How to do QAM modulation and plot the constellation diagram for a complex signal (I+jQ)?

1. What is constellation diagram of QAM?
2. How do you generate QAM modulation?
3. How to perform QAM modulation in Matlab?
4. How to plot constellation diagram in matlab?

What is constellation diagram of QAM?

Quadrature Amplitude Modulation, QAM is a form of modulation that is a combination of phase modulation and amplitude modulation. The QAM scheme represents bits as points in a quadrant grid know as a constellation map. Constellation Map.

How do you generate QAM modulation?

Modulate Data Using QAM

Modulate the data using the qammod function. y = qammod(x,M); Display the modulated signal constellation using the scatterplot function. Set the modulation order to 256, and display the scatter plot of the modulated signal.

How to perform QAM modulation in Matlab?

y = qammod( x , M ) modulates input signal x by using QAM with the specified modulation order M . Output y is the modulated signal. y = qammod( x , M , symOrder ) specifies the symbol order.

How to plot constellation diagram in matlab?

Create 32-QAM Constellation Diagram

Use the qammod function to generate the 32-QAM symbols with binary symbol ordering. M = 32; data = 0:M-1; sym = qammod(data,M,'bin'); Plot the constellation. Label the order of the constellation symbols.