Fast Initialization of an MMSE Equalizer for Faster than Nyquist Signaling

Jae-Hyok LEE  Yong-Hwan LEE  

IEICE TRANSACTIONS on Communications   Vol.E85-B   No.5   pp.951-955
Publication Date: 2002/05/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Wireless Communications Issue)
equalization,  MMSE,  faster than Nyquist signaling,  

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We consider equalizer initialization problems when the transmitted symbol rate is higher than the available channel bandwidth. In this case, the coefficients of an adaptive equalizer in the receiver can be updated only once per a predefined symbol period, requiring unacceptably long training time. The training time can be reduced significantly if the equalizer begins the training process from a properly initialized condition. In this letter, a fast initialization method is analytically designed for a minimum mean squared error (MMSE) type equalizer. Finally, the initialization performance is verified by computer simulation.