US Patent:
20140269985, Sep 18, 2014
Inventors:
- Hamilton, BM
Manish J. Manglani - Greensboro NC, US
Yosef Stein - Sharon MA, US
Assignee:
Analog Devices Technology - Hamilton
International Classification:
H04B 1/04
Abstract:
Apparatus and methods for estimating a direct current offset in an upconverter are disclosed. Samples of a first signal are received. Values of a compensation signal are retrieved. For example, the compensation signal can be a component in a modified baseband signal, wherein the modified baseband signal is upconverted, downconverted, and filtered to generate the first signal. An estimate of a first DC offset induced by an upconverter is generated based at least partly on at least two selected samples of the first signal and corresponding values of the compensation signal.