Pilot-assisted interference alignment in time-selective fading channels

The spectral efficiency achievable by IA (interference alignment) in a K-user interference channel is studied in the face of time-selective fading explicitly estimated through pilot-symbol observations. The robustness of IA is assessed through a joint optimization of the pilot overhead and the IA update interval, which are characterized-in the high-power conditions where IA is relevant-as solutions of a fixed-point equation.

[1]  Jeffrey G. Andrews,et al.  Fundamental Limits of Cooperation , 2012, IEEE Transactions on Information Theory.

[2]  Jeffrey G. Andrews,et al.  MIMO Interference Alignment Over Correlated Channels With Imperfect CSI , 2010, IEEE Transactions on Signal Processing.

[3]  Geordie George,et al.  System-level performance of distributed cooperation , 2012, 2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR).

[4]  Helmut Bölcskei,et al.  Interference alignment with limited feedback , 2009, 2009 IEEE International Symposium on Information Theory.

[5]  Syed A. Jafar,et al.  Interference Alignment: A New Look at Signal Dimensions in a Communication Network , 2011, Found. Trends Commun. Inf. Theory.

[6]  H. Vincent Poor,et al.  An introduction to signal detection and estimation (2nd ed.) , 1994 .

[7]  Federico Boccardi,et al.  System-level performance study of interference alignment in cellular systems with base-station coordination , 2012, 2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications - (PIMRC).

[8]  Mohammad Ali Maddah-Ali,et al.  Completely Stale Transmitter Channel State Information is Still Very Useful , 2010, IEEE Transactions on Information Theory.

[9]  S. Shamai,et al.  Fading channels: how perfect need "perfect side information" be? , 1999, Proceedings of the 1999 IEEE Information Theory and Communications Workshop (Cat. No. 99EX253).

[10]  Robert W. Heath,et al.  On the Overhead of Interference Alignment: Training, Feedback, and Cooperation , 2012, IEEE Transactions on Wireless Communications.

[11]  M. Guillaud,et al.  Cellular Interference Alignment with Imperfect Channel Knowledge , 2009, 2009 IEEE International Conference on Communications Workshops.

[12]  Antonia Maria Tulino,et al.  High-SNR power offset in multiantenna communication , 2005, IEEE Transactions on Information Theory.

[13]  Thomas L. Marzetta,et al.  BLAST training : Estimating Channel Characteristics for High-Capacity Space-Time Wireless , 1999 .

[14]  Markus Rupp,et al.  Interference alignment in UMTS Long Term Evolution , 2011, 2011 19th European Signal Processing Conference.