Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2005-05-31
2005-05-31
Corrielus, Jean B. (Department: 2637)
Pulse or digital communications
Receivers
Interference or noise reduction
C327S307000, C375S285000, C455S284000, C455S296000
Reexamination Certificate
active
06901121
ABSTRACT:
A novel and useful apparatus for and method of DC offset compensation for use in a communications receiver. The invention is operative to calculate an estimate of the DC offset which is subsequently subtracted from each input sample to generate compensated samples. The training sequence portion of the uncompensated input samples is used to generate an estimate of the DC offset. The vector used in calculating the offset estimate is pre-calculated for several channel lengths and stored in memory. An estimate of the channel is generated which provides the channel length and the location in the input sample buffer of the first training sequence sample to be used in calculating the offset estimate. The channel length is used to determine the number of training sequence samples to be used and to select one of the previously calculated vectors.
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Dubrovin Andrew
Reshef Ehud
Yakhnich Evgeny
Comsys Communication & Signal Processing Ltd.
Corrielus Jean B.
Zaretsky Howard
Zaretsky & Associates PC
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