Speeding up transmissions from the field
Wireless propagation is affected by environmental factors including weather, tidal levels, and obstructive trees. The bidirectional system monitors the received signals and returns their channel status back to the origin, where the FPU automatically selects a modulation scheme that can maintain the quality of the signals it sends. This means on-site crews can save time when setting up and checking the signal conditions, and they can also send files in a shorter time by using a modulation scheme with adequate robustness for the transmission conditions.
To achieve reliable transmissions, conventional, unidirectional FPUs send data with a fixed amount of redundant data. The bidirectional FPU sends data with a small amount of redundant data at first. It sends additional redundant data only when a data transmission fails. The effect is that the bidirectional system is more efficient and reliable than the unidirectional one.
As well as improving operational efficiency, we will research multi-relay FPU transmissions.
* FPU (Field Pick-up Unit): A portable wireless transmission system used for the transmission of live and recorded video from remote locations.