Title :
Fast convergence dual mode adaptive decision feedback equalization
Author_Institution :
Sch. of Electr. & Electron. Eng., Univ. of Nottingham, Semenyih
Abstract :
In this paper, we extend the blind adaptive equalization scheme of Labat, Macchi and Laot that starts up as a linear equalizer (LE) and switches into a decision feedback equalizer (DFE) once the channel eye is open. The modified scheme converges faster and switches more successfully to the DFE under severe equalization conditions such as short filter lengths and low signal-to-noise-ratios (SNR) even for a high-order modulation scheme, e.g., 64-QAM. This is achieved by employing the multi-modulus algorithm and a superior switching strategy. Monte Carlo simulations of a 64-QAM scheme verify the effectiveness of modified scheme.
Keywords :
Monte Carlo methods; adaptive equalisers; blind equalisers; decision feedback equalisers; quadrature amplitude modulation; 64-QAM scheme; Monte Carlo simulations; adaptive decision feedback equalization; blind adaptive equalization scheme; decision feedback equalizer; linear equalizer; multimodulus algorithm; signal-to-noise-ratios; switching strategy; Adaptive equalizers; Blind equalizers; Convergence; Decision feedback equalizers; Error analysis; Estimation error; Higher order statistics; Steady-state; Switches; Transversal filters; Blind equalization; SNR estimation; decision feedback equalization; symbol error rate;
Conference_Titel :
Information Technology, 2008. ITSim 2008. International Symposium on
Print_ISBN :
978-1-4244-2327-9
Electronic_ISBN :
978-1-4244-2328-6
DOI :
10.1109/ITSIM.2008.4632078
