Abstract
A semi-blind channel estimation algorithm based on subspace approach for orthogonal frequency division multiplexing (OFDM) systems over the frequency-selective channel is proposed. A linear precoding is applied on each block before the IFFT operation and a low-rank structure is created in the received signal. Then subspace properties can be exploited to identify the channel up to a scalar ambiguity. The residual scalar ambiguities eliminated by inserting pilots into data stream. Simulation results illustrate the performance of the proposed semi-blind algorithm.
| Original language | English |
|---|---|
| Pages (from-to) | 320-322 |
| Number of pages | 3 |
| Journal | Journal of Beijing Institute of Technology (English Edition) |
| Volume | 15 |
| Issue number | 3 |
| Publication status | Published - Sept 2006 |
Keywords
- Linear precoding
- Orthogonal frequency division multiplexing (OFDM)
- Semi-blind channel estimation
- Subspace approach