Orthogonal frequency division multiplexing system with...

Details Orthogonal frequency division multiplexing system with... Orthogonal frequency division multiplexing system with...

2007-05-15

2007-05-15

Jung, Min (Department: 2663)

Multiplex communications

Generalized orthogonal or special mathematical techniques

C370S350000, C370S522000

Reexamination Certificate

active

10060502

ABSTRACT:
A wireless transmitter (TX1). The transmitter comprises circuitry for providing a plurality of control (CONTROL) bits and circuitry for providing a plurality of user (USER) bits. The transmitter also comprises circuitry for modulating (16) the plurality of control bits and the plurality of user bits into a stream of complex symbols and circuitry (18) for converting the stream of complex symbols into a parallel plurality of complex symbol streams. The transmitter also comprises circuitry (20) for performing an inverse fast Fourier transform on the parallel plurality of complex symbol streams to form a parallel plurality of OFDM symbols and circuitry (22) for converting the parallel plurality of OFDM symbols into a serial stream of OFDM symbols. Each OFDM symbol in the serial stream of OFDM symbols comprises a plurality of data points, and selected (SF2.x) OFDM symbols in the serial stream of OFDM symbols carry modulation information (AMOD). The modulation information in one or more of the selected OFDM symbols comprises a plurality of modulation groups, and the plurality of modulation groups comprises a number of modulation parameters that describe modulation of a corresponding set of data points in a subsequent OFDM symbol in the serial stream of OFDM symbols.

REFERENCES:
patent: 6172993 (2001-01-01), Kim et al.
patent: 6389087 (2002-05-01), Heinonen et al.
patent: 6487252 (2002-11-01), Kleider et al.
patent: 2003/0156534 (2003-08-01), Coulson et al.
patent: 2005/0207334 (2005-09-01), Hadad

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