Title :
Analysis of error sequences for PRML and EPRML signaling performed over Lorentzian channel
Author :
Karabed, Razmik ; Nazari, Nersi
Author_Institution :
GEC Plessey Semicond., Scotts Valley, CA, USA
Abstract :
It is well-known that PRML and EPRML signaling systems applied to digital magnetic recording suffer in performance due to noise correlation at the output of the channel equalizer. We analyze the error sequences for PRML and EPRML equalized Lorentzian channel in order to determine the channel performance. It is shown that an exact expression for the performance of these channels, in terms of the minimum distance error sequence, can be found. These expressions takes into account the correlation of noise due to equalization. A rigorous analysis of the error sequences is performed to compute the system performance degradations due to noise correlation. The exact expressions for the equalization filter and the output of the low pass filter both in time and frequency domains are also calculated
Keywords :
Gaussian noise; Viterbi detection; correlation methods; digital magnetic recording; equalisers; error analysis; filtering theory; low-pass filters; partial response channels; random noise; sequences; EPRML signaling; Lorentzian channel; PRML signaling; Viterbi detection; channel equalizer output; channel performance; digital magnetic recording; equalization filter; exact expression; frequency domain; low pass filter; minimum distance error sequence; noise correlation; time domain; Communication system signaling; Digital magnetic recording; Equalizers; Error analysis; Low pass filters; Magnetic analysis; Magnetic noise; Performance analysis; Signal analysis; System performance;
Conference_Titel :
Global Telecommunications Conference, 1996. GLOBECOM '96. 'Communications: The Key to Global Prosperity
Conference_Location :
London
Print_ISBN :
0-7803-3336-5
DOI :
10.1109/GLOCOM.1996.594391
