Arrangement for dynamic DC offset compensation
First Claim
Patent Images
1. A DC tracking arrangement comprising:
- means for a first DC tracking unit, for slow DC tracking receiving an input signal and generating a first output signal;
means for a second DC tracking unit, for fast DC tracking receiving the input signal and generating a second output signal; and
means for a decision unit receiving the first and second output signal for selecting the first or second output signal.
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Abstract
A DC tracking arrangement includes a first tracking unit for slow tracking receiving an input signal and generating a first output signal, a second tracking unit for fast tracking receiving the input signal and generating a second output signal, and a decision unit receiving the first and second output signal for selecting the first or second output signal.
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Citations
24 Claims
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1. A DC tracking arrangement comprising:
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means for a first DC tracking unit, for slow DC tracking receiving an input signal and generating a first output signal; means for a second DC tracking unit, for fast DC tracking receiving the input signal and generating a second output signal; and means for a decision unit receiving the first and second output signal for selecting the first or second output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A Viterbi equalizer comprising a plurality of states, wherein each state comprises a DC tracking arrangement comprising:
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means for a first DC tracking unit for slow DC tracking receiving an input signal and generating a fast output signal; means for a second DC tracking unit for fast DC tracking receiving the input signal and generating a second output signal; and means for a decision unit receiving the first and second output signal for selecting the first or second output signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. Computer readable medium encoded with computer executable instructions for determining and tracking a DC offset in a digital signal stream used for symbol detection, said instructions when executed:
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providing a digital signal stream to an equalizer for symbol determination;
determining an error value for each symbol;narrow band filtering the error value for slow tracking of the DC offset;
wide band filtering the error value for fast tracking of the DC offset;comparing the output values of the narrow and wide band filtering and selecting the narrow or wide band output values as a DC offset value. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification