Which type of RF transmitter and receivers can be used to transmit video over the range of more than 500m. ?
You might want to look into wifibroadcast which uses off-the-shelf WiFi hardware :
Why normal wifi is a bad choice for FPV applications
- Association: Video transmitter and receiver need to be associated. If one device looses association (for example due to too weak signal strength) the video transmission stops instantly.
- Error-free transmission: Wifi transmits either data that is correct or no data.
- Two-way communication: Even if you are sending data only from source to sink a bi-directional data flow is required using wifi. The reason for this is that a wifi receiver needs to acknowledge the received packets.
- One to one transfers: Unless you use broadcast frames or similar techniques a normal wifi data flow is a one to one connection.
What wifibroadcast makes different
Wifibroadcast puts the wifi cards into monitor mode. This mode allows to send and receive arbitrary packets without association.
Additionally, it is also possible to receive erroneous frames (where the checksum does not match). This way a true unidirectional connection is established which mimics the advantageous properties of an analog link.
Wifibroadcast uses Forward Error Correction to archive a high reliability at low bandwidth requirements. It is able to repair lost or corrupted packets at the receiver.