System and method for detecting collisions in a shared...

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Reexamination Certificate

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C269S228000, C269S027000

Reexamination Certificate

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07104534

ABSTRACT:
A system for detecting collisions in a shared communications medium, such as a TDMA medium, includes a receive path adapted to generate a first intermediate signal, a second intermediate signal, and a data symbol sequence from an input signal. A preamble detection module generates a correlation metric from the first intermediate signal. A power measurement module generates a power indication signal from the second intermediate signal. A noise measurement module generates a noise indication signal from the second intermediate signal and the data symbol sequence. A processing module is adapted to characterize the input signal as a collision for certain values of correlation metric, power indication signal, and noise indication signal.

REFERENCES:
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patent: 5719869 (1998-02-01), Ryoo et al.
patent: 5940400 (1999-08-01), Eastmond et al.
patent: 6178161 (2001-01-01), Terry
patent: 2001/0055311 (2001-12-01), Trachewsky et al.
patent: 1 069 554 (2001-01-01), None
Copy of European Search Report from European Patent Application No. 02254011.6, 3 pages, dated Sep. 19, 2003.

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