Title :
Novel Robust BPE-IWLMS Blind Equalizer for Phase Shift-Keying Signals
Author :
Wu, Hsiao-Chun ; Yan, Kun
Author_Institution :
Dept. of Electr. & Comput. Eng., Louisiana State Univ., Baton Rouge, LA, USA
Abstract :
Blind equalization for high-order modulated signals is difficult to combat since the corresponding probability density functions are very complex. The conventional constant modulus algorithm (CMA) is simple but not robust when the modulation order is high. In this paper, we design a novel preprocessor involving signal selection and blind pose estimation such that our previously proposed iterative weighted least-mean-square (IWLMS) blind equalization algorithm only for BPSK and QPSK signals can be adopted for any arbitrary PSK signal constellation. The simulation results show that our proposed new BPE-IWLMS method greatly outperforms the CMA.
Keywords :
blind equalisers; iterative methods; least mean squares methods; phase shift keying; BPE-IWLMS blind equalizer; BPSK signals; QPSK signals; arbitrary PSK signal constellation; blind pose estimation; constant modulus algorithm; high-order modulated signals; iterative weighted least-mean-square blind equalization algorithm; phase shift-keying signals; signal selection; Algorithm design and analysis; Binary phase shift keying; Blind equalizers; Constellation diagram; Iterative algorithms; Phase shift keying; Probability density function; Quadrature phase shift keying; Robustness; Signal design;
Conference_Titel :
Communications (ICC), 2010 IEEE International Conference on
Conference_Location :
Cape Town
Print_ISBN :
978-1-4244-6402-9
DOI :
10.1109/ICC.2010.5502678