Asynchronous low sampling rate read channel using combination mi

Details Asynchronous low sampling rate read channel using combination mi Asynchronous low sampling rate read channel using combination mi

1998-03-13

2000-07-04

Pham, Chi H.

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375232, 360 65, H03D 100, H03H 730, G11B 5035

Patent

active

06084924&

ABSTRACT:
A method and apparatus for the recovery of information via asynchronous signal sampling of coded analog waveforms by double interpolating values into the train of asynchronously sampled signals prior to the train being applied to a synchronous detector. The double interpolation includes averaging successive sample signals and midpoint interpolating them between the sample, and then interpolating signals between the sample signals and midpoint signals closest to predicted synchronous points. This double interpolation facilitates low sampling rates while still effectuating accurate synchronous digital detection.

REFERENCES:
patent: 4031370 (1977-06-01), Catherall
patent: 5638070 (1997-06-01), Kuwaoka
patent: 5949695 (1999-09-01), Snell
Melas et al., "An Asynchronous Fully Digital Channel for Magnetic Recording", IEEE Globecom Conference Record, 1994, pp. 1144-1147.
Oppenheim et al., "Discrete Time Signal Processing", Prentice Hall, Inc., copyright 1989, p. 258.

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