Title :
Sensitivity of the mean-square DDFSD to a noisy estimate of the noise variance
Author :
Magarini, M. ; Spalvieri, A. ; Tartara, G.
Author_Institution :
Dipt. di Elettronica e Inf., Politecnico di Milano, Italy
fDate :
6/23/1905 12:00:00 AM
Abstract :
In signal equalization, a suboptimal technique for reducing the number of states of the Viterbi detector is the delayed decision feedback sequence detector (DDFSD). In order to achieve good performance a mean-square (MS) prefilter is employed before the DDFSD. This paper is devoted to investigate the sensitivity of the MS-DDFSD to a noisy estimate of the variance of the noise. Analytical performance evaluation is addressed. A truncated version of the union bound is used to approximate the bit error rate. The analysis includes a method for determining the terms that dominate the bound
Keywords :
Viterbi detection; decision feedback equalisers; delays; digital radio; error statistics; intersymbol interference; land mobile radio; mean square error methods; multipath channels; noise; optimisation; time-varying channels; DDFSD; ISI equalization; MS-DDFSD; Viterbi detector; bit error rate; delayed decision feedback sequence detector; digital mobile radio channels; intersymbol interference; mean-square DDFSD; mean-square prefilter; noise variance; noisy estimate; performance evaluation; signal equalization; suboptimal technique; time-varying multipath propagation; union bound; Closed-form solution; Decision feedback equalizers; Delay; Detectors; Intersymbol interference; Matched filters; Maximum likelihood detection; Performance analysis; State feedback; Viterbi algorithm;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.956901
