OFDM Tutorial Series: OFDM Cyclic Prefix

[@roadracer1593]

Who is Si DSP corp? A virtual mom and pop operation?

[@alainpannetier2543]

Why do we need to copy. Why can't we just generate the 80 samples directly from the IDFT? That should yield the exact same result. No? What did I miss?

[@odissey2]

Same question. My guess they want to save DDS resources generating those extra 16 sine points

[@tasneemassaf3610]

Perfect explanation

[@odissey2]

Thank you for the excellent presentation. Maybe I missed that part, but how do we lock to the incoming data packet frequency, so that sampling begins more or less at the start of the packet?

[@naveenmanikandanperiasamy1331]

Why is CP length of 800ns not sufficient to combat delay spread of 200ns(leaving a residual in the next symbol in example shown)? What is the relationship between relation between minimum CP length required given a doppler spread?