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 |
|---|---|
| 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