Method and apparatus for estimating noise variance
US8295327B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 2007 |
| Grant date | Oct 23, 2012 |
| Priority date | — |
| Expiry date | Sep 1, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/20
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention is directed towards a method and apparatus for estimating a noise variance in a receiver of a code multiplex telecommunications system with orthogonal spreading codes, wherein respective real and imaginary parts of a sum and a difference of two estimated symbols having substantially same amplitudes are determined, and then respective minimum energy components of the determined real and imaginary parts of the sum and difference are determined. The respective minimum energy components are finally combined to obtain the noise variance. Thereby, noise variance can be estimated simply based on addition and comparison operations, which reduces complexity and processing load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.