Generation of a guard interval in a DMT modulation transmission

Details Generation of a guard interval in a DMT modulation transmission Generation of a guard interval in a DMT modulation transmission

2004-01-21

2009-12-15

Trost, IV, William (Department: 2416)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

C370S203000, C370S210000, C342S368000, C375S267000

Reexamination Certificate

active

07633851

ABSTRACT:
A circuit for generating a cyclic prefix of a symbol comprised of a sequence of time samples, the prefix being the reproduction of the last samples of the symbol at the beginning of the symbol, the symbol being obtained by inverse Fourier transform of complex coefficients corresponding to respective frequencies. The circuit includes a multiplier that shifts the phase of each complex coefficient by a value proportional to its frequency, a memory for storing the samples at the beginning of the symbol, and a multiplexer that copies at the end of the symbol the stored samples.

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