A threshold computation approach for the selection of additional pilot symbols

Authors:
Aykut Kalaycioğlu;H. Gökhan İlk
Affiliations:
Electronics Engineering Department, Faculty of Engineering, Ankara University, Turkey;Electronics Engineering Department, Faculty of Engineering, Ankara University, Turkey
Venue:
TELE-INFO'10 Proceedings of the 9th WSEAS international conference on Telecommunications and informatics
Year:
2010

Citing 2
Cited 0

Soft input channel estimation for turbo equalization

IEEE Transactions on Signal Processing - Part I
Iterative channel estimation and decoding of pilot symbol assisted turbo codes over flat-fading channels

IEEE Journal on Selected Areas in Communications

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Abstract

An adaptive threshold computation method for pilot symbol assisted iterative channel estimation in coded OFDM systems is considered. The proposed threshold computation method is based on calculating a particular threshold for each data packet in order to select the reliable decoder output symbols to improve the system bit error rate performance. The adaptive threshold computation approach utilizes the statistical properties of the decoder output symbol reliabilities. In an iterative manner, additional pilot symbols are established according to the computed threshold and the channel is re-estimated with the new pilots inserted to the known channel estimation pilot set. The proposed threshold computation method improves the system bit error rate performance in poor HF channel simulations.