Modeling Fading Channel-Estimation Errors in Pilot-Symbol-Assisted Systems, With Application to Turbo Codes
Journal article, 2005

In this paper, we address the issue of imperfect channel estimation in coded systems on fading channels. Since performance of channel codes is influenced in different ways by different components of channel-estimation errors, we develop a simplified model which separates the estimation errors of a Wiener-filtered received signal into the amplitude error and the phase error. Based on the model, we derive tight bounds on component error variances. Moreover, we prove that the classical Wiener filter results in a biased estimate of the channel amplitude. We also show that the probability of having a phase-estimation error large enough to cause decision errors in the receiver is significant. Using our model, we derive an approximate upper limit on the optimum pilot-symbol spacing and approximate lower limit on bit-error rate performance of coded systems with a given pilot-symbol separation. The proposed model and derivations are confirmed by extensive simulations. © 2005 IEEE.

wireless-ip

error-control

Author

Bartosz Mielczarek

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Arne Svensson

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

IEEE Transactions on Communications

0090-6778 (ISSN)

Vol. 53 11 1822-1832

Subject Categories

Computer and Information Science

DOI

10.1109/TCOMM.2005.858669

More information

Created

10/7/2017