low-cost UAV Radio Data Link

low-cost UAV Radio Data Link

1. Einführung

The digital data link modules are used for the communication between UAVs and the  ground station (GS) to send data and receive commands. The two-way radio link must have  high reliability and always be connected during the flight. Link module on UAV side must have  a low price due to limitation on UAV total cost in mass production. 

The main feature of this data link is the low rate of sending and receiving data to reduce the  occupied bandwidth and subsequently increase the sensitivity of modules.

Notizen 1: The GS module must be capable of communicating with 12 UAVs simultaneously.  

2. Technische Spezifikationen

Parameter	Wert
Maximum Operating Range	25km
Operating Height	10-5000M
Max UAVs Speed	100MS
Frequenzband	UHF (upper 400MHz)
Frequency Channel Selection	Ja
Frequenzsprung	Optional (wird bevorzugt)
UAV module Transmit Power	2W
GS module Transmit Power	10W
Datenrate	See the below figures (software selectable in range of 1kbps to 500kbps)
Packet transmission delay	≤ 5 Millisekunde
Fehlererkennung	CRC
Channel Coding (FEC)	Ja
Verschlüsselung	Ja
Senstivity	−122dBm@20kbit/s −199dBm@40kbit/s −111dBm@230kbit/s −108dBm@500kbit/s
MIMO Antenna	Optional
Betriebsmodus	Punkt zu Punkt (GS to one UAV) Point to MultiPoint (GS to maximum 12 UAVs on air, gleichzeitig)
Receive satuation power	10dBm
No damage receiver power	20dBm
Bootzeit	Less than 2sec
Operationg time	Maximal 30 minutes continuously
Working tempearure	−20°𝐶 ~ + 60°𝐶

Three working modes for this digital data link can be considered, which are described in the  following figures. According to the complexity and the cost of link module (specially on UAV  side), each topology can be selected. 

3. Netzwerktyp

1- The working frequency of all uplinks and downlinks are different (the nodes work in  different channels). 

2- The frequency of uplink and downlink for each node is the same but is different with other nodes.

3- The working frequency of all nodes is same as other nodes and GS is managing the  nodes to avoid data loss and interference. 

Notizen 2: In all the above three topologies, frequency hopping is a great advantage but is not a  critical feature.

4. Electrical and Interface

Parameter	Wert
UAV Installed Module
Eingangsspannung	9~18V
Serieller Port	1, RS422
Serial Baud Rate	9600~460800bps,
Antenna Connector	Schule
Interface Connector	J30J or DB type
Gewicht	Less than 150g
Größe (LxBxH)	8 × 8 × 3 cm
GS Installed Module
Eingangsspannung	9~18V
Serail Port	1, RS422
Serial Buad Rate	9600~460800bps,
Ethernet	RJ-45, 100Mbps
Antenna Connector	N-Type
Interface Connector	J30J or DB type
Gewicht	Less than 500g
Größe (LxBxH)	15 × 10 × 4 cm

Our low-cost UAV Radio Data Link does not has ethernet port, only serial port. The antenna connector is not N-Type, but SMA-Type. Bitte überprüfen Sie den folgenden Link.