Time-Multiplexed Training for Time-Selective Channels

Pilot-assisted channel estimation is considered in this letter, where the channel is assumed to be time-selective and can be accurately fit by a basis expansion model. The position and power of the pilots are crucial to the mean square error of the channel estimator. In this paper, we present nonlinear integer programming algorithms to optimize the position and power of the pilots. In comparison with the traditional equi-distant/powered pilot structure, the solution obtained from the proposed algorithms yields a better performance.

[1]  Philip Schniter,et al.  MSE-optimal training for linear time-varying channels , 2005, Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005..

[2]  Aditya Dua,et al.  Receive antenna selection in MIMO systems using convex optimization , 2006, IEEE Transactions on Wireless Communications.

[3]  Kalyanmoy Deb,et al.  A combined genetic adaptive search (GeneAS) for engineering design , 1996 .

[4]  Deva K. Borah,et al.  Frequency-selective fading channel estimation with a polynomial time-varying channel model , 1999, IEEE Trans. Commun..

[5]  Georgios B. Giannakis,et al.  Optimal training for block transmissions over doubly-selective fading channels , 2002, 2002 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[6]  Charles R. Johnson,et al.  Matrix analysis , 1985, Statistical Inference for Engineers and Data Scientists.

[7]  Mounir Ghogho,et al.  Pilot Design for MIMO OFDM Systems With Virtual Carriers , 2009, IEEE Transactions on Signal Processing.

[8]  Geert Leus,et al.  On the estimation of rapidly time-varying channels , 2004, 2004 12th European Signal Processing Conference.

[9]  W. Cheney,et al.  Numerical analysis: mathematics of scientific computing (2nd ed) , 1991 .

[10]  T. A. Thomas,et al.  Multi-user frequency-domain channel identification, interference suppression, and equalization for time-varying broadband wireless communications , 2000, Proceedings of the 2000 IEEE Sensor Array and Multichannel Signal Processing Workshop. SAM 2000 (Cat. No.00EX410).

[11]  Georgios B. Giannakis,et al.  Optimal training for block transmissions over doubly selective wireless fading channels , 2003, IEEE Trans. Signal Process..

[12]  R. Negi,et al.  Pilot Tone Selection For Channel Estimation In A Mobile Ofdm System * , 1998, International 1998 Conference on Consumer Electronics.

[13]  Stephen P. Boyd,et al.  Convex Optimization , 2004, Algorithms and Theory of Computation Handbook.

[14]  T. Zemen,et al.  Time-variant channel estimation using discrete prolate spheroidal sequences , 2005, IEEE Transactions on Signal Processing.

[15]  J. Douglas Faires,et al.  Numerical Analysis , 1981 .

[16]  Christodoulos A. Floudas,et al.  Nonlinear and Mixed-Integer Optimization , 1995 .