The discussion centers on the importance of rebuilding an IQ signal at the receiver level, particularly when the emitted signal was not originally created using IQ modulation. The primary advantage of IQ demodulation lies in its ability to capture both amplitude and phase information, which is crucial for applications in microwave engineering. By utilizing an I/Q local oscillator and two mixers, the process allows for image rejection and the conversion of a single RF signal into two intermediate frequency signals (Iif and Qif), effectively doubling the bandwidth of the best available A/D converters.
PREREQUISITESThis discussion is beneficial for RF engineers, signal processing specialists, and anyone involved in the design and analysis of communication systems utilizing QAM and IQ modulation techniques.
How do you generate a QAM signal without using modulated I and Q generation stages?Ravaner said:has not been created using IQ modulation
Ravaner said:Hello.
My question is about a specific case. Assume emitted signal ihas not been created using IQ modulation, what is the interest to rebuild an IQ signal in receiver before port-processing ?
If we demodulate the signal using a local carrier, IQ demodulation enables frequencies one side of the local carrier to be rejected, providing image rejection or single sideband reception.Ravaner said:Thanks for your replies