Two-Way Relay Networks with Cognitive Radio Capabilities [J].
Alizadeh, Ardalan ;
Sadough, Seyed Mohammad-Sajad .
IEICE TRANSACTIONS ON COMMUNICATIONS, 2011, E94B (11) :3089-3097
[6]   Optimal spectrum sensing in cooperative cognitive two-way relay networks [J].
Alizadeh, Ardalan ;
Sadough, Seyed Mohammad-Sajad .
IEICE ELECTRONICS EXPRESS, 2011, 8 (16) :1281-1286
[7]   Optimal Beamforming in Cognitive Two-way Relay Networks [J].
Alizadeh, Ardalan ;
Sadough, Seyed Mohammad-Sajad ;
Khajavi, Navid Tafaghodi .
2010 IEEE 21ST INTERNATIONAL SYMPOSIUM ON PERSONAL INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC), 2010, :2331-2335
[8]   Constrained Interference Alignment and the Spatial Degrees of Freedom of MIMO Cognitive Networks [J].
Amir, Mohamed ;
El-Keyi, Amr ;
Nafie, Mohammed .
IEEE TRANSACTIONS ON INFORMATION THEORY, 2011, 57 (05) :2994-3004
[9]  
[Anonymous], 2009, 102683V1 TR SOPH ANT
[10]  
[Anonymous], P IEEE S NEW FRONT D