Simplified method of detection by spheres when there is a low signal to noise ratio
US6987818B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 31, 2001 |
| Grant date | Jan 17, 2006 |
| Priority date | — |
| Expiry date | Feb 4, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/71057
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Method of detecting a plurality of symbols transmitted by or to a plurality of users from a received signal, each symbol of a user belonging to a modulation constellation, the detection method using a lattice of points generated by the said modulation constellations, the said plurality of symbols of the different users being represented by a point amongst a subset of points in the said lattice, the said constellation and the received signal being represented by a point characteristic of this signal, referred to as the received point, translated from a point in the said constellation by a noise vector, the method including a step of orthogonal projection of the received point onto an affine subspace, referred to as a projection subspace, parallel to or merged with an affine subspace delimiting the constellation, and a step of seeking the closest neighbor to the point thus projected amongst the points in the constellation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.