Hi everybody, to the extent I know (may be I am wrong, I am not sure) if the number of subcarriers is increased then the width of each subcarrier will be narrower, i.e., there will be no increase in the bandwidth of the overall system bandwidth. The number of subcarriers does not affect the system bandwith. If it is ok, then now how can the bandwidth be changed? As stated aove in the comments, it can be changed by changing the data rate. But I didn’t understand how changing the data rate can change the bandwidth.