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In the Random Integer Generator : Set Set Size to 4.

Add QPSK Modulator Baseband and BPSK Demodulator Baseband blocks.

With four phases, QPSK can encode two bits per symbol to minimize the bit error rate (BER) - sometimes misperceived as twice the BER of BPSK. QPSK uses four points on the constellation diagram, equispaced around a circle. Quadrature phase-shift keying (QPSK) is one of PSK forms. The theoretical-exact0 curve is the Theoretical (Exact), and simulation0 curve is for the simulation of the model:

In BPSK Modulator Baseband and BPSK Demodulator Baseband : Set the Phase offset to 0.īefore Noise figure is the plot of symbols at transmitter, and After Noise figure is the plot of symbols at receiver:.

In the Random Integer Generator : Set Set Size to 2.

Add BPSK Modulator Baseband and BPSK Demodulator Baseband blocks.

It uses two phases which are separated by 180° and so can also be termed 2-PSK.

Set BER variable name to the name of To Workspace block in your model (default: simout, mine: ber).īPSK is the simplest (Binary) form of phase shift keying (PSK).

Choose the model you are using and previously saved in Simulation MATLAB File or Simulink model tab.

In Monte Carlo tab : Set the Eb/No range to -10:1:10.In Theoritical tab : choose the specific Modulation Type you are using with Modulation Order you are using, then click Plot.Type bertool in the command window then click Enter.In the AWGN Channel : Set Eb/No (dB) to Eb/No to be able to produce BER figure.Click on Run Button to produce the scatter plots.Save the model (by clicking on the Save button or by using the shortcut Ctrl+S) with any name and location you choose.In To Workspace : Set Limit data points to last to 2, set Save format to Array, and Save 2-D signals as 2-D array.In Error rate calculation : Set Output data to Port, tap Stop Simulation, and set Maximum number of symbols to 1e4.In the AWGN Channel: Set Eb/No (dB) to 10.In the Random Integer Generator : Set Source of initial seed to Parameter and Set Initial seed to 37.Set the Simulation stop time (in a text box in the above buttons) to 100.Connect the blocks in the way shown in Blocks folder.To Workspace block for generating the BER-vs-SNR figures.Two constellation diagrams for plotting the symbols at the transmitter and receiver.Modulator & Demodulator for chosen scheme.

Add the necessary blocks by typing the name of it on the blank window.Open Simulink by typing simulink in the command window or by clicking on Simulink Button in Home Tab.