Why are OFDM Subcarriers Sinc Functions?
Explains the relationship between the time domain OFDM transmitted signal, and the orthogonal subcarriers in the frequency domain. Note that I simplified the diagram, only showing the elements of the vector that relate to the data-carrying sub channels. For the actual frequency domain vector that goes into the IFFT, the first element will correspond to the zero-frequency (ie. constant) waveform, so you can't put data (or a complex constellation point) into that element. If you would like to support me to make these videos, you can join the Channel Membership, by hitting the "Join" button below the video, and making a contribution to support the cost of a coffee a month. It would be very much appreciated. Check out my 'search for signals in everyday life', by following my social media feeds: Facebook: https://www.facebook.com/profile.php?... Instagram: / iainexplains Website: http://www.iaincollings.com Related videos: (see: http://iaincollings.com) • What is a Constellation Diagram? • What is a Constellation Diagram? • What is OFDM? and Why is it Used? • What is OFDM? and Why is it Used? • OFDM Waveforms • OFDM Waveforms • OFDM and the DFT • OFDM and the DFT • How are OFDM Sub Carrier Spacing and Time Samples Related? • How are OFDM Sub Carrier Spacing and Time ... • What are Doppler Shift, Doppler Spread, and Doppler Spectrum? • What are Doppler Shift, Doppler Spread, an... • What is a Matched Filter? • What is a Matched Filter? • Fourier Transform Duality Rect and Sinc Functions • Fourier Transform Duality Rect and Sinc Fu... • What is a Cyclic Prefix in OFDM? • What is a Cyclic Prefix in OFDM? • How does OFDM Overcome ISI? • How does OFDM Overcome ISI? • Why is Subcarrier Spacing Bigger in 5G Mobile Communications? • Why is Subcarrier Spacing Bigger in 5G Mob... • What is SC-FDMA? And why is it used for the Uplink of 4G/5G Mobile? • What is SC-FDMA? And why is it used for th... • Why is SC-FDMA called "Single Carrier"? • Why is SC-FDMA called "Single Carrier"? • What is MIMO OFDM? • What is MIMO OFDM? Full categorised list of videos with pdf Summary Sheets: http://iaincollings.com
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