Abstract
A time domain channel estimation method in MIMO-OFDM systems by tracking the delay-subspace is proposed. The time impulse response is estimated by transmitting known pilot symbols, and the estimation performance is improved by the Givens rotation based delay-subspace tracking and amplitudes tracking based on the LMS filtering. Simulations proved that the time domain channel estimation by tracking the delay-subspace can track faster fading channels, and is more accurate and yet of low complexity.
Original language | English |
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Pages (from-to) | 636-640 |
Number of pages | 5 |
Journal | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
Volume | 27 |
Issue number | 7 |
Publication status | Published - Jul 2007 |
Keywords
- Low rank adaptive filter
- Multi-input multi-output (MIMO)
- Orthogonal frequency division multiplexing (OFDM)
- Subspace tracking