Method and apparatus for an enhanced OFDM system

Details Method and apparatus for an enhanced OFDM system Method and apparatus for an enhanced OFDM system

2006-05-16

2006-05-16

Ton, Dang (Department: 2666)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Reexamination Certificate

active

07046617

ABSTRACT:
A method and apparatus for communicating in an OFDM system whereby data subcarriers associated with a first antenna of at least two transmit antennas are multiplexed with data symbols while modulating other subcarriers associated with other antennas with zero. The data subcarriers are separated between the at least two transmit antennas so that a data subcarrier and a mirror data subcarrier are not transmitted from a same transmit antenna and that adjacent data subcarriers are at least two subcarrier frequency bandwidths apart. In an embodiment, the method and apparatus further comprise receiving the transmitted subcarriers from at least two receive antennas where the transmitted data subcarriers are also separated so that the data subcarrier and the mirror data subcarrier are not received from a same receive antenna of the at least two receive antennas. The method and apparatus further comprises combining the received transmitted subcarriers from the at least two receive antennas into a single data stream.

REFERENCES:
patent: 5689502 (1997-11-01), Scott
patent: 5933421 (1999-08-01), Alamouti et al.
patent: 6169723 (2001-01-01), Fertner et al.
patent: 6449303 (2002-09-01), Hunton

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