Channel information feedback method and apparatus thereof
US8559545B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2011 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | May 16, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0028
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A channel information feedback method adapted in a receiving end of a multiuser multiple input multiple output (MU MIMO) system has following steps. A subspace matrix and a magnitude matrix related to a transmitting end of the MU MIMO system are obtained according to a channel matrix corresponding to the receiving end. A first quantization is performed on the subspace matrix to generate a quantized subspace matrix. A second quantization is performed on an auxiliary information matrix to generate a quantized auxiliary information matrix, where the auxiliary information matrix is corresponding to the magnitude matrix and a residual subspace matrix, and the residual subspace matrix includes residual subspace information after the first quantization is performed on the subspace matrix. The quantized subspace matrix and the quantized auxiliary information matrix are fed back to the transmitting end through an uplink channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.