Advanced

Joint Pilot and Data Loading Technique for MIMO Systems Operating with Covariance Feedback

Digham, F; Mehta, N B; Molisch, Andreas LU and Zhang, J (2004) 5th IEEE International Conference on 3G Communication Technologies In Fifth IEE International Conference on 3G Mobile Communication Technologies, 2004. 3G 2004. p.24-28
Abstract
We consider a multiple input multiple output (MIMO) system wherein channel correlation as well as noisy channel estimation are both taken into account. For a given block fading duration, pilot-assisted channel estimation is carried out with the aid of a minimum mean square error estimator. The pilot sequences and data are jointly optimized to maximize the ergodic capacity while fulfilling a total transmit energy constraint. Using the optimization results, we study the effect of various system parameters and different types of channel knowledge. We show that systems with channel covariance knowledge and imperfect channel estimates can even outperform those with perfect channel estimation at the receiver, but without any channel knowledge at... (More)
We consider a multiple input multiple output (MIMO) system wherein channel correlation as well as noisy channel estimation are both taken into account. For a given block fading duration, pilot-assisted channel estimation is carried out with the aid of a minimum mean square error estimator. The pilot sequences and data are jointly optimized to maximize the ergodic capacity while fulfilling a total transmit energy constraint. Using the optimization results, we study the effect of various system parameters and different types of channel knowledge. We show that systems with channel covariance knowledge and imperfect channel estimates can even outperform those with perfect channel estimation at the receiver, but without any channel knowledge at the transmitter. Further, we show that the signal to noise ratio and the block fading duration determine the qualitative behavior of ergodic capacity as a function of antenna spacing or angular spread. Finally, we find that the optimum pilot-to-data power ratio is always greater than one. It increases as the total transmit power decreases or as the block fading length increases. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
3G mobile communication, MIMO systems, channel capacity, channel estimation, data communication, fading channels, least mean squares methods, optimisation, receiving antennas, transmitting antennas
in
Fifth IEE International Conference on 3G Mobile Communication Technologies, 2004. 3G 2004.
pages
24 - 28
conference name
5th IEEE International Conference on 3G Communication Technologies
external identifiers
  • scopus:27644473647
ISBN
0-86341-388-9
language
English
LU publication?
yes
id
387c451a-72c9-4752-8671-6bfc502dc206 (old id 600679)
alternative location
http://ieeexplore.ieee.org/iel5/9803/30912/01434429.pdf?tp=&isnumber=&arnumber=1434429
date added to LUP
2007-12-05 15:15:26
date last changed
2017-02-19 04:36:18
@inproceedings{387c451a-72c9-4752-8671-6bfc502dc206,
  abstract     = {We consider a multiple input multiple output (MIMO) system wherein channel correlation as well as noisy channel estimation are both taken into account. For a given block fading duration, pilot-assisted channel estimation is carried out with the aid of a minimum mean square error estimator. The pilot sequences and data are jointly optimized to maximize the ergodic capacity while fulfilling a total transmit energy constraint. Using the optimization results, we study the effect of various system parameters and different types of channel knowledge. We show that systems with channel covariance knowledge and imperfect channel estimates can even outperform those with perfect channel estimation at the receiver, but without any channel knowledge at the transmitter. Further, we show that the signal to noise ratio and the block fading duration determine the qualitative behavior of ergodic capacity as a function of antenna spacing or angular spread. Finally, we find that the optimum pilot-to-data power ratio is always greater than one. It increases as the total transmit power decreases or as the block fading length increases.},
  author       = {Digham, F and Mehta, N B and Molisch, Andreas and Zhang, J},
  booktitle    = {Fifth IEE International Conference on 3G Mobile Communication Technologies, 2004. 3G 2004.},
  isbn         = {0-86341-388-9},
  keyword      = {3G mobile communication,MIMO systems,channel capacity,channel estimation,data communication,fading channels,least mean squares methods,optimisation,receiving antennas,transmitting antennas},
  language     = {eng},
  pages        = {24--28},
  title        = {Joint Pilot and Data Loading Technique for MIMO Systems Operating with Covariance Feedback},
  year         = {2004},
}