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US 7,339,503 B1Granted
Adaptive asynchronous sample rate conversion
AssigneeSilicon Laboratories Inc.
InventorJavier Elenes
Life of this patent
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Abstract
A system including a buffer, a feedback loop configured to generate a fractional delay from a ratio of a first number of samples written into the buffer to a second number of samples read from the buffer, and a variable fractional delay filter configured to generate an output sample using a plurality of input samples and the fractional delay is provided.
Claims23
A system comprising:
- a buffer;
- a feedback loop configured to generate a fractional delay from a ratio of a first number of samples written into the buffer to a second number of samples read from the buffer;
- and
- a variable fractional delay filter configured to generate an output sample using a plurality of input samples and the fractional delay.
1 more element
A method performed by an integrated communication device, the method comprising:
- generating a fractional delay from a ratio of a first number of samples written into a buffer synchronously with a first clock signal to a second number of samples read from a buffer synchronously with a second clock signal;
- and
- generating an output sample using a plurality of input samples and the fractional delay.
A communications device comprising
- radio frequency (RF) circuitry configured to interface with an antenna;
- signal processing circuitry coupled to the RF circuitry and including resampler;
- and
- a buffer;
- wherein the resampler includes a feedback loop configured to generate a fractional delay from a ratio of a first number of samples written into the buffer to a second number of samples read from the buffer and a variable fractional delay filter configured to generate an output sample using a plurality of input samples and the fractional delay.
2 more elements
A communications system comprising:
- a communications device including:
- communications circuitry;
- signal processing circuitry coupled to the communication circuitry and including resampler;
- and
- a buffer;
- an antenna coupled to the communications device;
- and
- processing circuitry configured to communicate with the communications device;
- wherein the resampler includes a feedback loop configured to generate a fractional delay from a ratio of a first number of samples written into the buffer to a second number of samples read from the buffer and a variable fractional delay filter configured to generate an output sample using a plurality of input samples and the fractional delay.
6 more elements
Dependencies are inferred from the claim text.