import numpy as np import matplotlib.pyplot as plt w.. Common values for all modulation techniques samp_rate =50 s 50samples/s bitrate =1=1bits/s1symbol=1bit carr_freq =2=Hz dfreq=1Hz PSK - Phase Shift Keying In this digital modulation technique phase shift marks a bit transition. In this lab we are going to implement binary phase shift keying where a phase shift of 180 in the carrier marks bit transition. In reality, because of wireless channel, the effect of environment on it and irregularities in clocks at Tx and Rx, the constellation can rotate i.e., experience phase shifts as shown in the following figure. The BPSK signal is represented as: s1(t)=Asin(2fct)Forbit1s0(t)=Asin(2fct+)Forbit0 [2] Step 1 - Generate a baseband signal