Transcription of myOFDM tutorial v 01 - mbi1955.com
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myOFDM tutorial v 01 - mbi1955.com
1/22 OFDM tutorial version Contents 1 Signal description .. 2 analogue signal processing .. 3 source .. 3 analogue transmitter .. 3 spectral properties .. 4 physical channel # analogue .. 6 analogue receiver .. 6 digital signal processing .. 8 digital transmitter .. 8 time discrete channel .. 9 digital 11 why using the cylic prefix ? .. 13 2 A simple simulator .. 18 18 simulation 18 QAM source .. 18 IFFT block .. 18 obtaining and adding the cyclic prefix .. 19 time discrete channel .. 19 discard cyclic prefix .. 20 transform to data vector .. 21 post processing .. 22 obtain ! Textmarke nicht definiert. plot constellation diagram of subcarriers .. 22 2/22 1 Scope The document reviews some very basic features of an OFDM transmission system.
31.03.2008 michael.biester@googlemail.com 6/22 example fig. 2-2) normalised OFDM spectrum 2.2.3 physical channel # analogue The physical channel is either characterised by its channel impulse response g(t) or in the frequency
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