Apparatus and method for symbol timing recovery
AssigneeThomson Licensing
InventorGabriel Alfred Edde
Life of this patent
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Abstract
A symbol timing recovery detector receives a sample stream, representing an input signal having successive symbol times sampled at successive sample times. The sample stream includes samples representing successive symbols alternating with samples representing transitions between surrounding symbol representative samples. The detector includes a first circuit which determines a transition value from a transition representative sample and surrounding symbol representative samples. A second circuit determines the slope between the surrounding symbol representative samples. A third circuit generates a signal representing the phase error between the sample times and the symbol times of the input signal from the slope and the transition value.
Claims15
A symbol timing recovery detector, comprising:
- an input for receiving a sample stream, representing an input signal having successive symbol times sampled at successive sample times, comprising samples representing successive symbols alternating with samples representing transitions between surrounding symbol representative samples;
- a circuit, responsive to a transition representative sample and surrounding symbol representative samples, for determining a transition value;
- a circuit for determining the slope between the surrounding symbol representative samples;
- and
- a circuit, responsive to the slope and the transition value, for generating a signal representing the phase error between the sample times and the symbol times of the input signal.
A method for recovering symbol timing for a sample stream, representing an input signal having successive symbol times sampled at successive sample times, comprising samples representing successive symbols alternating with samples representing transitions between surrounding symbol representative samples, comprising the steps of:
- determining a transition value from a transition representative sample and surrounding symbol representative samples;
- determining the slope between the surrounding symbol representative samples;
- and
- generating a signal representing the phase error between the sample times and the symbol times from the slope and the transition value.
Dependencies are inferred from the claim text.