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US 7,733,990 B2Granted
Receiver with improved sample granularity
AssigneeSTMicroelectronics Belgium NV
InventorPietro Capretta
Life of this patent
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Abstract
A receive path in a receiver including circuitry for deriving a first stream of first digitized samples from a received analog signal at a first sampling rate, and at least one interpolating filter in parallel with the first stream of first digitized samples for generating at least a second stream of digitized samples at the first sampling rate but offset with respect to the first stream by a fraction of a sample time period.
Claims20
A receive path in a receiver, comprising:
- means for deriving a first stream of first digitized samples from a received analog signal at a first sampling rate,
- at least one interpolating filter in parallel with the first stream of first digitized samples for generating at least a second stream of digitized samples at the first sampling rate but offset with respect to the first stream by a fraction of a sample time period,
- wherein the means for deriving the first stream of first digitized samples from the received analog signal at the first sampling rate comprises:
- means for generating a third stream of digitized samples from the received analog signal at a second sampling rate;
- and
- a further interpolating filter receiving the third stream from the means for generating the third stream, to generate the first stream of first digitized samples which are estimates of samples obtainable by sampling the received analog signal at the first sample rate lower than the second sampling rate, the first digitized samples being output at the first sampling rate and including at least one unusable sample.
3 more elements
A method of operating a receiver, comprising:
- deriving a first stream of first digitized samples from a received analog signal at a first sampling rate,
- interpolating in parallel with the first stream of first digitized samples to thereby generate at least one second stream of digitized samples at the first sampling rate but offset with respect to the first stream by a fraction of a sample time period,
- wherein deriving the first stream of first digitized samples from the received analog signal at the first sampling rate comprises:
- generating a third stream of digitized samples from the received analog signal at a second sampling rate;
- and
- interpolating the third stream of digitized samples, to generate the first stream of first digitized samples which are estimates of samples obtainable by sampling the received analog signal at the first sampling rate lower than the second sampling rate, the first digitized samples being output at the first sampling rate and including at least one unusable sample.
3 more elements
A receive path in a receiver, comprising:
- an analog to digital converter for deriving a first stream of first digitized samples from a received analog signal at a first sampling rate;
- a first interpolating filter receiving the first stream of first digitized samples from the analog to digital converter, to generate a second stream of second digitized samples which are estimates of samples obtainable by sampling the received analog signal at a second sampling rate lower than the first sampling rate, the second digitized samples being output at the second sampling rate and including at least one unusable sample;
- and
- at least one second interpolating filter in parallel with the second stream of second digitized samples for generating at least one third stream of digitized samples at the second sampling rate but offset with respect to the second stream by a fraction of a sample time period.
1 more element
Dependencies are inferred from the claim text.