Howtosignalprocessing
This decomposition has a useful property: the data rate of the IQ stream reflects the data being transmitted or received, e.g. at millions of bits per second (MBPS) and is independent of the carrier frequency, which could be at Gigahertz (GHz).
- Is IQ data in frequency domain?
- What is IQ sampling?
- What does IQ stand for in RF?
- How are IQ signals generated?
Is IQ data in frequency domain?
The IQ data can be in the time domain (time vs amplitude+phase) or, usually post processing with a transform be, in the frequency domain (frequency vs amplitude+phase).
What is IQ sampling?
IQ sampling is the form of sampling that an SDR performs, as well as many digital receivers (and transmitters). It's a slightly more complex version of regular digital sampling (pun intended), so we will take it slow and with some practice the concept is sure to click!
What does IQ stand for 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 are IQ signals generated?
I/Q signaling refers to the use of two sinusoids that have the same frequency and a relative phase shift of 90°. Amplitude, phase, and frequency modulation can be performed by summing amplitude-modulated I/Q signals. Quadrature modulation refers to modulation that involves I/Q signals.
