Non-linear signal receiver

Abstract

A non-linear signal receiver. The non-linear signal receiver for detecting an original data a from an input signal r(t) which is a binary data stream input through a channel or reproduced from data recorded on a storing device includes: an analog-to-digital converter (ADC) for sampling the input value according to sampling timing phases, and converting the sampled data into a digital signal r ; a modeling portion including 2N+1 taps P (n=−N, . . . , 0, . . . , N) each for selecting one of 2 tap values according to each pattern p (b , b ) of absolute values of the data transitions future &ngr; bits and past &tgr; bits, for estimating the channel characteristics of the sampled signal from the selected tap value and the data transition value; a timing recovery portion for controlling the sampling timing phase of the analog-to-digital converter using a phase gradient equal to p ( )−p ( ), which is the difference between values of respective taps positioned symmetrically around the tap P of the modeling portion; an equalizer for compensating for the deteriorated characteristics of the output value of the analog-to-digital converter; and a detector for converting the output of the equalizer to a digital value, to detect the original signal. Therefore, an accurate timing phase can be found using a model in which a non-linear channel of a high-density digital magnetic storing device is expressed by transition pulses selected according to the future &ngr; bits and the past &tgr; bits, thereby reducing timing jitter and bias.