Channel state information extraction method and MIMO receiver using QR decomposition and MMIB metric
US10931341B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2020 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Jan 22, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0048
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a CSI extraction method in a MIMO receiver used in a wireless communication system, the method including: obtaining an effective channel matrix by matrix multiplication of a precoding matrix and a channel estimation value obtained through a CSI-RS; calculating an upper and a lower bound of a minimum distance for each layer through QR decomposition for the effective channel matrix; and mapping the upper and the lower bound of the minimum distance for each layer to each codeword, and extracting a mean mutual information per bit (MMIB) metric that is a transmission capacity per unit frequency for each codeword. According to the present invention, QR decomposition and a MMIB metric are used to obtain the minimum distance for each layer without a multidimensional search process, whereby the CSI is extracted with fewer operations than the conventional method when the MIMO transmission order is high.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.