Real-time digital quadrature demodulation method and device for ultrasonic imaging system
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United States of America Patent
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Apr 27, 2010
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May 29, 2008
app pub date -
Dec 29, 2006
filing date -
Nov 27, 2006
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Abstract
A real-time digital quadrature demodulation method and device for the ultrasonic imaging system are disclosed in this invention. In addition to a multiplying step and a filtering step, the method further comprises a sine and cosine table generating step for generating the sine and cosine table in real time, and a filter parameter generating step for generating corresponding filter parameters in real time to filter signals from the multipliers. The device comprises two multipliers, two filters, a sine and cosine table generating module, a filter parameter generating module, and two parameter memories. The real-time digital quadrature demodulation method and device for the ultrasonic imaging system according to the invention are capable of effectively saving the storage resource, and are easily controllable.
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