BPSK and pulse shaping (square-root raised cosine)

1. What is square-root-raised-cosine filter?
2. What is raised cosine pulse?
3. Why do we use root raised cosine?
4. What is the function of pulse shaping?

What is square-root-raised-cosine filter?

In signal processing, a root-raised-cosine filter (RRC), sometimes known as square-root-raised-cosine filter (SRRC), is frequently used as the transmit and receive filter in a digital communication system to perform matched filtering. This helps in minimizing intersymbol interference (ISI).

What is raised cosine pulse?

The raised cosine pulse is one type of Nyquist-II pulse. It possesses a transfer function given by. (3.67) where β is called the roll-off factor, which takes values between 0 to 1, and β/2T is called the excess bandwidth. Figure 3.23 illustrates the raised cosine spectral characteristics.

Why do we use root raised cosine?

Using 90% power Bandwidth (BW) measurement definition showed that the RRC filtering might improve spectrum efficiency by more than 75%. Furthermore using the matching RRC filters both in the transmitter and receiver provides the improved Bit Error Rate (BER) performance.

What is the function of pulse shaping?

Pulse shaping is the process of shaping pulses to be transmitted based on the symbols generated via modulation (Lab 3). The goal is to make the signal suitable to be transmitted through the communication channel mainly by limiting its effective bandwidth.