Title :
Folding Viterbi detector with reduced complexity for EPRML system applications
Author :
Ki, Hoon-Jae ; Lee, Cheon-Su ; Song, Moon-Ho ; Kim, Soo-Won
Author_Institution :
Sch. of Electr. Eng., Korea Univ., Seoul, South Korea
fDate :
2/17/2000 12:00:00 AM
Abstract :
A folding Viterbi detector (FVD) is proposed, which has the usual state transition diagram folded with inverted states. Since most trellis-coded signals have symmetrical transition diagrams, if folded appropriately, branch metrics will appear when an add or subtract operation is carried out. In this scheme, one adder/subtracter replaces two adders. Compared with the EPR4 GVA detector, which requires eight adders, the proposed FVD requires only five adder/subtractors and the total gate count is reduced by 38% without BER performance degradation
Keywords :
Viterbi detection; digital magnetic recording; magnetic disc storage; maximum likelihood detection; partial response channels; BER performance; EPRML system applications; adder/subtracter; branch metrics; complexity reduction; extended PRML system; folding Viterbi detector; high density recording systems; inverted states; state transition diagram; symmetrical transition diagrams; trellis-coded signals;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20000297
