A novel iterative frequency domain equalization method is proposed for single-carrier(SC) based wireless systems operating over a time- and frequency-selective (or doubly-selective) channel. We adopt the basis expansion channel model (BEM) to approximate the doubly-selective channel with a set of Fourier exponentials. Using BEM, time-varying multipath interference is translated into inter-carrier-like interference in the frequency domain. We design a low-complexity iterative method which relies on sliding-window-based MMSE widely-linear filter with inter-carrier interference cancellation, and iterated time-domain soft-decisions. Simulations are shown to justify the validity of our approach and the results indicate that this approach outperforms the high-complexity linear block MMSE equalizer and other iterative approaches of similar complexity.
|Number of pages
|Published - 2004
|GLOBECOM'04 - IEEE Global Telecommunications Conference - Dallas, TX, United States
Duration: 29 Nov 2004 → 3 Dec 2004
|GLOBECOM'04 - IEEE Global Telecommunications Conference
|29/11/04 → 3/12/04