Method and apparatus for modulating symbols in an orthogonal...

Details Method and apparatus for modulating symbols in an orthogonal... Method and apparatus for modulating symbols in an orthogonal...

2007-12-28

2011-10-25

Mai, Tan V (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

08046398

ABSTRACT:
A method for modulating a symbol in a transmitter of an Orthogonal Frequency Division Multiplexing (OFDM) system. The symbol modulation method includes multiplying an input stream of an Inverse Fast Fourier Transform (IFFT) unit by a Twiddling factor for circular-shifting the input stream of the IFFT unit by a Cyclic Prefix (CP) length; performing IFFT on the input stream of the IFFT unit, which is multiplied by the Twiddling factor; buffering data corresponding to the CP length beginning from a front of an output stream of the IFFT unit; and generating an OFDM symbol by forward-copying the buffered data to a back of the output stream of the IFFT unit.

REFERENCES:
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patent: 2003/0081763 (2003-05-01), Tang et al.
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patent: 1020010048447 (2001-06-01), None
patent: 1020030092704 (2003-12-01), None
patent: 1020050120964 (2005-12-01), None

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