The multimodulus algorithm (MMA) for blind equalization has good performance, but can only tolerate small carrier frequency offsets under high-order QAM. We propose a structure for joint carrier recovery (CR) and blind decision-feedback equalization (DFE), where the DFE is MMA-based. It turns out that a key point is the design and analysis of reduced-constellation phase detectors (PDs) that can facilitate a wide frequency lock range and make the CR loop converge in severe intersymbol interference and noise. Based on this, we design a multistage startup procedure for joint blind DFE and CR. Simulations show that the procedure can yield fast convergence in large carrier frequency errors under high-order QAM.
|Number of pages||5|
|State||Published - 1 Dec 2004|
|Event||GLOBECOM'04 - IEEE Global Telecommunications Conference - Dallas, TX, United States|
Duration: 29 Nov 2004 → 3 Dec 2004
|Conference||GLOBECOM'04 - IEEE Global Telecommunications Conference|
|Period||29/11/04 → 3/12/04|