Multiple antenna transmission with variable diversity gain
US9325404B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 2012 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | Nov 19, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0678
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A MIMO transmitter has a modulator (40,41,42, 120, 122) a demultiplexer 100 arranged to divide the information into one or more demux streams for transmission over different ones of the channels, and a diversity splitter (110) to derive one or more sub-streams of the same information. A decorrelator (120) such as a scrambler (150, 155) decorrelates the sub-streams before or after the modulation. The arrangement is configurable to vary in use a ratio of demultiplexing and of diversity splitting. This balances between the gains from diversity and spatial multiplexing, without needing major changes to the transmit and receive processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.