Robust pilot detection techniques for channel estimation and symbol detection in OFDM systems
Document Type
Article
Publication Date
10-23-2015
Abstract
In this letter, we propose new frequency-domain pilot-multiplexing techniques (FDPMTs) for the channel estimation and equalization in orthogonal frequency-division multiplexing (OFDM) systems. A robust and effective pilot insertion and detection scheme is devised thereby. These pilot positions are optimally selected to minimize the distortion of the transmitted time-domain signal caused by the subcarrier-removal at the corresponding pilot positions. Besides, three different blind pilot-detection techniques are designed at the receiver without any a priori knowledge of the pilot positions, and the distorted data symbols can thus be iteratively reconstructed. Rigorous theoretical analysis and Monte Carlo simulation results both demonstrate that our proposed new OFDM system using dynamical pilot positions is more robust than the conventional OFDM system using the fixed pilot positions over multipath fading channels.
Publication Source (Journal or Book title)
IEEE Signal Processing Letters
First Page
733
Last Page
737
Recommended Citation
Zhang, H., & Wu, H. (2015). Robust pilot detection techniques for channel estimation and symbol detection in OFDM systems. IEEE Signal Processing Letters, 22 (6), 733-737. https://doi.org/10.1109/LSP.2014.2364924