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DSSS Plotting

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Tiisetso Ntlatleng
Tiisetso Ntlatleng on 1 Mar 2011
Answered: Pritesh on 13 Mar 2024
I have a QPSK signal (amplitude samples) that I've spread using DSSS. The PSD of the DSSS spread signal should be spread in frequency and the power should go down. When I plot the frequency response of the DSSS signal, it looks spread but has not attenuated. I use the function {plot (20*log(fft(DSSS_time_domain_signal)))} to plot the DSSS frequency version of the signal. Is there something Im not considering when plotting?

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Answers (2)

Vieniava
Vieniava on 4 Mar 2011
Try this:
plot(20*log(abs(fft(DSSS_time_domain_signal))))
Pritesh
Pritesh on 13 Mar 2024
plot(20*log(abs(fft(DSSS_time_domain_signal))))

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