Methods and apparatus of providing transmit and/or receive diversity with multiple antennas in wireless communication systems
US7610024B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2005 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Oct 3, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/006
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Transmit and/or receive diversity is achieved using multiple antennas. In some embodiments, a single transmitter chain within a wireless terminal is coupled over time to a plurality of transmit antennas. At any given time, a controllable switching module couples the single transmitter chain to one the plurality of transmit antennas. Over time, the switching module couples the output signals from the single transmitter chain to different transmit antennas. Switching decisions are based upon predetermined information, dwell information, and/or channel condition feedback information. Switching is performed on some dwell and/or channel estimation boundaries. In some OFDM embodiments, each of multiple transmitter chains is coupled respectively to a different transmit antenna. Information to be transmitted is mapped to a plurality of tones. Different subsets of tones are formed for and transmitted through different transmit chain/antenna sets simultaneously. The balance of tones allocated to the subsets for each antenna are changed as a function of predetermined information, dwell information, and/or channel condition feedback information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.