Features
User Manual for AZ430 WAN Satellite Modem
6 FEATURES
6.1
The Noise and Distortion Estimator (NoDE)
6.1.1 Introduction
NoDE (Noise & Distortion Estimator) simplifies ground station operation activities
and enables an efficient usage of transponders. NoDE is a unique and innovative
tool that simplifies ground station operation activities by providing a means to
monitor the quality of the satellite link. It performs a continuous and accurate
measurement of the noise margin and the amount of non-linear distortion on the
received satellite signal. NoDE allows operators to easily fine tune their satellite
links to their optimal operational point under any circumstances. Regular fine tuning
of the satellite link parameters will increase the efficiency of the transponder and at
the same time provide financial benefits.
In addition, NoDE enables the operator to view the linear and non-linear effects
from changes in the uplink power. It can help to prevent errors in operations such
as the addition of too much power and distortion that could lead to the total loss of
the communication links.
NoDE is the perfect tool to provide operators full control over transmission
performance when linear and non-linear distortions are present. It enables higher
modulation schemes such as 16APSK and 32 APSK and helps operators to get the
most out of their transponder.
6.1.2
How does NoDE work
In digital satellite communications the energy per symbol related to the noise power
spectral density (Es/No) is an important parameter used to determine the quality of
the transmission. The Es/No measurement at the receiver side needs a certain
threshold to ensure an error-free transmission.
Figure 14 - PER Vs Es/No
version 1.0
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SHAPING THE FUTURE OF SATELLITE COMMUNICATIONS
