Getting Started

Binary Phase Shift Keying

The BPSK Modulator and Demodulator Baseband blocks implement binary phase shift keying (BPSK) modulation. BPSK is a method for modulating a binary signal onto a complex waveform by shifting the phase of the complex signal. In digital baseband BPSK, the symbols 0 and 1 are modulated to the complex numbers exp(jt) and -exp(jt), respectively, where t is a fixed angle. In this example, t = 0, so these numbers are just 1 and -1.

You can set the value of t in the Phase offset parameter in the masks for the BPSK Modulator Baseband block and the BPSK Demodulator Baseband block. The default value is 0.

To learn more about the digital modulation features of the Communications Blockset, see Digital Modulation in the online Communications Blockset documentation.

Modeling a Channel with Modulation

Setting Parameters in the BPSK Model