Joint ad-hoc signal and collision detection method
AssigneeNXP B.V.
InventorsUlrich Andreas Muehlmann, Ulrich NEFFE
Life of this patent
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Abstract
Various embodiments relate to a method for classifying received radio frequency signals, including: receiving an input signal; matched filtering the input signal to produce a correlation result signal; sampling the correlation result signal at a plurality of half-bit-grids and a plurality of bit-grids to produce a set of modulated phase correlation result samples and a set of non-modulated phase correlation result samples; calculating a minimum of the set of modulated phase correlation result samples; calculating a maximum of the set of non-modulated phase correlation result samples; and classifying the input signal as valid data or collision data based on the minimum and the maximum.
Claims16
A method for classifying received radio frequency signals, comprising:
- receiving an input signal;
- matched filtering the input signal to produce a correlation result signal;
- sampling the correlation result signal at a half-bit-grid and a bit-grid of a plurality of bits to produce a set of modulated phase correlation result samples and a set of non-modulated phase correlation result samples;
- calculating a minimum of the set of modulated phase correlation result samples;
- calculating a maximum of the set of non-modulated phase correlation result samples;
- and
- classifying the input signal as valid data or collision data based on the calculated minimum and the calculated maximum.
A collision detection system for classifying received radio frequency signals, comprising:
- a receiver configured to receive an input signal;
- a matched filter configured to matched filter the input signal to produce a correlation result signal;
- a collision detector configured to:
- sample the correlation result signal at a half-bit-grid and a bit-grid of a plurality of bits to produce a set of modulated phase correlation result samples and a set of non-modulated phase correlation result samples;
- calculate a minimum of the set of modulated phase correlation result samples;
- calculate a maximum of the set of non-modulated phase correlation result samples;
- and
- classify the input signal as valid data or collision data based on the calculated minimum and the calculated maximum.
Dependencies are inferred from the claim text.