Method and apparatus for reducing power fluctuations during...

Details Method and apparatus for reducing power fluctuations during... Method and apparatus for reducing power fluctuations during...

2006-08-21

2010-12-21

Taylor, Barry W (Department: 2617)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S349000

Reexamination Certificate

active

07855993

ABSTRACT:
Methods and apparatus are provided for reducing power fluctuations during preamble training in a multiple antenna communication system using cyclic delays. A preamble having a legacy portion and a high throughput portion is transmitted (or received) on each of N antennas, wherein at least a portion of the preamble on a first of the N antennas is delayed relative to at least the portion of the preamble on a second of the N antennas, wherein the delay is non-orthogonal amount to introduce variation across the preambles transmitted on the N transmit antennas. The legacy portion may be, for example, an 802.11 a/g preamble.

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