Howtosignalprocessing
- Why is upsampling needed?
- Why do you need upsampling before pulse shaping?
- What is the purpose of upsampling downsampling?
- Why do we need to modulate your information signal prior to the transmission?
Why is upsampling needed?
The purpose of Upsampling is to manipulate a signal in order to artificially increase the sampling rate. This is done by... Upsampling is an effective way to reduce time between samples of a signal without resampling the original signal.
Why do you need upsampling before pulse shaping?
Pushing the sample rate out by upsampling provides room to shape the spectrum as needed for transmit mask as well as matching. The same thing can be seen in the time domain. Shaping the eye pattern can only be done if there are more than one sample per symbol. That clear up some confusion.
What is the purpose of upsampling downsampling?
Upsampling, on the other hand, is nothing but the inverse objective of that of downsampling: To increase the number of rows and/or columns (dimensions) of the image .
Why do we need to modulate your information signal prior to the transmission?
The signals within 20 Hz to 20 kHz frequency range can travel only a few distances. To send the message signal, the length of the antenna should be a quarter wavelength of the used frequency. Thus, modulation is required to increase the frequency of the message signal and to enhance its strength to reach the receiver.
