reconstruct real valued data from IQ data

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nur dsc 2021-12-21

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https://ww2.mathworks.cn/matlabcentral/answers/1615160-reconstruct-real-valued-data-from-iq-data

回答： Akash 2024-2-21

I have an audio file. After reading it, I applied a single sideband modulation, ssbmod().

I tried to simulate a multipath fading channel.Then the signal passed through the fading channel. After that I added gaussian noise to the output signal of the channel .

But the output signal of the channel is complex. For demodulation ssbdemod(), I need real valued data not complex value.

So how do you get real valued signals from IQ data ?

I was planning to demodulate the output of the channel and sound it.

Thanks !

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Answer 1

Akash 2024-2-21

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Hi Nur,

You can transform the complex values of your output signal into real values. If you want to obtain the real part of a complex signal, you can use the MATLAB "real" function. You can find more information about this function in the MATLAB documentation provided in the link below:-

https://www.mathworks.com/help/matlab/ref/real.html

Additionally, if you are looking to extract the magnitude of the complex numbers, you can use the "abs" function. The documentation for "abs" can be found in the below provided link:-

https://www.mathworks.com/help/matlab/ref/abs.html