BPSK signal that has not been pulse shaped by any filter

1. Why is pulse shaping required?
2. How is BPSK signal generated?
3. What feature of the BPSK signal suggests that it's a Dsbsc signal?
4. What is BPSK spectrum?

Why is pulse shaping required?

Its purpose is to make the transmitted signal better suited to its purpose or the communication channel, typically by limiting the effective bandwidth of the transmission. By filtering the transmitted pulses this way, the intersymbol interference caused by the channel can be kept in control.

How is BPSK signal generated?

Convert unipolar to bipolar in the databits. Modulate the bipolar bits with Binary Phase Shift Keying (BPSK). Multiply the baseband BPSK with a carrier fc = 100 Hz. The modulated BPSK signals will be transmitted through a Noiseless channel.

What feature of the BPSK signal suggests that it's a Dsbsc signal?

You may find it difficult to see at first but look closely and you'll notice that alternating halves of the BPSK signal's envelopes have the same shape as the message. This indicates that BPSK is actually double-sideband suppressed carrier (DSBSC) modulation.

What is BPSK spectrum?

Convolution of any spectrum with a frequency impulse centers this spectrum about the frequency of the impulse. Therefore, the BPSK spec- trum is the spectrum of the baseband symbols, centered about the carrier frequency. The spectrum of the baseband symbols is rather complicated.