Method and apparatus for reducing power fluctuations during preamble training in a multiple antenna communication system using cyclic delays
US7855993B2 · kind B2 · utility
17Cited by
3References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 21, 2006 |
| Grant date | Dec 21, 2010 |
| Priority date | — |
| Expiry date | Jun 29, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/261
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.