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Ιδρυματικό Αποθετήριο [SANDBOX]
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
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| URI: | http://purl.tuc.gr/dl/dias/41D1A071-60CF-44A6-A69F-7F4DA99F67FD | ||
| Έτος | 2001 | ||
| Τύπος | Πλήρης Δημοσίευση σε Συνέδριο | ||
| Άδεια Χρήσης |
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| Βιβλιογραφική Αναφορά | A. P. Liavas .(2001).On the robustness of the finite-length MMSE-DFE with respect to channel and second-order statistics estimation errors.Presented at IEEE Workshop on Statistical Signal Processing.[online].Available:http://www.telecom.tuc.gr/Greek/Liavas/publications/On%20the%20Robustness%20of%20the%20Finite-Length%20MMSE-DFE%20With%20Respect%20to%20Channel%20and%20Second-Order%20Statistics%20Estimation%20Errors.pdf | ||
| Εμφανίζεται στις Συλλογές |
The finite-length minimum mean square errordecision-feedback equalizer (MMSE-DFE) is an efficient structuremitigating intersymbol interference (ISI) introduced by practicallyall communication channels at high-enough symbol rates. The filtersconstituting the MMSE-DFE, as well as related performancemeasures, can be computed by assuming perfect knowledge of thechannel impulse response and the input and noise second-orderstatistics (SOS). In practice, we estimate the unknown quantities,and thus, inevitable estimation errors arise. In this paper, wemodel the estimation errors as small perturbations, and we derivea second-order approximation to the excess MSE. Furthermore,we derive second-order approximations to the mean excess MSEin terms of the parameter estimation error covariance matricesand simple and informative bounds, revealing the factors thatgovern the behavior of MMSE-DFE under mismatch. Simulationsconfirm that the derived second-order approximations provideaccurate estimates of the MMSE-DFE performance degradationdue to mismatch
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