Symbol decoder, threshold estimation and correlation systems and methods
AssigneeInfineon Technologies AG
InventorDavid Levy
Life of this patent
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Abstract
A threshold estimate system includes a level quantizer, a correlation mechanism, and a threshold adaptation component. The level quantizer is configured to receive an input signal and to generate a quantization signal from the input signal according to one or more threshold levels. The correlation mechanism is configured to correlate the quantization signal with reference symbols to generate an output signal. The threshold adaptation component is configured to modify the one or more threshold levels according to the output signal and the input signal.
Claims21
A threshold estimation system comprising:
- a level quantizer configured to receive an input signal and generate a quantization signal according to one or more threshold levels;
- a correlation mechanism configured to recognize symbols from the quantization signal and generate a data stream based thereon, to compare the recognized symbols with reference symbols and generate a correlation score based thereon, and to generate an output signal having the data stream and the correlation score;
- and
- a threshold adaptation component configured to modify the one or more threshold levels according to the output signal and the input signal.
A method for updated threshold levels used for quantization, the method comprising:
- detecting and recognizing a symbol by a correlation mechanism;
- obtaining a plurality of current samples for the recognized symbol;
- obtaining current threshold values for the recognized symbol;
- generating an average measured current for the recognized symbol according to the obtained plurality of current samples;
- generating an expected average current for the recognized symbol according to the current threshold values;
- and
- obtaining an error estimate for the recognized symbol according to the average measured current and the expected average current.
A method of recognizing symbols in a quantization signal, the method comprising:
- obtaining a set of samples beginning with a last sample;
- identifying transition samples from the obtained set of samples that are adjacent to boundary crossings;
- generating a correlation score for the set of samples, wherein the identified transition samples are set to a score of zero;
- and
- comparing the correlation score with at least one previous correlation score to identify a peak correlation score.
Dependencies are inferred from the claim text.