AR044541A1 - METHOD AND APPLIANCE TO ESTIMATE NOISE IN AN OFDM SYSTEM - Google Patents
METHOD AND APPLIANCE TO ESTIMATE NOISE IN AN OFDM SYSTEMInfo
- Publication number
- AR044541A1 AR044541A1 ARP040101674A AR044541A1 AR 044541 A1 AR044541 A1 AR 044541A1 AR P040101674 A ARP040101674 A AR P040101674A AR 044541 A1 AR044541 A1 AR 044541A1
- Authority
- AR
- Argentina
- Prior art keywords
- noise
- interference
- subcarrier
- measured
- users
- Prior art date
Links
Abstract
El ruido y la interferencia pueden ser medidos independientemente en un sistema de OFDM (Orthogonal Frequency Division Multiplexing, Multiplexado por División Ortogonal de la Frecuencia). La interferencia co-canal es medida en un sistema OFDM de saltos de frecuencia, de múltiples usuarios, mediante el rastreo de los sub-portadores asignados a todos los usuarios en un área de servicio o celda en particular. El ruido + interferencia, compuestos, pueden ser determinados mediante la medición de la cantidad de potencia recibida en un sub-portador cada vez que no haya sido asignado a ningún usuario en la celda. Se almacena un valor para cada uno de los sub-portadores en el sistema, y el ruido + interferencia pueden ser un promedio ponderado del valor actual con los valores anteriormente almacenados. El componente ruido puede ser determinado independientemente en un sistema síncrono. En el sistema síncrono, es posible prohibir periódicamente a todos los usuarios en un sistema que propalen sobre un sub-portador, y la potencia recibida en el sub-portador es medida durante el período que no tiene propalaciones.Noise and interference can be measured independently in an OFDM (Orthogonal Frequency Division Multiplexing, Multiplexed by Orthogonal Frequency Division) system. Co-channel interference is measured in a multi-user OFDM frequency hopping system, by tracking the subcarriers assigned to all users in a particular service area or cell. The noise + interference, compounds, can be determined by measuring the amount of power received in a subcarrier each time it has not been assigned to any user in the cell. A value is stored for each of the subcarriers in the system, and the noise + interference can be a weighted average of the current value with the previously stored values. The noise component can be determined independently in a synchronous system. In the synchronous system, it is possible to periodically prohibit all users in a system that propagate on a subcarrier, and the power received in the subcarrier is measured during the period that has no propagation.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/809,538 US8477592B2 (en) | 2003-05-14 | 2004-03-24 | Interference and noise estimation in an OFDM system |
Publications (1)
Publication Number | Publication Date |
---|---|
AR044541A1 true AR044541A1 (en) | 2005-09-21 |
Family
ID=42778231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ARP040101674 AR044541A1 (en) | 2004-03-24 | 2004-05-14 | METHOD AND APPLIANCE TO ESTIMATE NOISE IN AN OFDM SYSTEM |
Country Status (1)
Country | Link |
---|---|
AR (1) | AR044541A1 (en) |
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2004
- 2004-05-14 AR ARP040101674 patent/AR044541A1/en active IP Right Grant
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