Phase tracking system
AssigneeThomson Licensing
InventorIvonete Markman
Life of this patent
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Abstract
A phase tracking system includes a source of an input signal representing a received symbol. A phase rotator has a first input terminal which is responsive to the input signal, a second input terminal which is responsive to a phase correction signal, and an output terminal which produces a phase adjusted output signal. A decision element generates an ideal signal representing the received symbol in response to the phase adjusted output signal. A phase adjuster, which has full phase wrap-around capability, generates the phase correction signal in response to the phase difference between the phase adjusted output signal and the ideal signal.
Claims24
A phase tracking system, comprising:
- a source of an input signal representing a received symbol;
- a phase rotator, having a first input terminal responsive to the input signal, a second input terminal responsive to a phase correction signal, and an output terminal producing a phase adjusted output signal;
- a decision element, responsive to the phase adjusted output signal, for generating an ideal signal representing the received symbol;
- and
- a phase adjuster, for generating the phase correction signal responsive to the phase difference between the ideal signal and the phase adjusted output signal, wherein the phase adjuster has full phase wrap-around capability and comprises a phase limiter for limiting the phase correction signal to within a specified range.
A method comprising:
- receiving an input signal representing a received symbol;
- rotating the input signal based on a phase correction signal to produce a phase adjusted output signal;
- generating, based on the phase adjusted output signal, an ideal signal representing the received symbol;
- and
- generating a phase correction signal based on a phase difference between the ideal signal and the phase adjusted output signal, wherein a phase adjuster is used to generate the phase correction signal and the phase adjuster has full phase wrap-around capability, and wherein generating the phase correction signal comprises limiting the phase correction signal to within a specified range.
Dependencies are inferred from the claim text.