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Blind identification of FIR systems driven by Markov-like input signals

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2 Author(s)
Afkhamie, K.H. ; Commun. Res. Lab., McMaster Univ., Hamilton, Ont., Canada ; Zhi-Quan Luo

We propose a new algorithm for the blind identification and equalization of finite impulse response (FIR) systems using the second-order statistics of the received signal. The new algorithm is set in the same context as the algorithms of Tong et al. (1994) and Moulines et al. (1995), however, unlike those earlier approaches it is designed to allow correlated input signals. Specifically, the algorithm accommodates finite memory sources and sources whose autocorrelation function decays exponentially. Numerical simulations compare the equalization performance of the new algorithm to those of Tong and Moulines. It is shown that our algorithm yields consistently lower bit-error rates at a wide variety of signal-to-noise ratios and at various equalizer lengths. Moreover, the algorithm maintains this advantage even if it has no a priori information of source correlation or if source symbols are uncorrelated

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Signal Processing, IEEE Transactions on  (Volume:48 ,  Issue: 6 )