Connected to the sequence generator module and the

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connected to the sequence generator module and the output PWM and the carrier was connected to the multiplier. The PWM when turned ON, has a +1v and is multiplied to the carrier having a 0 o angle otherwise when it is turned OFF, it has a -1v multiplied to the carrier that will give a 180 o causing the carrier to phase shift which could be seen in Figure 2. For the demodulation, the stolen carrier (100 kHz) is linked to the phase shifter and the BPSK signal is connected to the multiplier. As shown in Figure 4, during the OFF time, the signal caused a 360 o phase shift at the multiplexing stage which was filtered by the Low - pass filter, this waveform can be perceived at Figure 5.
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Canaya, Regina Marie V. CONCLUSION Phase-shift keying is a digital modulation process which conveys data by changing the phase of a constant frequency reference signal. The modulation is accomplished by varying the sine and cosine inputs at a precise time. For this experiment, it is about the Binary Phase Shift Keying (BPSK). BPSK is a digital modulation scheme that conveys data by changing, or modulating, two different phases of a reference signal (the carrier wave). The constellation points chosen are usually positioned with uniform angular spacing around a circle. The amplitude of the binary input signal (+1v and -1v) was multiplied to the carrier signal for the phase to shift as explained at my interpretation and seen at Figure 2 and during the demodulation during the OFF time, the signal caused a 360 o phase shift while during the ON time it does not phase shift at the multiplexing stage which was filtered by the Low - pass filter, this waveform can be perceived at Figure 5.
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