How do i implement dpsk on GNU radio

 

A ten second Google Search for "GNU Radio DPSK" turned up:

https://courses.washington.edu/ee420/projects/lab2_gnuradio.pdf

 

how many times does the BPSK and DPSK signal change its phase to this sequence 0,0,1,0,0,1,1,1?

 

Sounds like a homework problem. Perhaps try reading up on how BPSK and DPSK work.