Method and apparatus for preamble training in a multiple antenna communication system
US8619907B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2005 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | Jul 7, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0684
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are provided for communicating data in a multiple antenna communication system having N transmit antennas. According to one aspect of the invention, a header format includes a legacy preamble having at least one legacy long training field and an extended portion having at least N additional long training fields on each of the N transmit antennas. The N additional long training fields may be tone interleaved across the N transmit antennas and are used for MIMO channel estimation. The extended portion may include a short training field for power estimation. The short training field may be tone interleaved across the N transmit antennas and have an extended duration to support beam steering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.