Sampling

ADC sampling rate in OFDM baseband processor

ADC sampling rate in OFDM baseband processor
  1. What is the sampling rate of an ADC?
  2. What is the sampling frequency in OFDM?
  3. How do I choose my ADC sample rate?
  4. How fast can an ADC sample?

What is the sampling rate of an ADC?

The sampling rate is the frequency expressed in Hertz (Hz) at which the ADC samples the input analogue signal. As mentioned before, the sampling interval is the time between successive samples: the sampling rate is thus the inverse of the sampling interval.

What is the sampling frequency in OFDM?

20 MHz.

How do I choose my ADC sample rate?

The sampling rate for your ADC should be at least double the frequency you want to measure with your ADC. If you're working in a specific frequency band, then you should choose your ADC based on the frequency at the high end of your desired band.

How fast can an ADC sample?

The ADC needs then 14TAD cycles, including the acquisition time, to complete one conversion. This makes the fastest sampling time to have 11.2µs between samples, or 89.285KSPS.

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