Method and system for multi-antenna preambles for wireless...

Details Method and system for multi-antenna preambles for wireless... Method and system for multi-antenna preambles for wireless...

2011-08-16

2011-08-16

Vu, Huy D (Department: 2461)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

C370S203000

Reexamination Certificate

active

08000223

ABSTRACT:
Methods and systems for processing multiple preambles for a wireless signal are disclosed herein. Aspects of the method may comprise selecting a portion of a preamble, and shifting the selected portion of the preamble to generate a plurality of subsequent preambles. The preamble may comprise a legacy preamble and/or an 802.11(n) preamble. The selected portion of the preamble may comprise a short training sequence. The shifting may comprise circular shifting. The circular shifting may comprise forward circular shifting and/or backwards circular shifting. The generated plurality of subsequent preambles may be transmitted via a plurality of antennas. A phase roll may be added to the selected portion of the preamble to generate the plurality of subsequent preambles.

REFERENCES:
patent: 6850481 (2005-02-01), Wu et al.
patent: 7136434 (2006-11-01), Hwang
patent: 2002/0041635 (2002-04-01), Ma et al.
patent: 2004/0233838 (2004-11-01), Sudo et al.
patent: 2005/0141407 (2005-06-01), Sandhu
patent: 2005/0286474 (2005-12-01), van Zelst et al.

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