US 5,311,182 A · Method and apparatus for regenerating a distorted binary signal stream

Abstract

Apparatus is shown for regenerating a signal stream of binary digits which has been distorted by intersymbol interference during passage through a channel (10 and 12) having insufficient channel bandwidth such that the channel output waveform comprises substantially an analog signal. (FIG. 2 at B and D.) After equalization (24) the channel output is converted to a digital sample signal stream at analog-to-digital converter (26). The converter (26) output is supplied to shift register (28) from which successive groups of digital sample signals produced over a plurality of bit intervals of channel output are shifted to decoder (22). Initialization bits that immediately precede the first group of binary digits to be regenerated also are supplied to decoder (22) through sector header reader (20) for use in decoding the first group of digital sample signals supplied to the decoder. During decoding of subsequent groups of digital sample signals, end bits (3,4 and 5) from the preceding group of regenerated binary digits are supplied to the decoder (22). The decoder includes a plurality of trained networks (40-1 through 40-5 and 50-1 through 50-m) of either the neural network or binary tree type.

Claims17

Dependent claims

Apparatus for regenerating an input signal stream of binary digits which has been distorted by intersymbol interference during passage through a channel having a channel output comprising a stream of distorted binary digits, said apparatus comprising:

analog-to-digital converter means having a sample rate greater than the bit rate of the stream of distorted binary digits from the channel output for digitizing the stream of distorted binary digits from the channel output and producing an output comprising a stream of digitized binary digits,
decoder means comprising a plurality of train non-arithmetic pattern-recognizing binary tree networks that implement binary logic for decoding successive groups of digitized binary digits from the analog-to-digital converter means and producing a decoder output of successive groups of binary digits corresponding to successive groups of binary digits in said input signal stream, said groups of binary digits produced by said decoder means including a first group and subsequent groups, each of which subsequent groups is preceded by an immediately preceding group from said decoder means,
means for supplying successive groups of digitized binary digits from said analog-to-digital converter means to the trained binary tree networks for decoding, and
means for supplying a plurality of end bits from an immediately preceding group of binary digits produced by said decoder means to said decoder means for use by said decoder means in decoding said groups of digitized binary digits supplied to said trained binary tree networks.

1 more element

A magnetic storage system comprising:

a magnetic storage disk having a plurality of concentric tracks, each of said tracks including a plurality of sectors, each sector including a general data field for storing general data in binary digital form and a plurality of decoder initialization bits immediately preceding the general data field,
means for reading/writing general data from said general data fields,
means for reading decoder initialization bits from said magnetic storage disk,
analog-to-digital converter means having a sample rate greater than the bit rate of general data bits read from said magnetic storage disk for digitizing general data bits read from said magnetic storage disk,
non-arithmetic pattern-recognizing binary logic decoder means,
means for supplying successive digitized groups of general data bits from said analog-to-digital converter means to said decoder means, said successive digitized groups including a first digitized group and subsequent digitized groups, each of said subsequent digitized groups being preceded by an immediately preceding digitized group, said decoder means being responsive to said first digitized group of general data bits and to decoder initialization bits for producing a first group of binary digits corresponding to a first group of general data bits that immediately follow the decoder initialization bits,
after production of said first group of binary digits by said decoder means, said decoder means being responsive to said subsequent digitized groups of general data bits and to a plurality of end bits from an immediately preceding group of binary digits produced by said decoder means for producing groups of binary digits corresponding to groups of general data bits that follow said first group of general data bits.

4 more elements

Dependencies are inferred from the claim text.

Method and apparatus for regenerating a distorted binary signal stream

Life of this patent

Method and apparatus for regenerating a distorted binary signal stream

Life of this patent

Abstract

Claims17