Punctured convolutional coded PR4ML system in digital magnetic recording
Yoshihiro Okamoto, Minoru Souma, Hidetoshi Saito, Hisashi Osawa · Electronics and Communications in Japan (Part II Electronics) · 1998
A punctured convolutional coded PR4ML system for digital magnetic recording is proposed. In this system, convolutional coding is used for recording and two-track coded recording is carried out after using the punctured method. In this study, the error rate performance was simulated by a computer to compare this system with the conventional I-NRZI coded PR4ML system. Our system was found to have superior characteristics in high-density recording, and an error rate of 10−4 could be achieved for a normalized linear density of K = 3, even when the SN ratio was about 3.8 dB lower at the reading point than in the conventional system. © 1998 Scripta Technica, Electron Comm Jpn Pt 2, 81(9): 62–70, 1998