Experimental study of signal dependent noise in perpendicular recording

• DOI: 10.1063/1.1557765
• Publication Date: 2003-05-15T23:33:55Z
• Authors: Wenzhong Zhu; Jian Chen; David Kaiser; Jack Judy; Dean Palmer
• Keywords: SIGNAL (programming language); Linear density; Echo (communications protocol); Experimental data

The extracted dipulse technique, or pseudorandom sequence method, has been used to determine the dependence of noise upon signal. Four main types echo are identified. A simple model is developed and simulated waveforms substantiate physical interpretation pulse. takes into account most significant eigenmodes obtained from experimental dibit data at different linear densities using a Karhunen–Loeve expansion. calculations agree very well low density up high where supralinear occurs.