MIMO OFDMA with antenna selection and subband handoff
US8274943B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2010 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | May 21, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0075
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An access node wirelessly coupled to a plurality of access terminals, having a subband scheduler, a plurality of orthogonal frequency division multiplex elements, and a plurality of antennas. The subband scheduler receives precoded data, and schedules transmission of a preamble signal and a plurality of data streams. The plurality of orthogonal frequency division multiplex elements converts the preamble signal and the plurality of data streams into a corresponding preamble tone and a corresponding plurality of data tones. The preamble tone indicates a mapping of the plurality of data tones to one or more of the plurality of access terminals. The plurality of antennas transmits the corresponding preamble tone and the corresponding plurality of data tones in timely fashion for receipt by the plurality of access terminals. The corresponding preamble tone and the corresponding data tones are transmitted over subbands of a code division multiple access (CDMA)-based carrier frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.