Efficient channel estimation based on discrete cosine transform

Yen Hui Yeh*, Sau-Gee Chen

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

25 Scopus citations


Channel impairment caused by multi-path reflections can deeply degrade the transmission efficiency in wireless communication systems. Based on the property of the channel frequency response and the concept of interpolation, in this paper a DCT-based pilot-aided channel estimator for orthogonal frequency division multiplexing is proposed. This approach can mitigate the aliasing effect in the DFT-based channel estimator when there is non-sample-spaced path delay. Compared with DFT-based estimator, DCT-based estimator significantly improves the performance with a comparable complexity. In addition, a noise reduction scheme is introduced and combined with the estimator. In implementation, the DCT-based estimator has the advantages of utilizing mature fast DCT algorithms and compatible FFT algorithms, which is favorable to other matrix-based channel estimation methods.

Original languageEnglish
Pages (from-to)676-679
Number of pages4
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
StatePublished - 25 Sep 2003
Event2003 IEEE International Conference on Accoustics, Speech, and Signal Processing - Hong Kong, Hong Kong
Duration: 6 Apr 200310 Apr 2003

Fingerprint Dive into the research topics of 'Efficient channel estimation based on discrete cosine transform'. Together they form a unique fingerprint.

Cite this