How is quadrature mixing done?

1. What is quadrature mixing?
2. How does quadrature sampling work?
3. Which two phases would be considered quadrature?
4. What does a quadrature do?

What is quadrature mixing?

Quadrature mixing (direct conversion) allows for the complex modulation or demodulation of signals as represented by two orthogonal signals, I and Q. Quadrature mixing has the added benefit of an increased complex bandwidth that allows for bandwidths up to the sample rate of the DAC.

How does quadrature sampling work?

Quadrature-sampling is the process of digitizing a continuous (analog) bandpass signal and translating its spectrum to be centered at zero Hz. Let's see how this popular process works by thinking of a continuous bandpass signal, of bandwidth B, centered about a carrier frequency of f_c Hz.

Which two phases would be considered quadrature?

In astronomy, the arrangement of the earth, sun, and another planet or the moon in which the angle subtended at the earth between the sun and the third body, in the plane of the ecliptic, is 90°. The first and third quarters of the moon are positions of quadrature.

What does a quadrature do?

quadrature, in mathematics, the process of determining the area of a plane geometric figure by dividing it into a collection of shapes of known area (usually rectangles) and then finding the limit (as the divisions become ever finer) of the sum of these areas.