Abstract
In this paper, we propose an adaptive frequency domain channel estimation method based on a modified Kalman filtering, which requires low pilot overhead, for estimating and tracking time-varying channel in orthogonal frequency division multiplexing (OFDM) systems. The proposed frequency domain Kalman filtering channel estimation achieves the minimum pilot overhead by exploiting periodically inserted pilot symbols and decision directed symbols between them. The pilot overhead efficiency and tracking performance of the proposed method is studied through simulation. Simulation results show that the proposed method has adequate tracking performance with a pilot overhead of below 5%.
Original language | English |
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Pages (from-to) | 107-114 |
Number of pages | 8 |
Journal | International Journal of Control and Automation |
Volume | 5 |
Issue number | 2 |
Publication status | Published - 2012 Jun 1 |
Keywords
- Adaptive channel estimation
- Kalman filter
- Orthogonal frequency division multiplexing (OFDM)
- Time-varying channel
ASJC Scopus subject areas
- Control and Systems Engineering