Exciter and quadrature error correction method
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United States of America Patent
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Dec 29, 2015
Grant Date -
Apr 9, 2015
app pub date -
Dec 11, 2014
filing date -
Jun 13, 2012
priority date (Note) -
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Abstract
According to one embodiment, an exciter comprises a sine wave generator, a filter, a digital/analog converter, and a quadrature modulator. The sine wave generator generates a first sine wave and a second sine wave while changing a frequency in a predetermined step at a preset time interval. The filter sets one of stored filter coefficients and performs filter processing for the first sine wave and the second sine wave. The digital/analog converter converts the first sine wave and the second sine wave after the filter processing into a first analog signal and a second analog signal, respectively. The quadrature modulator quadrature-modulates the first analog signal and the second analog signal.
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