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Simulink errors in Nonlinearity HPA block in the Merge and Output inside the block

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Hi,I am working with SSB/DSB transmitter simulation in Simulink. These errors occred in memoryless Nonlinearity HPA block in the Merge and Output inside the block.

17_1171294155.GIF


1)Complex signal mismatch. Output port 1 of 'Memoryless
Nonlinearity/Merge' is a signal of numeric type complex. However, it
is driving a signal of numeric type real.

2)Complex signal mismatch. Input port 1 of 'Memoryless
Nonlinearity/Out1' expects a signal of numeric type real. However, it
is driven by a signal of numeric type complex.

Anyone knows what's wrong and how to solve this problem? What HPA block should i choose for nonlinearities,IIP2 and IIP3 in simulink?Am/PM effects of amplifier is not included.

Really need urgent help...Thanks for any advice!!
 

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