OFDM Tutorial Series: OFDM Cyclic Prefix

The OFDM Tutorial Series goes in depth into the theory and implementation of OFDM wireless communication systems. Starting with the treatment of multipath fading channels, OFDM is introduced as a bandwidth efficient robust communication system for multipath fading channels. Using IEEE 802.11a as a basis, a full OFDM system is described in both theory and implementation. In particular, detailed description of acquisition including packet detection, timing synchronization, carrier frequency offset estimation and correction and channel estimation and equalization is presented along with implementation details.
For the Tutorial on OFDM and OFDMNA visit:
silicondsp.com/ofdm_tutorial_...
For MIMO OFDM Tutorial Series visit the following site for detailed information:
silicondsp.com/mimo_tutorial_...
For the PDF File for Each OFDM Tutorial See the Link Below :
silicondsp.com/OFDM_Tutorial_...

[@tasneemassaf3610]

Perfect explanation

[@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?

[@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?

[@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