Patent ID: 8638883
Filing Date: 2014-01-28
Classification: H04B,H04L

Abstract:
1. A method, comprising: receiving a signal using a direct conversion receiver, while the receiver is set at a gain that is selected from a range of possible gain values; providing multiple DC offset correction values for use by a DC offset cancellation loop, each DC offset correction value being associated with a respective sub-range of the range of the possible gain values; selecting a DC offset correction value from among the multiple DC offset correction values based on the gain to which the receiver is set; canceling a DC offset in the signal by setting the DC offset cancellation loop to the selected DC offset correction value; and upon detecting that the gain of the receiver has changed from a first sub-range to a second sub-range of the range of the possible gain values, evaluating a condition with regard to past operation in the second sub-range, and, when the condition is met, initiating cancellation of the DC offset in the second sub-range with an initial loop bandwidth that is larger than a nominal loop bandwidth of the DC offset cancellation loop.