How to Emulate Sample Frequency Offset for OFDM in Matlab?

1. How do you create a sampling frequency in Matlab?
2. How does Matlab reduce sampling frequency?
3. What causes frequency offset in OFDM?

How do you create a sampling frequency in Matlab?

The sampling frequency or sampling rate, fs, is the average number of samples obtained in one second (samples per second), thus fs = 1/T. To sample a signal in MATLAB, generate a time vector at the appropiate rate, and use this to generate the signal. Plot using the stem function.

How does Matlab reduce sampling frequency?

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 causes frequency offset in OFDM?

The first is called Carrier Frequency Offset (CFO) and is caused by the difference between the transmitter and receiver's Local Oscillator (LO). This symptom of this offset is a phase rotation of incoming I/Q samples (time domain). The second is Sampling Frequency Offset (SFO) and is caused by the sampling effect.