Howtosignalprocessing
What is IQ in RF?
Quadrature signals, also called IQ signals, IQ data or IQ samples, are often used in RF applications. They form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis.
How is IQ power calculated?
The amplitude of an IQ signal is just the vector magnitude, √I2+Q2. The power of an IQ signal is the squared magnitude, I2+Q2.
What is IQ modulation?
What's an IQ Modulator? An IQ modulator is a device that converts baseband information into RF signals. Internally, two double-balanced mixers are combined as shown below. By modulating with both in-phase (I) and quadrature (Q) inputs, any arbitrary output amplitude and phase can be selected.
What is IQ data in ultrasound?
The first ultrasound signal processing technique is quadrature detection, or IQ as it's sometimes called. This method mixes (essentially multiplies) an in-phase and quadrature-phase sinusoid with the input signal, causing signal content of that frequency to be accentuated and all other content to be reduced.
