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The specific of such scenarios is the signal propagation path, since a part of the route is located above the water surface. The radio signal is reflected from the water surface, as a result an intersymbol inter-symbol interference (ISI) appears at the receiver side. To reduce the effect of the ISIIn order to overcome the ISI effects, the guard interval between messages can the air frames should be increased. The guard interval configuration can be configured on the InfiLINK 2x2 and InfiMAN 2x2 family devices with the TDMA software version by disabling Depending on the equipment type, the following configuration options for increasing the guard interval are available:
- R5000 series - disable the "short guard interval mode" parameter using the "rfconfig rf5.0 -shortgi"
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- command for the 40 MHz channels (if other channel sizes are used, the long guard interval is already in use and cannot be modified);
- Quanta 5 devices - increase the "GI" parameter
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- ;
- XG - Make sure that the "Short Cyclic Prefix" option is disabled in the "Radio Settings" section
Rolling should also be taken into account in such projects. In order to maintain the position of the CPE relative to the BS, a roll compensation device with a gyroscopic function can be used.
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