Abstract
The performance of equalization in traditional OFDM system is greatly degraded in fast fading channel due to the intercarrier interference (ICI). This paper proposes an adaptive equalization algorithm for OFDM system based on fractional Fourier transform. In this method, the traditional Fourier transform is replaced by fractional Fourier transform to modulate and demodulate the symbols, and the received signals are equalized adaptively in the fractional Fourier domain. The algorithm for selecting the optimal order of fractional Fourier transform is given in this paper. Moreover, the adaptive equalization algorithm in fractional Fourier domain is derived. Theoretical analysis and numerical simulation results show that the proposed equalizer in optimal fractional Fourier domain can significantly improve the performance of OFDM system compared with Fourier domain equalizer.
| Original language | English |
|---|---|
| Pages (from-to) | 1728-1733 |
| Number of pages | 6 |
| Journal | Tien Tzu Hsueh Pao/Acta Electronica Sinica |
| Volume | 35 |
| Issue number | 9 |
| Publication status | Published - Sept 2007 |
Keywords
- Adaptive equalization
- Fractional Fourier transform
- OFDM