Method of recovering and decoding of Manchester coded data

Details Method of recovering and decoding of Manchester coded data Method of recovering and decoding of Manchester coded data

2005-11-08

2005-11-08

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from nrz codes

C342S042000

Reexamination Certificate

active

06963295

ABSTRACT:
A method and apparatus for accurately decoding a Manchester data stream having transition time distortion and noise spikes. Briefly, in an embodiment using a protocol where a falling edge at the mid-point of a bit represents a “1” bit and a rising edge at the mid-point represents a “0” bit, the coded data can be accurately determined by comparing the time period tp1from the start of the bit to the first falling edge and the time period tp2from the last rising edge to the end point of the bit. If tp1is less than tp2, the bit represents a bit value of “0” and if tp2is less than tp1, the bit represents a bit value of “1”.

REFERENCES:
patent: 5053774 (1991-10-01), Schuermann et al.
patent: 5347280 (1994-09-01), Schuermann
Presentation entitled Keeping Pace With RFID presented by Lowry Computer Products, date unknown.
Manual entitled TI-RFID Product Manuals dated Nov. 2001.
Paper entitled The Cutting Edge of RFID Technology and Applications for Manufacturing and Distribution by Susy d'Hont of Texas Instruments TIRIS, date unknown.

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