Since the receiver has full knowledge of all the steps taken to transmit, the reception process is the exact inverse of transmission. The only difference is the addition of the channel equalization described in the previous part. To get back the information we originally sent, we simply:
Take the FFT of the reception and divide it by the FFT of the impulse response. Then iFFT it back.
Remove the cyclic prefix
Take the Fourier Transform
Demirror the vector
Approximate each received value to nearest point in constellation and map them back to the original bit sequences. See figure below for example in 4 bit approximation.
Convert the binary series back to ascii letter equivalents.
Please see the block diagram below. It summarizes the reception process.
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The term pathogen came into use in the 1880s.[1][2
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Source:
OpenStax, Discrete multi-tone communication over acoustic channel. OpenStax CNX. Dec 16, 2009 Download for free at http://cnx.org/content/col11146/1.1
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