Turbo decision aided equalization for magnetic recording channels

Author

Wu, Zi-Ning ; Cioffi, John M.

Author_Institution

Marvell Semicond. Inc., Sunnyvale, CA, USA

fYear

1999

fDate

6/21/1905 12:00:00 AM

Firstpage

733

Abstract

Applying turbo codes to intersymbol interference (ISI) channels requires a soft a posteriori probability (APP) detector for channel inputs. The complexity of conventional APP detectors grows exponentially with the channel memory length. In this paper we present a new APP module for binary ISI channels based on decision aided equalization (DAE), whose complexity grows linearly with the channel memory length. The reduction of channel detection complexity reaches 95% for a five-tap ISI channel. Simulations performed on the MEEPR4 channel show close to optimum performance for this turbo-DAE structure

Keywords

channel coding; computational complexity; digital magnetic recording; equalisers; intersymbol interference; turbo codes; APP detector; ISI channels; MEEPR4 channel; channel detection complexity reduction; channel memory length; decision aided equalization; intersymbol interference; magnetic recording channels; soft a posteriori probability detector; turbo codes; AWGN; Decision feedback equalizers; Detectors; Intersymbol interference; Iterative algorithms; Iterative decoding; Magnetic recording; Performance gain; Quantum computing; Turbo codes;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1999. GLOBECOM '99

Conference_Location

Rio de Janeireo

Print_ISBN

0-7803-5796-5

Type

conf

DOI

10.1109/GLOCOM.1999.830160

Filename

830160