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How to choose the bandwidth of a 2 pole Butterworth filter for QPSK modulation? What bandwidth should be chosen, if symbol duration is 10 ms? How to limit ISI for QPSK modulation?

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  • \$\begingroup\$ Get hold of one of the several free simulator tools and design it yourself is my advice. I use micro-cap. You can get a free student version. \$\endgroup\$ – Andy aka Jun 15 at 14:52
  • \$\begingroup\$ advice: don’t use Butterworth for minimum ISI. Use Raised Cosine filter. search for next question \$\endgroup\$ – Sunnyskyguy EE75 Jun 15 at 15:44
  • \$\begingroup\$ How much Eye-Closing can you accept? \$\endgroup\$ – analogsystemsrf Jun 15 at 17:07

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