ADC or Ultra wide Band wireless receiver

[vivek kajla]

hello every one , I m doning a project over ADC , in some intel report i read that for UWB receiver arhitecture atleast we want 528 MSPS 4 bit ADC for m-ary OFDM technique,inspite of the input frequency being in range of GHz ,how does OFDM technique works for so less sampling freq.

 

[u7karsh]

In order to fully reconstruct a signal of a frequency f, we need to sample it at a frequency greater than twice of the max frequency f. Thus if we have a carrier of a very high frequency, use a low sampling ADC. With this, we will fully reconstruct our low pass message while loose all the high frequency carrier component.