Proposals For More Reliable Radio Link - Satel TR489 Integration Manual

Proposals for more reliable radio link

9.4
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 recommend 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, value.
• 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.
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SATEL-TR489
Integration Guide, Version 0.9