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Channel estimation for the uplink of CDMA systems with linear MMSE estimators: Lower bounds and optimal sequences

 
: Wunder, G.; Stanczak, S.; Boche, H.

:

Simsa, J. ; Institute of Electrical and Electronics Engineers -IEEE-; Institution of Radio and Electronics Engineers -IREE-:
IEEE Seventh International Symposium on Spread Spectrum Techniques and Applications 2002. Proceedings : Prague, Czech Republic, 02.-05.09.2002
Piscataway, NJ: IEEE Operations Center, 2002
ISBN: 0-7803-7627-7
pp.34-38
International Symposium on Spread Spectrum Techniques and Applications (ISSSTA) <7, 2002, Prague>
English
Conference Paper
Fraunhofer HHI ()

Abstract
In this paper, we investigate a pilot-based channel estimation scheme for the uplink of CDMA systems. Assuming the linear minimum mean squared error (MMSE) estimator, we aim to minimize the "worst-case" MSE of all users by optimizing their channel-input sequences (pilot signals). We derive a lower bound on the "worst-case" MSE and show that the bound can be either met by constructing optimal sets or not depending on certain system parameters. In the latter case we construct sequences that we think have good properties.

: http://publica.fraunhofer.de/documents/N-252115.html