How can I extract the 2 polyphase components of a signal after sampling at the half of sampling rate

1. How do you downsample a signal?
2. What is the process of downsampling called?
3. How do you find the number of samples of a signal?
4. What is resampling in signal processing?

How do you downsample a signal?

y = downsample( x , n ) decreases the sample rate of x by keeping the first sample and then every n th sample after the first. If x is a matrix, the function treats each column as a separate sequence. y = downsample( x , n , phase ) specifies the number of samples by which to offset the downsampled sequence.

What is the process of downsampling called?

The down sampling process is called decimation.

How do you find the number of samples of a signal?

The sampling frequency or sampling rate, f_s, is the average number of samples obtained in one second, thus f_s = 1/T. Its unit is sample per second or hertz e.g. 48 kHz is 48,000 samples per second.

What is resampling in signal processing?

resample Function

One resampling application is the conversion of digitized audio signals from one sample rate to another, such as from 48 kHz (the digital audio tape standard) to 44.1 kHz (the compact disc standard).