I am studying the effect of time offset in OFDM system, I am interested in calculating the power of the ICI on each subcarrier, I am a bit confused about how to do it in Matlab, so how can I measure the power of ICI on a specific subcarrier in Matlab?
In order to measure the ICI power on a subcarrier x (ICI that is caused by all other subcarriers). Simply, consider an ideal system without any source of noise, keep all subcarriers turned on (activated) and turn off subcarrier x (through power loading or bit loading) so that subcarrier x does not convey any data. At the receiver, after FFT, the power on subcarrier x is the ICI power. Moreover, the measured EVM (in dB) at subcarrier x is indeed the ICI power in dB.