Howtosignalprocessing
- Why is raised cosine pulse used in digital communication system?
- Why do we use raised cosine?
- What is the advantage of the sinc pulse shape on the bandwidth and frequency domain?
- What is raised cosine spectrum?
Why is raised cosine pulse used in digital communication system?
The root raised cosine filter produces a frequency response with unity gain at low frequencies and complete at higher frequencies. It is commonly used in communications systems in pairs, where the transmitter first applies a root raised cosine filter, and then the receiver then applies a matched filter.
Why do we use raised cosine?
Raised cosine filters are used for pulse shaping, where the signal is upsampled. Therefore, we also need to specify the upsampling factor.
What is the advantage of the sinc pulse shape on the bandwidth and frequency domain?
The advantages of the sinc pulse are similar to the advantages of the rectangular pulse, except that they hold in the frequency domain rather than in the time domain. It completely restricts the frequency content within a compact box so that we can tightly meet any bandwidth constraint.
What is raised cosine spectrum?
The raised-cosine filter is a filter frequently used for pulse-shaping in digital modulation due to its ability to minimise intersymbol interference (ISI). Its name stems from the fact that the non-zero portion of the frequency spectrum of its simplest form ( ) is a cosine function, 'raised' up to sit above the.
