A high rate matched spectral null code

Author

Noda, Makoto

Author_Institution

Adv. Dev. Labs., Sony Corp., Tokyo, Japan

Volume

34

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

1946

Lastpage

1948

Abstract

A new method to construct a sliding-block matched spectral null (MSN) code with a high code rate above 0.8 for the partial response class IV (PR4) channel is described. The method partially prunes a running digital sum (RDS) trellis in a novel manner, and is approximately 1.5 times as efficient in generating available codewords compared to a conventional RDS pruning method when their digital sum variations (DSV) are the same. Simulated results with Lorentzian channels showed that practical codes with rates of 12/14 and 24/27 constructed using this method had coding gains of approximately 1 dB and 1.5 dB, respectively, in their signal-to-noise ratio (SNR) compared with the conventional code with a rate of 12/15 at a user bit density of 2

Keywords

block codes; magnetic recording; partial response channels; trellis codes; 1 dB; 1.5 dB; Lorentzian channels; code rate; coding gains; digital sum variations; matched spectral null code; partial response class IV channel; running digital sum trellis; signal-to-noise ratio; sliding-block code; user bit density; Convolutional codes; Detectors; Laboratories; Signal to noise ratio;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.706752

Filename

706752