SATELLINE-M3-TR3,
–
TR4 and -R4
Integration Guide, Version 3.0
45
11
PROPOSALS FOR MORE RELIABLE RADIO LINK
In case where the environment is challenging the following methods can be used for improving
the transmission reliability:
•
Forward Error Correction, FEC, is recommend to use in challenging environment like
urban areas.
•
Directional antennas.
•
Before building the radio link(s) it is highly recommended that the radio environment
is measured to find out whether the radio environment is clean enough by using a
spectrum analyzer or radio module’s RSSI, Received Signal Strength Indication, va
lue.
•
Co-operation with the local authority to find out the optimum free radio channel.
•
If the channel is disturbed an external band-pass filter can be used for improving the
filtering.
•
If at the adjacent channel is TDMA, Time Domain Multiple Access, it is recommended
to use time slot for receiving which is not in synchronization with the TDMA radio
transmission.
•
In Europe it is not recommended to use channels which are located near by the TETRA
or television frequencies.