# BPSK Signal in GNURadio

**URL:** <https://www.ruby-forum.com/t/bpsk-signal-in-gnuradio/244669>\
**Category:** GNU Radio\
**Created:** [May 24, 2016, 4:34am UTC](https://www.ruby-forum.com/t/bpsk-signal-in-gnuradio/244669 "2016-05-24T04:34:02Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Sadaf\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/858c86/32.png) [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\
**Post date:** [May 24, 2016, 4:34am UTC](https://www.ruby-forum.com/t/bpsk-signal-in-gnuradio/244669/1 "2016-05-24T04:34:02Z")

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Hello,

I try to make a BPSK Signal from GNURadio and face some problem.

1. Look at the DPSK\_Output picture that I’ve attached, why there are  
harmonic frequency in the DPSK block output signal that make the DPSK  
block output signal not really square? And Any idea to make the signal  
become square? I’ve try to use filter block, but it didn’t work

2. At the BPSK Signal pict. Why the BPSK signal that I made is not as  
same as the theory about BPSK Signal which the phase changed if the bit  
change?

3. What should I do to make the BPSK Signal Output looks better? at  
least the signal looks like sinus wave

Thank you so much

Sincerely,

Fauzan