Efficient Channel Estimation Techniques for Amplify and Forward Relaying Systems
Journal article, 2012

In this paper, we present a channel estimation scheme for Amplify-and-Forward (AF) relaying systems, using measurements at the destination only. A Least-Squares (LS) based channel estimation algorithm is developed, that provides the destination with full knowledge of all channel responses involved in the transmission. To investigate the algorithm performance, the Cramer-Rao lower bound (CRB) is analytically computed and compared with the asymptotic covariance of the proposed estimator. Since the existing estimator does not reach the CRB, we also propose and analyze an improved algorithm by taking into account the noise characteristics via weighted LS (WLS). The improved algorithm is asymptotically efficient, since it attains the CRB as the SNR tends to infinity.

performance analysis

relay

Estimation

least squares (LS)

Author

Panagiota Lioliou

Chalmers, Signals and Systems, Signalbehandling och medicinsk teknik, Signal Processing

Mats Viberg

Chalmers, Signals and Systems, Signalbehandling och medicinsk teknik, Signal Processing

Mikael Coldrey

Ericsson AB

IEEE Transactions on Communications

1558-0857 (ISSN)

Vol. 60 11 3150-3155

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/TCOMM.2012.081512.110088A

More information

Latest update

11/19/2018