Minimizing feedback rate for channel state information in MIMO systems
US7359470B2 · kind B2 · utility
3Cited by
2References
13Claims
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Key dates
| Filing date | Sep 10, 2004 |
| Grant date | Apr 15, 2008 |
| Priority date | — |
| Expiry date | Jun 20, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0687
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method minimizes a rate for feeding back channel state information from a receiver to a transmitter in a multi-input, multi-output communications systems. A temporal autocorrelation function of the channel between the transmitter and the receiver is determined. A spatial covariance information is estimated of the channel. Then, the minimum rate for feeding back channel state information from the receiver to the transmitter is based on actual channel state information and the estimated spatial covariance information and the temporal autocorrelation function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.