Wednesday, October 3, 2018

digital communications - What does the one-tap equalizer used with OFDM accomplish?


I've read that OFDM normally uses a one-tap equalizer. It seems that a one-tap equalizer could only scale and delay a signal. Why is this useful?


I thought multipath was handled through the cyclic-prefix and by choosing a symbol width that is large compared to the delay spread. Why is an equalizer needed at all?




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periodic trends - Comparing radii in lithium, beryllium, magnesium, aluminium and sodium ions

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