Method for acquiring channel state information in FDD MIMO wireless networks
US9692577B2 · kind B2 · utility
4Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2014 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Dec 20, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0026
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
This invention presents methods and circuits for a BS to acquire DL CSI in a FDD wireless network comprising switching the normal transmitting and receiving frequencies in a first and a second FDD apparatus, and using UL pilot signals to estimate the DL CSI based on reciprocity of the over the air channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.