Precoding selection for retransmission in uplink MIMO hybrid ARQ
US8699621B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2011 |
| Grant date | Apr 15, 2014 |
| Priority date | — |
| Expiry date | Dec 23, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03426
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method includes obtaining a precoder for retransmission of one codeword responsive to a known precoding matrix of a certain rank and modulation and coding scheme assignments used in an original transmission, and a desired retransmission rank', forming an approximate channel covariance matrix; stimating an a minimum mean square error receiver signal-to-noise-interference-ratio for each layer to be retransmitted responsive to the prior forming; and finding a precoding matrix from a preceding codebook that maximizes a sum-rate for enabling precoding selections for retransmissions in uplink multiple-input multiple-output MIMO hybrid automatic repeat request HARQ.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.