Device for the digital combination of signals
AssigneeInstitut Francais du Petrole
InventorPatrick Coquerel
Life of this patent
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Abstract
Analog signals picked up by sensors are oversampled and converted locally for example into streams of 1-bit digital words and, without any previous formatting are transmitted on transmission channels to a central station. The central station includes a storage and a combining circuit for combining and weighting directly these 1-bit words, as well as a filter for reconstituting, from the combinations, high-resolution digital words. A preferred application is combining of acoustic or seismic signals.
Claims15
A process for producing digital words from a combination of independently sensed analog signals comprising:
- oversampling each of the analog signals to produce digital words of a lower resolution;
- directly combining the digital words of the lower resolution;
- and
- converting the combined digital words of the lower resolution by decimation into digital words of higher resolution.
A process for producing digital words from a combination of independently sensed analog signals comprising:
- oversampling each of the analog signals to produce digital words of a lower resolution from each of the analog signals;
- modifying by weighting at least part of the digital words of the lower resolution;
- combining of the modified digital words of the lower resolution;
- and
- converting the combined digital words of the lower resolution by decimation into the digital words of higher resolution.
A device for producing digital words from a combination of independently sensed analog signals comprising:
- converters, coupled to a source of the different analog signals, for converting by oversampling each of the analog signals into digital words of a lower resolution;
- a combining device, directly coupled to the converters, for combining the digital words of the lower resolution;
- and
- a filter, coupled to the combining device, for converting by decimation the combined digital words of the lower resolution into digital words of a higher resolution.
A device for producing digital words from a combination of independently sensed analog signals comprising:
- converters, coupled to a source of the different analog signals, for converting by oversampling each of the analog signals to produce digital words of a lower resolution;
- a weighting unit, coupled to the converters, for modifying by weighting at least part of the lower resolution digital words;
- a combining device, coupled to the converters, for combining the weighted digital words of the lower resolution obtained by oversampling the analog signals;
- and
- a filter, coupled to the combining device, for converting by decimation the combined sampled and weighted digital words of the lower resolution into digital words of higher resolution.
Dependencies are inferred from the claim text.