Apparatus and method for overhead reduction of feedback in closed loop MIMO system
US8576776B2 · kind B2 · utility
1Cited by
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22Claims
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Key dates
| Filing date | Aug 6, 2010 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Dec 31, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0639
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus reduce overhead of feedback in a closed loop Multiple Input Multiple Output (MIMO) system. A controller feeds back the long-term Precoder Matrix Index (PMI) to a serving base station under direction of the serving base station when the long term PMI feedback transmission is required, generates a new codebook using the long term PMI, and determines a short term PMI from the new codebook. A feedback transmitter feeds back the short-term PMI to the serving base station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.